/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:46:56,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:46:56,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:46:56,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 17:46:56,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 17:46:56,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 17:46:56,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 17:46:56,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 17:46:56,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 17:46:56,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 17:46:56,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 17:46:56,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 17:46:56,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:46:56,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:46:56,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:46:56,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:46:56,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:46:56,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:46:56,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:46:56,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:46:56,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:46:56,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:46:56,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:46:56,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:46:56,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 17:46:56,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 17:46:56,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 17:46:56,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 17:46:56,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 17:46:56,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 17:46:56,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 17:46:56,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 17:46:56,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 17:46:56,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 17:46:56,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 17:46:56,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 17:46:56,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 17:46:56,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 17:46:56,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:46:56,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:46:56,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:46:56,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:46:56,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:46:56,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:46:56,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:46:56,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:46:56,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:46:56,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:46:56,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:46:56,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:46:56,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:46:56,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:46:56,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:46:56,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:46:56,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:46:56,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:46:56,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:46:56,336 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:46:56,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:46:56,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:46:56,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:46:56,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:46:56,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:46:56,566 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:46:56,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2022-01-31 17:46:56,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3898a79a/fde29683f7414080abbbc0b391bb9ab1/FLAGfb1623edf [2022-01-31 17:46:56,920 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:46:56,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2022-01-31 17:46:56,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3898a79a/fde29683f7414080abbbc0b391bb9ab1/FLAGfb1623edf [2022-01-31 17:46:57,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3898a79a/fde29683f7414080abbbc0b391bb9ab1 [2022-01-31 17:46:57,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:46:57,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:46:57,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:46:57,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:46:57,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:46:57,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b6a86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57, skipping insertion in model container [2022-01-31 17:46:57,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:46:57,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:46:57,458 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-examples/standard_minInArray_ground-2.i[821,834] [2022-01-31 17:46:57,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:46:57,473 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:46:57,487 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-examples/standard_minInArray_ground-2.i[821,834] [2022-01-31 17:46:57,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:46:57,501 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:46:57,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57 WrapperNode [2022-01-31 17:46:57,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:46:57,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:46:57,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:46:57,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:46:57,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:46:57,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:46:57,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:46:57,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:46:57,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (1/1) ... [2022-01-31 17:46:57,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:46:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:46:57,565 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 17:46:57,593 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 17:46:57,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:46:57,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:46:57,605 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:46:57,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:46:57,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:46:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:46:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:46:57,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:46:57,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:46:57,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:46:57,670 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:46:57,671 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:46:57,800 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:46:57,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:46:57,807 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:46:57,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:46:57 BoogieIcfgContainer [2022-01-31 17:46:57,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:46:57,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:46:57,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:46:57,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:46:57,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:46:57" (1/3) ... [2022-01-31 17:46:57,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b34e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:46:57, skipping insertion in model container [2022-01-31 17:46:57,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:46:57" (2/3) ... [2022-01-31 17:46:57,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b34e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:46:57, skipping insertion in model container [2022-01-31 17:46:57,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:46:57" (3/3) ... [2022-01-31 17:46:57,828 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2022-01-31 17:46:57,831 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:46:57,831 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:46:57,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:46:57,864 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:46:57,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:46:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:46:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:46:57,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:57,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:57,896 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1266308725, now seen corresponding path program 1 times [2022-01-31 17:46:57,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:57,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805879443] [2022-01-31 17:46:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:57,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:57,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:58,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805879443] [2022-01-31 17:46:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805879443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:58,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:58,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:46:58,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675687562] [2022-01-31 17:46:58,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:58,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:46:58,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:46:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:46:58,109 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:58,149 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-31 17:46:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:46:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:46:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:58,157 INFO L225 Difference]: With dead ends: 48 [2022-01-31 17:46:58,157 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 17:46:58,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:46:58,162 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:58,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:46:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 17:46:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 17:46:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 17:46:58,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-01-31 17:46:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:58,203 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 17:46:58,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 17:46:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:46:58,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:58,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:58,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:46:58,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash -184122438, now seen corresponding path program 1 times [2022-01-31 17:46:58,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:58,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715789786] [2022-01-31 17:46:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:58,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:58,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:58,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715789786] [2022-01-31 17:46:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1715789786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:58,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:58,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:46:58,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090985217] [2022-01-31 17:46:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:46:58,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:46:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:46:58,263 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:58,335 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-31 17:46:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:46:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:46:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:58,337 INFO L225 Difference]: With dead ends: 43 [2022-01-31 17:46:58,337 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:46:58,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:46:58,342 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:58,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:46:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:46:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-31 17:46:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 17:46:58,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2022-01-31 17:46:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:58,354 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 17:46:58,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 17:46:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:46:58,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:58,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:58,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:46:58,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1441731324, now seen corresponding path program 1 times [2022-01-31 17:46:58,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885450040] [2022-01-31 17:46:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:58,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:58,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:58,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:58,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:58,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885450040] [2022-01-31 17:46:58,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [885450040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:58,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:58,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:46:58,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308610641] [2022-01-31 17:46:58,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:58,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:46:58,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:46:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:46:58,440 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:58,530 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-01-31 17:46:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:46:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 17:46:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:58,532 INFO L225 Difference]: With dead ends: 49 [2022-01-31 17:46:58,532 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 17:46:58,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:46:58,537 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:58,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 17:46:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-01-31 17:46:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 17:46:58,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-31 17:46:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:58,544 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 17:46:58,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 17:46:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:46:58,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:58,545 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] [2022-01-31 17:46:58,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:46:58,545 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1583091594, now seen corresponding path program 2 times [2022-01-31 17:46:58,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:58,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796564743] [2022-01-31 17:46:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:58,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:58,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:58,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:58,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:58,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:58,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796564743] [2022-01-31 17:46:58,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796564743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:58,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:58,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:46:58,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973242691] [2022-01-31 17:46:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:58,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:46:58,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:46:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:46:58,617 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:58,693 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-01-31 17:46:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:46:58,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 17:46:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:58,694 INFO L225 Difference]: With dead ends: 57 [2022-01-31 17:46:58,694 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 17:46:58,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:46:58,696 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:58,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 27 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:46:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 17:46:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-01-31 17:46:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-31 17:46:58,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2022-01-31 17:46:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:58,712 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-31 17:46:58,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-31 17:46:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 17:46:58,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:58,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:58,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:46:58,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash 361478720, now seen corresponding path program 3 times [2022-01-31 17:46:58,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934929905] [2022-01-31 17:46:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:58,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:58,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:58,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:58,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:58,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:58,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934929905] [2022-01-31 17:46:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [934929905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:58,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:58,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:46:58,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546889379] [2022-01-31 17:46:58,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:58,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:46:58,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:46:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:46:58,782 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:58,887 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-01-31 17:46:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:46:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 17:46:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:58,891 INFO L225 Difference]: With dead ends: 65 [2022-01-31 17:46:58,892 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:46:58,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:46:58,894 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:58,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 27 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:46:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-31 17:46:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-31 17:46:58,905 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 30 [2022-01-31 17:46:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:58,905 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-31 17:46:58,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-31 17:46:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:46:58,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:58,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:58,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:46:58,907 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1192961330, now seen corresponding path program 4 times [2022-01-31 17:46:58,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:58,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80785059] [2022-01-31 17:46:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:58,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:58,920 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:58,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:58,921 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:58,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80785059] [2022-01-31 17:46:58,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80785059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:58,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:58,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:46:58,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941127150] [2022-01-31 17:46:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:58,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:46:58,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:46:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:46:58,993 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:59,096 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-01-31 17:46:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:46:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:46:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:59,097 INFO L225 Difference]: With dead ends: 73 [2022-01-31 17:46:59,097 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:46:59,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:46:59,098 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:59,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 37 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:46:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-01-31 17:46:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-01-31 17:46:59,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 35 [2022-01-31 17:46:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:59,110 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-01-31 17:46:59,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-01-31 17:46:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:46:59,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:59,113 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:59,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:46:59,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:59,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1077066116, now seen corresponding path program 5 times [2022-01-31 17:46:59,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576710343] [2022-01-31 17:46:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:59,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:59,121 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:59,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:59,122 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576710343] [2022-01-31 17:46:59,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576710343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:46:59,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414534424] [2022-01-31 17:46:59,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:46:59,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:46:59,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:46:59,215 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:59,318 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2022-01-31 17:46:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:46:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 17:46:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:59,320 INFO L225 Difference]: With dead ends: 81 [2022-01-31 17:46:59,320 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 17:46:59,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:46:59,323 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:59,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 32 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 17:46:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-01-31 17:46:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-01-31 17:46:59,329 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 40 [2022-01-31 17:46:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:59,329 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-01-31 17:46:59,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-01-31 17:46:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:46:59,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:59,330 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:59,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:46:59,330 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash -463216146, now seen corresponding path program 6 times [2022-01-31 17:46:59,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685380120] [2022-01-31 17:46:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:59,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:59,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:59,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:59,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685380120] [2022-01-31 17:46:59,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [685380120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:46:59,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515175625] [2022-01-31 17:46:59,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:46:59,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:46:59,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:46:59,424 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:59,556 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2022-01-31 17:46:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:46:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 17:46:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:59,558 INFO L225 Difference]: With dead ends: 89 [2022-01-31 17:46:59,558 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:46:59,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:46:59,559 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:59,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 32 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:46:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-01-31 17:46:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-01-31 17:46:59,576 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 45 [2022-01-31 17:46:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:59,576 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-01-31 17:46:59,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-01-31 17:46:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 17:46:59,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:59,580 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:59,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:46:59,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:59,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1642877128, now seen corresponding path program 7 times [2022-01-31 17:46:59,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:59,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707335981] [2022-01-31 17:46:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:59,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:59,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:59,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:59,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,695 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707335981] [2022-01-31 17:46:59,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707335981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:46:59,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443767732] [2022-01-31 17:46:59,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:46:59,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:46:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:46:59,696 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:59,835 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-01-31 17:46:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:46:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 17:46:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:59,836 INFO L225 Difference]: With dead ends: 97 [2022-01-31 17:46:59,836 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 17:46:59,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:46:59,837 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:59,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 47 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:46:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 17:46:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-01-31 17:46:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-01-31 17:46:59,842 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 50 [2022-01-31 17:46:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:59,843 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-01-31 17:46:59,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-01-31 17:46:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:46:59,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:59,843 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:59,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:46:59,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1317673302, now seen corresponding path program 8 times [2022-01-31 17:46:59,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:59,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537053757] [2022-01-31 17:46:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:59,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:59,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:59,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:59,846 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537053757] [2022-01-31 17:46:59,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [537053757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:46:59,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665382735] [2022-01-31 17:46:59,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:46:59,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:46:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:46:59,945 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:00,075 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-01-31 17:47:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:47:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 17:47:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:00,076 INFO L225 Difference]: With dead ends: 105 [2022-01-31 17:47:00,076 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:47:00,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:47:00,077 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:00,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 37 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:47:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-31 17:47:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-01-31 17:47:00,083 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 55 [2022-01-31 17:47:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:00,084 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-01-31 17:47:00,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-01-31 17:47:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:47:00,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:00,084 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:00,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:47:00,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash 801161228, now seen corresponding path program 9 times [2022-01-31 17:47:00,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974915169] [2022-01-31 17:47:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:00,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:00,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:00,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:00,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:00,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:00,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974915169] [2022-01-31 17:47:00,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974915169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:00,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:00,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:47:00,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834285277] [2022-01-31 17:47:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:00,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:47:00,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:47:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:47:00,172 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:00,308 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2022-01-31 17:47:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:47:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 17:47:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:00,309 INFO L225 Difference]: With dead ends: 113 [2022-01-31 17:47:00,309 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 17:47:00,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:47:00,310 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 141 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:00,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 27 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 17:47:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-01-31 17:47:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-01-31 17:47:00,317 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 60 [2022-01-31 17:47:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:00,317 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-01-31 17:47:00,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-01-31 17:47:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:47:00,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:00,317 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:00,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:47:00,317 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1531507558, now seen corresponding path program 10 times [2022-01-31 17:47:00,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:00,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603796733] [2022-01-31 17:47:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:00,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:00,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:00,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:00,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:00,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603796733] [2022-01-31 17:47:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603796733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:00,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:00,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:47:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500182218] [2022-01-31 17:47:00,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:00,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:47:00,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:47:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:47:00,416 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:00,616 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2022-01-31 17:47:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:47:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 17:47:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:00,617 INFO L225 Difference]: With dead ends: 121 [2022-01-31 17:47:00,617 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:47:00,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:47:00,617 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:00,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 37 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:47:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-01-31 17:47:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-01-31 17:47:00,624 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 65 [2022-01-31 17:47:00,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:00,624 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-01-31 17:47:00,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-01-31 17:47:00,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:47:00,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:00,625 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:00,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:47:00,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:00,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1270368080, now seen corresponding path program 11 times [2022-01-31 17:47:00,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:00,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332040812] [2022-01-31 17:47:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:00,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:00,627 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:00,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:00,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:00,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:00,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332040812] [2022-01-31 17:47:00,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332040812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:00,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:00,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:47:00,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336318104] [2022-01-31 17:47:00,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:00,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:47:00,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:00,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:47:00,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:47:00,763 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:01,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:01,005 INFO L93 Difference]: Finished difference Result 129 states and 158 transitions. [2022-01-31 17:47:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:47:01,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 17:47:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:01,006 INFO L225 Difference]: With dead ends: 129 [2022-01-31 17:47:01,006 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:47:01,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:47:01,007 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 169 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:01,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 32 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:47:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-01-31 17:47:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 74 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-01-31 17:47:01,015 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 70 [2022-01-31 17:47:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:01,015 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-01-31 17:47:01,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-01-31 17:47:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:47:01,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:01,016 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:01,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:47:01,016 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1070909474, now seen corresponding path program 12 times [2022-01-31 17:47:01,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:01,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580515057] [2022-01-31 17:47:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:01,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:01,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:01,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:01,019 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:01,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:01,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580515057] [2022-01-31 17:47:01,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580515057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:01,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:01,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:47:01,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268769178] [2022-01-31 17:47:01,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:01,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:47:01,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:47:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:47:01,162 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:01,398 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2022-01-31 17:47:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:47:01,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:47:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:01,398 INFO L225 Difference]: With dead ends: 137 [2022-01-31 17:47:01,399 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:47:01,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:47:01,399 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 189 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:01,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 32 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:47:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-01-31 17:47:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2022-01-31 17:47:01,407 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 75 [2022-01-31 17:47:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:01,407 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2022-01-31 17:47:01,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2022-01-31 17:47:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 17:47:01,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:01,407 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:01,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:47:01,408 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash 148579988, now seen corresponding path program 13 times [2022-01-31 17:47:01,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:01,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304469287] [2022-01-31 17:47:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:01,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:01,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:01,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:01,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:01,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:01,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304469287] [2022-01-31 17:47:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304469287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:01,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:01,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:47:01,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770354968] [2022-01-31 17:47:01,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:01,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:47:01,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:47:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:47:01,547 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:01,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:01,805 INFO L93 Difference]: Finished difference Result 145 states and 178 transitions. [2022-01-31 17:47:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:47:01,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 17:47:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:01,806 INFO L225 Difference]: With dead ends: 145 [2022-01-31 17:47:01,806 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:47:01,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:47:01,807 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 191 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:01,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 32 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:47:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-01-31 17:47:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-01-31 17:47:01,815 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 80 [2022-01-31 17:47:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:01,815 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-01-31 17:47:01,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-01-31 17:47:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:47:01,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:01,815 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:01,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:47:01,816 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:01,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1441717026, now seen corresponding path program 14 times [2022-01-31 17:47:01,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:01,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271153264] [2022-01-31 17:47:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:01,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:01,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:01,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:01,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:01,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:01,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:01,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271153264] [2022-01-31 17:47:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271153264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:01,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:01,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:47:01,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408012227] [2022-01-31 17:47:01,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:01,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:47:01,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:47:01,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:47:01,966 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:02,222 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2022-01-31 17:47:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:47:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 17:47:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:02,223 INFO L225 Difference]: With dead ends: 153 [2022-01-31 17:47:02,223 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:47:02,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:47:02,224 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 202 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:02,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 37 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:47:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-01-31 17:47:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2022-01-31 17:47:02,236 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 85 [2022-01-31 17:47:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:02,236 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2022-01-31 17:47:02,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2022-01-31 17:47:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 17:47:02,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:02,236 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:02,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:47:02,237 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash 791780824, now seen corresponding path program 15 times [2022-01-31 17:47:02,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:02,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580482325] [2022-01-31 17:47:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:02,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:02,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:02,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:02,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:02,387 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580482325] [2022-01-31 17:47:02,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [580482325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:02,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:02,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:47:02,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841284662] [2022-01-31 17:47:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:02,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:47:02,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:47:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:47:02,388 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:02,671 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2022-01-31 17:47:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:47:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 17:47:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:02,672 INFO L225 Difference]: With dead ends: 161 [2022-01-31 17:47:02,672 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 17:47:02,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:47:02,673 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:02,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 37 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 17:47:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-01-31 17:47:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.202127659574468) internal successors, (113), 94 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-01-31 17:47:02,681 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 90 [2022-01-31 17:47:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:02,682 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-01-31 17:47:02,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-01-31 17:47:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:47:02,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:02,682 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:02,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:47:02,682 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 234211738, now seen corresponding path program 16 times [2022-01-31 17:47:02,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:02,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975196519] [2022-01-31 17:47:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:02,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:02,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:02,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:02,687 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:02,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975196519] [2022-01-31 17:47:02,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [975196519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:02,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:02,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:47:02,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471905991] [2022-01-31 17:47:02,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:02,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:47:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:47:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:47:02,854 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:03,156 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2022-01-31 17:47:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:47:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:47:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:03,157 INFO L225 Difference]: With dead ends: 169 [2022-01-31 17:47:03,157 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:47:03,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:47:03,158 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 305 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:03,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 37 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:47:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2022-01-31 17:47:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 99 states have (on average 1.202020202020202) internal successors, (119), 99 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2022-01-31 17:47:03,167 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 95 [2022-01-31 17:47:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:03,167 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2022-01-31 17:47:03,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2022-01-31 17:47:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 17:47:03,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:03,168 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:03,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:47:03,168 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1077678820, now seen corresponding path program 17 times [2022-01-31 17:47:03,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:03,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515588096] [2022-01-31 17:47:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:03,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:03,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:03,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:03,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515588096] [2022-01-31 17:47:03,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515588096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:47:03,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907175673] [2022-01-31 17:47:03,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:47:03,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:47:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:47:03,355 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:03,690 INFO L93 Difference]: Finished difference Result 177 states and 218 transitions. [2022-01-31 17:47:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:47:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 17:47:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:03,691 INFO L225 Difference]: With dead ends: 177 [2022-01-31 17:47:03,691 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:47:03,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:47:03,691 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:03,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 42 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:47:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2022-01-31 17:47:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 104 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2022-01-31 17:47:03,701 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 100 [2022-01-31 17:47:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:03,702 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2022-01-31 17:47:03,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2022-01-31 17:47:03,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:47:03,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:03,702 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:03,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:47:03,702 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1148876374, now seen corresponding path program 18 times [2022-01-31 17:47:03,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:03,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933254708] [2022-01-31 17:47:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:03,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:03,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:03,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:03,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933254708] [2022-01-31 17:47:03,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933254708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:47:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403808477] [2022-01-31 17:47:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:47:03,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:47:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:47:03,884 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,220 INFO L93 Difference]: Finished difference Result 185 states and 228 transitions. [2022-01-31 17:47:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:47:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 17:47:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,221 INFO L225 Difference]: With dead ends: 185 [2022-01-31 17:47:04,221 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:47:04,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:47:04,223 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 339 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 32 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:47:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-01-31 17:47:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.201834862385321) internal successors, (131), 109 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2022-01-31 17:47:04,236 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 105 [2022-01-31 17:47:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,236 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2022-01-31 17:47:04,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2022-01-31 17:47:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 17:47:04,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,237 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:47:04,237 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1197845408, now seen corresponding path program 19 times [2022-01-31 17:47:04,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208001948] [2022-01-31 17:47:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,240 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:04,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208001948] [2022-01-31 17:47:04,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [208001948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:47:04,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460830310] [2022-01-31 17:47:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:47:04,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:47:04,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:47:04,449 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,815 INFO L93 Difference]: Finished difference Result 193 states and 238 transitions. [2022-01-31 17:47:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:47:04,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 17:47:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,816 INFO L225 Difference]: With dead ends: 193 [2022-01-31 17:47:04,816 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 17:47:04,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:47:04,817 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 278 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 32 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 17:47:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-01-31 17:47:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 114 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2022-01-31 17:47:04,828 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 110 [2022-01-31 17:47:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,828 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2022-01-31 17:47:04,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2022-01-31 17:47:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:47:04,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,829 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:47:04,829 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -946410734, now seen corresponding path program 20 times [2022-01-31 17:47:04,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732622189] [2022-01-31 17:47:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,831 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,831 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:05,034 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:05,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732622189] [2022-01-31 17:47:05,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732622189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:05,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:05,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:47:05,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257886350] [2022-01-31 17:47:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:05,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:47:05,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:47:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:47:05,036 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:05,409 INFO L93 Difference]: Finished difference Result 201 states and 248 transitions. [2022-01-31 17:47:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:47:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:47:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:05,411 INFO L225 Difference]: With dead ends: 201 [2022-01-31 17:47:05,411 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:47:05,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:47:05,412 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 298 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:05,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 37 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:47:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-01-31 17:47:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 119 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-01-31 17:47:05,427 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 115 [2022-01-31 17:47:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:05,427 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-01-31 17:47:05,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-01-31 17:47:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 17:47:05,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:05,428 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:05,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:47:05,428 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -658697308, now seen corresponding path program 21 times [2022-01-31 17:47:05,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:05,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607991272] [2022-01-31 17:47:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:05,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:05,430 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:05,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:05,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:05,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607991272] [2022-01-31 17:47:05,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [607991272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:05,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:05,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:47:05,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496163088] [2022-01-31 17:47:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:05,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:47:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:47:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:47:05,678 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:06,105 INFO L93 Difference]: Finished difference Result 209 states and 258 transitions. [2022-01-31 17:47:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:47:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 17:47:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:06,106 INFO L225 Difference]: With dead ends: 209 [2022-01-31 17:47:06,106 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 17:47:06,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:47:06,107 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:06,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 52 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 17:47:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2022-01-31 17:47:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2022-01-31 17:47:06,119 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 120 [2022-01-31 17:47:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:06,119 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2022-01-31 17:47:06,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2022-01-31 17:47:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:47:06,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:06,120 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:06,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:47:06,120 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash -297605170, now seen corresponding path program 22 times [2022-01-31 17:47:06,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775805754] [2022-01-31 17:47:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:06,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:06,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:06,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:06,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:06,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:06,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775805754] [2022-01-31 17:47:06,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [775805754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:06,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:06,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:47:06,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887712029] [2022-01-31 17:47:06,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:06,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:47:06,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:47:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:47:06,370 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:06,817 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2022-01-31 17:47:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:47:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 17:47:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:06,818 INFO L225 Difference]: With dead ends: 217 [2022-01-31 17:47:06,818 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:47:06,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:47:06,819 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 299 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:06,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:47:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2022-01-31 17:47:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 129 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2022-01-31 17:47:06,833 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 125 [2022-01-31 17:47:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:06,834 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2022-01-31 17:47:06,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2022-01-31 17:47:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 17:47:06,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:06,834 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:06,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:47:06,834 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1681156840, now seen corresponding path program 23 times [2022-01-31 17:47:06,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:06,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636142386] [2022-01-31 17:47:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:06,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:06,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:06,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:06,841 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:07,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636142386] [2022-01-31 17:47:07,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [636142386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:07,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:07,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:47:07,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708018626] [2022-01-31 17:47:07,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:07,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:47:07,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:47:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:47:07,094 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:07,584 INFO L93 Difference]: Finished difference Result 225 states and 278 transitions. [2022-01-31 17:47:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:47:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 17:47:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:07,588 INFO L225 Difference]: With dead ends: 225 [2022-01-31 17:47:07,588 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:47:07,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:47:07,590 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 361 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:07,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 37 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:47:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2022-01-31 17:47:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 134 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 166 transitions. [2022-01-31 17:47:07,607 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 166 transitions. Word has length 130 [2022-01-31 17:47:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:07,607 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 166 transitions. [2022-01-31 17:47:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 166 transitions. [2022-01-31 17:47:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:47:07,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:07,612 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:07,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:47:07,613 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash 678833290, now seen corresponding path program 24 times [2022-01-31 17:47:07,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:07,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502436548] [2022-01-31 17:47:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:07,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:07,615 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:07,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:07,616 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:07,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502436548] [2022-01-31 17:47:07,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502436548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:07,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:07,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:47:07,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522957787] [2022-01-31 17:47:07,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:07,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:47:07,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:47:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:47:07,904 INFO L87 Difference]: Start difference. First operand 140 states and 166 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:08,406 INFO L93 Difference]: Finished difference Result 233 states and 288 transitions. [2022-01-31 17:47:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:47:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:47:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:08,407 INFO L225 Difference]: With dead ends: 233 [2022-01-31 17:47:08,407 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:47:08,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:47:08,408 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 357 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:08,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 37 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:47:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2022-01-31 17:47:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 139 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2022-01-31 17:47:08,431 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 135 [2022-01-31 17:47:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:08,431 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2022-01-31 17:47:08,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2022-01-31 17:47:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 17:47:08,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:08,432 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:08,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:47:08,432 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash -402089428, now seen corresponding path program 25 times [2022-01-31 17:47:08,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:08,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351096590] [2022-01-31 17:47:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:08,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:08,434 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:08,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:08,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:08,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:08,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:08,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351096590] [2022-01-31 17:47:08,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [351096590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:08,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:08,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:47:08,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730768892] [2022-01-31 17:47:08,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:08,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:47:08,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:08,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:47:08,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:47:08,732 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:09,244 INFO L93 Difference]: Finished difference Result 241 states and 298 transitions. [2022-01-31 17:47:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:47:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 17:47:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:09,245 INFO L225 Difference]: With dead ends: 241 [2022-01-31 17:47:09,245 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 17:47:09,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:47:09,246 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 365 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 47 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 17:47:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2022-01-31 17:47:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 144 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 178 transitions. [2022-01-31 17:47:09,262 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 178 transitions. Word has length 140 [2022-01-31 17:47:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:09,262 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 178 transitions. [2022-01-31 17:47:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 178 transitions. [2022-01-31 17:47:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:47:09,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:09,263 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:09,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:47:09,263 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:09,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash 992508230, now seen corresponding path program 26 times [2022-01-31 17:47:09,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:09,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307130464] [2022-01-31 17:47:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:09,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:09,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:09,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:09,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:09,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:09,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307130464] [2022-01-31 17:47:09,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307130464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:09,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:09,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:47:09,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467561996] [2022-01-31 17:47:09,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:09,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:47:09,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:09,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:47:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:47:09,578 INFO L87 Difference]: Start difference. First operand 150 states and 178 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:10,098 INFO L93 Difference]: Finished difference Result 249 states and 308 transitions. [2022-01-31 17:47:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:47:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 17:47:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:10,099 INFO L225 Difference]: With dead ends: 249 [2022-01-31 17:47:10,099 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:47:10,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:47:10,101 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 436 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:10,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 32 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:47:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2022-01-31 17:47:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.2013422818791946) internal successors, (179), 149 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2022-01-31 17:47:10,118 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 145 [2022-01-31 17:47:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:10,118 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2022-01-31 17:47:10,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2022-01-31 17:47:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 17:47:10,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:10,120 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:10,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:47:10,120 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash -29236880, now seen corresponding path program 27 times [2022-01-31 17:47:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:10,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158497958] [2022-01-31 17:47:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:10,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:10,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:10,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:10,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:10,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:10,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158497958] [2022-01-31 17:47:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [158497958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:10,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:10,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:47:10,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496907818] [2022-01-31 17:47:10,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:10,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:47:10,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:47:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:47:10,470 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:11,038 INFO L93 Difference]: Finished difference Result 257 states and 318 transitions. [2022-01-31 17:47:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:47:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 17:47:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:11,040 INFO L225 Difference]: With dead ends: 257 [2022-01-31 17:47:11,040 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 17:47:11,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:47:11,042 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 393 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:11,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 42 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 17:47:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2022-01-31 17:47:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2022-01-31 17:47:11,060 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 150 [2022-01-31 17:47:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:11,060 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2022-01-31 17:47:11,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2022-01-31 17:47:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:47:11,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:11,061 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:11,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:47:11,061 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2085719554, now seen corresponding path program 28 times [2022-01-31 17:47:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:11,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019915528] [2022-01-31 17:47:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:11,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:11,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:11,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:11,064 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:11,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:11,417 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019915528] [2022-01-31 17:47:11,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019915528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:11,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:11,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:47:11,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156962836] [2022-01-31 17:47:11,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:47:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:47:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:47:11,419 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:12,037 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-01-31 17:47:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:47:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:47:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:12,038 INFO L225 Difference]: With dead ends: 265 [2022-01-31 17:47:12,039 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:47:12,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:47:12,040 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 413 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:12,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 42 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:47:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2022-01-31 17:47:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 159 states have (on average 1.20125786163522) internal successors, (191), 159 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2022-01-31 17:47:12,059 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 155 [2022-01-31 17:47:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:12,059 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2022-01-31 17:47:12,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2022-01-31 17:47:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 17:47:12,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:12,060 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:12,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:47:12,060 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash 300449972, now seen corresponding path program 29 times [2022-01-31 17:47:12,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:12,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857355102] [2022-01-31 17:47:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:12,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:12,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:12,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:12,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:12,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:12,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857355102] [2022-01-31 17:47:12,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857355102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:12,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:12,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:47:12,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219970585] [2022-01-31 17:47:12,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:12,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:47:12,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:47:12,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:47:12,433 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:13,105 INFO L93 Difference]: Finished difference Result 273 states and 338 transitions. [2022-01-31 17:47:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:47:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-01-31 17:47:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:13,106 INFO L225 Difference]: With dead ends: 273 [2022-01-31 17:47:13,106 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:47:13,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:47:13,107 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 397 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:13,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 52 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:47:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2022-01-31 17:47:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.201219512195122) internal successors, (197), 164 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 202 transitions. [2022-01-31 17:47:13,126 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 202 transitions. Word has length 160 [2022-01-31 17:47:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:13,126 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 202 transitions. [2022-01-31 17:47:13,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 202 transitions. [2022-01-31 17:47:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:47:13,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:13,127 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:13,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:47:13,127 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 250161854, now seen corresponding path program 30 times [2022-01-31 17:47:13,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:13,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722245657] [2022-01-31 17:47:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:13,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:13,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:13,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:13,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:13,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:13,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722245657] [2022-01-31 17:47:13,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722245657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:13,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:13,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:47:13,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524109875] [2022-01-31 17:47:13,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:13,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:47:13,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:47:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:47:13,492 INFO L87 Difference]: Start difference. First operand 170 states and 202 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:14,123 INFO L93 Difference]: Finished difference Result 281 states and 348 transitions. [2022-01-31 17:47:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:47:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 17:47:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:14,125 INFO L225 Difference]: With dead ends: 281 [2022-01-31 17:47:14,125 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:47:14,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:47:14,126 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 468 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:14,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 42 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:47:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-01-31 17:47:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 169 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2022-01-31 17:47:14,147 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 165 [2022-01-31 17:47:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:14,147 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2022-01-31 17:47:14,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2022-01-31 17:47:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 17:47:14,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:14,148 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:14,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:47:14,148 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash 587511800, now seen corresponding path program 31 times [2022-01-31 17:47:14,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:14,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944596607] [2022-01-31 17:47:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:14,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:14,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:14,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:14,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:14,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:14,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944596607] [2022-01-31 17:47:14,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944596607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:14,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:14,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:47:14,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962637980] [2022-01-31 17:47:14,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:14,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:47:14,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:14,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:47:14,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:47:14,574 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:15,256 INFO L93 Difference]: Finished difference Result 289 states and 358 transitions. [2022-01-31 17:47:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:47:15,257 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 17:47:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:15,257 INFO L225 Difference]: With dead ends: 289 [2022-01-31 17:47:15,258 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 17:47:15,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:47:15,259 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 461 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:15,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 42 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 17:47:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-01-31 17:47:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 174 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-01-31 17:47:15,280 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 170 [2022-01-31 17:47:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:15,281 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-01-31 17:47:15,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-01-31 17:47:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:47:15,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:15,281 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:15,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:47:15,282 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash 518459258, now seen corresponding path program 32 times [2022-01-31 17:47:15,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082212240] [2022-01-31 17:47:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:15,283 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:15,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:15,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:15,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:15,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082212240] [2022-01-31 17:47:15,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082212240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:15,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:15,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:47:15,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508534504] [2022-01-31 17:47:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:15,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:47:15,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:47:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:47:15,708 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:16,418 INFO L93 Difference]: Finished difference Result 297 states and 368 transitions. [2022-01-31 17:47:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:47:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:47:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:16,419 INFO L225 Difference]: With dead ends: 297 [2022-01-31 17:47:16,419 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 17:47:16,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:47:16,420 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 523 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:16,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 32 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 17:47:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-01-31 17:47:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 179 states have (on average 1.2011173184357542) internal successors, (215), 179 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 220 transitions. [2022-01-31 17:47:16,443 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 220 transitions. Word has length 175 [2022-01-31 17:47:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:16,443 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 220 transitions. [2022-01-31 17:47:16,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 220 transitions. [2022-01-31 17:47:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 17:47:16,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:16,444 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:16,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:47:16,444 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1969305796, now seen corresponding path program 33 times [2022-01-31 17:47:16,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964047295] [2022-01-31 17:47:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:16,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:16,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:16,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:16,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:16,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:16,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964047295] [2022-01-31 17:47:16,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964047295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:16,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:16,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:47:16,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469917710] [2022-01-31 17:47:16,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:16,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:47:16,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:47:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:47:16,978 INFO L87 Difference]: Start difference. First operand 185 states and 220 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:17,695 INFO L93 Difference]: Finished difference Result 305 states and 378 transitions. [2022-01-31 17:47:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:47:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-01-31 17:47:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:17,696 INFO L225 Difference]: With dead ends: 305 [2022-01-31 17:47:17,696 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 17:47:17,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:47:17,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 624 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:17,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 32 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 17:47:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-01-31 17:47:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.201086956521739) internal successors, (221), 184 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2022-01-31 17:47:17,723 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 180 [2022-01-31 17:47:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:17,723 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2022-01-31 17:47:17,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2022-01-31 17:47:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:47:17,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:17,723 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:17,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:47:17,724 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:17,724 INFO L85 PathProgramCache]: Analyzing trace with hash 490929206, now seen corresponding path program 34 times [2022-01-31 17:47:17,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:17,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005693057] [2022-01-31 17:47:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:17,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:17,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:17,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:17,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:18,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005693057] [2022-01-31 17:47:18,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005693057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:18,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:18,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:47:18,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571185632] [2022-01-31 17:47:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:18,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:47:18,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:47:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:47:18,201 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:18,970 INFO L93 Difference]: Finished difference Result 313 states and 388 transitions. [2022-01-31 17:47:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:47:18,970 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 17:47:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:18,971 INFO L225 Difference]: With dead ends: 313 [2022-01-31 17:47:18,971 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:47:18,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:47:18,972 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 485 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:18,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 52 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:47:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2022-01-31 17:47:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.2010582010582012) internal successors, (227), 189 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 232 transitions. [2022-01-31 17:47:19,001 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 232 transitions. Word has length 185 [2022-01-31 17:47:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:19,001 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 232 transitions. [2022-01-31 17:47:19,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 232 transitions. [2022-01-31 17:47:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 17:47:19,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:19,002 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:47:19,002 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1094783360, now seen corresponding path program 35 times [2022-01-31 17:47:19,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:19,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354699424] [2022-01-31 17:47:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:19,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:19,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:19,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:19,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:19,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:19,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354699424] [2022-01-31 17:47:19,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354699424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:19,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:19,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:47:19,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624488779] [2022-01-31 17:47:19,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:19,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:47:19,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:47:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:47:19,510 INFO L87 Difference]: Start difference. First operand 195 states and 232 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:20,325 INFO L93 Difference]: Finished difference Result 321 states and 398 transitions. [2022-01-31 17:47:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:47:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 17:47:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:20,335 INFO L225 Difference]: With dead ends: 321 [2022-01-31 17:47:20,335 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:47:20,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:47:20,337 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 490 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:20,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 47 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:47:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2022-01-31 17:47:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.2010309278350515) internal successors, (233), 194 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 238 transitions. [2022-01-31 17:47:20,371 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 238 transitions. Word has length 190 [2022-01-31 17:47:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:20,371 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 238 transitions. [2022-01-31 17:47:20,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 238 transitions. [2022-01-31 17:47:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:47:20,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:20,373 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:20,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:47:20,373 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -67849998, now seen corresponding path program 36 times [2022-01-31 17:47:20,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473056832] [2022-01-31 17:47:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:20,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:20,383 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:20,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:20,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:20,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473056832] [2022-01-31 17:47:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473056832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:20,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:20,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:47:20,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386622383] [2022-01-31 17:47:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:20,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:47:20,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:47:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:47:20,904 INFO L87 Difference]: Start difference. First operand 200 states and 238 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:21,760 INFO L93 Difference]: Finished difference Result 329 states and 408 transitions. [2022-01-31 17:47:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:47:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:47:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:21,761 INFO L225 Difference]: With dead ends: 329 [2022-01-31 17:47:21,761 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:47:21,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:47:21,762 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 573 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:21,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 42 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:47:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2022-01-31 17:47:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.2010050251256281) internal successors, (239), 199 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2022-01-31 17:47:21,799 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 195 [2022-01-31 17:47:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2022-01-31 17:47:21,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2022-01-31 17:47:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 17:47:21,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:21,800 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:21,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:47:21,800 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash 376270276, now seen corresponding path program 37 times [2022-01-31 17:47:21,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:21,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569699566] [2022-01-31 17:47:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:21,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:21,802 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:21,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:21,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:22,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:22,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569699566] [2022-01-31 17:47:22,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569699566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:22,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:22,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:47:22,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974765684] [2022-01-31 17:47:22,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:22,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:47:22,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:47:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:47:22,321 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:23,209 INFO L93 Difference]: Finished difference Result 337 states and 418 transitions. [2022-01-31 17:47:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:47:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-01-31 17:47:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:23,215 INFO L225 Difference]: With dead ends: 337 [2022-01-31 17:47:23,215 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 17:47:23,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:47:23,216 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:23,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 57 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 17:47:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2022-01-31 17:47:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.2009803921568627) internal successors, (245), 204 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 250 transitions. [2022-01-31 17:47:23,245 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 250 transitions. Word has length 200 [2022-01-31 17:47:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:23,245 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 250 transitions. [2022-01-31 17:47:23,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 250 transitions. [2022-01-31 17:47:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:47:23,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:23,246 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:23,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:47:23,246 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:23,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1777593774, now seen corresponding path program 38 times [2022-01-31 17:47:23,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923781051] [2022-01-31 17:47:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:23,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:23,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:23,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:23,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:23,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:23,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923781051] [2022-01-31 17:47:23,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923781051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:23,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:23,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:47:23,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433393595] [2022-01-31 17:47:23,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:23,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:47:23,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:47:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:47:23,836 INFO L87 Difference]: Start difference. First operand 210 states and 250 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:24,717 INFO L93 Difference]: Finished difference Result 345 states and 428 transitions. [2022-01-31 17:47:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:47:24,718 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 17:47:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:24,718 INFO L225 Difference]: With dead ends: 345 [2022-01-31 17:47:24,718 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 17:47:24,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:47:24,720 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 541 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:24,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 42 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 17:47:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2022-01-31 17:47:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 209 states have (on average 1.200956937799043) internal successors, (251), 209 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 256 transitions. [2022-01-31 17:47:24,752 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 256 transitions. Word has length 205 [2022-01-31 17:47:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:24,752 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 256 transitions. [2022-01-31 17:47:24,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 256 transitions. [2022-01-31 17:47:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 17:47:24,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:24,753 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:24,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:47:24,753 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1917680376, now seen corresponding path program 39 times [2022-01-31 17:47:24,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:24,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649187256] [2022-01-31 17:47:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:24,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:24,755 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:24,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:24,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:25,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:25,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:25,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649187256] [2022-01-31 17:47:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649187256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:25,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:25,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:47:25,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146124952] [2022-01-31 17:47:25,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:25,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:47:25,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:47:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:47:25,363 INFO L87 Difference]: Start difference. First operand 215 states and 256 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:26,314 INFO L93 Difference]: Finished difference Result 353 states and 438 transitions. [2022-01-31 17:47:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:47:26,314 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 17:47:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:26,315 INFO L225 Difference]: With dead ends: 353 [2022-01-31 17:47:26,315 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:47:26,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:47:26,316 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 909 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:26,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 27 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:47:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2022-01-31 17:47:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.2009345794392523) internal successors, (257), 214 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 262 transitions. [2022-01-31 17:47:26,347 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 262 transitions. Word has length 210 [2022-01-31 17:47:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 262 transitions. [2022-01-31 17:47:26,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 262 transitions. [2022-01-31 17:47:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:47:26,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:26,348 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:26,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:47:26,349 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash 255357546, now seen corresponding path program 40 times [2022-01-31 17:47:26,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:26,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363000397] [2022-01-31 17:47:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:26,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:26,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:26,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:26,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:26,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363000397] [2022-01-31 17:47:26,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363000397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:26,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:26,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:47:26,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128250694] [2022-01-31 17:47:26,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:26,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:47:26,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:47:26,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:47:26,975 INFO L87 Difference]: Start difference. First operand 220 states and 262 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:27,937 INFO L93 Difference]: Finished difference Result 361 states and 448 transitions. [2022-01-31 17:47:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:47:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:47:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:27,938 INFO L225 Difference]: With dead ends: 361 [2022-01-31 17:47:27,938 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 17:47:27,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:47:27,939 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 611 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:27,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 47 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 17:47:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2022-01-31 17:47:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 219 states have (on average 1.2009132420091324) internal successors, (263), 219 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 268 transitions. [2022-01-31 17:47:27,973 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 268 transitions. Word has length 215 [2022-01-31 17:47:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:27,973 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 268 transitions. [2022-01-31 17:47:27,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 268 transitions. [2022-01-31 17:47:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 17:47:27,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:27,974 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:27,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:47:27,974 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1986628532, now seen corresponding path program 41 times [2022-01-31 17:47:27,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:27,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400216834] [2022-01-31 17:47:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:27,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:27,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:27,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:27,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:28,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:28,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400216834] [2022-01-31 17:47:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400216834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:28,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:47:28,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706137787] [2022-01-31 17:47:28,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:47:28,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:47:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:47:28,632 INFO L87 Difference]: Start difference. First operand 225 states and 268 transitions. Second operand has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:29,662 INFO L93 Difference]: Finished difference Result 369 states and 458 transitions. [2022-01-31 17:47:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:47:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2022-01-31 17:47:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:29,663 INFO L225 Difference]: With dead ends: 369 [2022-01-31 17:47:29,663 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:47:29,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:47:29,670 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 796 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:29,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 47 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:47:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2022-01-31 17:47:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.2008928571428572) internal successors, (269), 224 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 274 transitions. [2022-01-31 17:47:29,707 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 274 transitions. Word has length 220 [2022-01-31 17:47:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:29,708 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 274 transitions. [2022-01-31 17:47:29,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 274 transitions. [2022-01-31 17:47:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:47:29,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:29,709 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:29,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:47:29,709 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash -927334618, now seen corresponding path program 42 times [2022-01-31 17:47:29,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421137137] [2022-01-31 17:47:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:29,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:29,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:29,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:29,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421137137] [2022-01-31 17:47:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421137137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:47:30,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396173272] [2022-01-31 17:47:30,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:47:30,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:47:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:47:30,350 INFO L87 Difference]: Start difference. First operand 230 states and 274 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:31,389 INFO L93 Difference]: Finished difference Result 377 states and 468 transitions. [2022-01-31 17:47:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:47:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 17:47:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:31,390 INFO L225 Difference]: With dead ends: 377 [2022-01-31 17:47:31,391 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 17:47:31,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:47:31,392 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 579 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:31,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 57 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 17:47:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2022-01-31 17:47:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.2008733624454149) internal successors, (275), 229 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 280 transitions. [2022-01-31 17:47:31,433 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 280 transitions. Word has length 225 [2022-01-31 17:47:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:31,434 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 280 transitions. [2022-01-31 17:47:31,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 280 transitions. [2022-01-31 17:47:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 17:47:31,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:31,435 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:31,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:47:31,435 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1675527280, now seen corresponding path program 43 times [2022-01-31 17:47:31,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:31,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044887419] [2022-01-31 17:47:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:31,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:31,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:31,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:31,439 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:32,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044887419] [2022-01-31 17:47:32,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044887419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:32,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:32,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:47:32,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248651796] [2022-01-31 17:47:32,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:32,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:47:32,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:47:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:47:32,154 INFO L87 Difference]: Start difference. First operand 235 states and 280 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:33,206 INFO L93 Difference]: Finished difference Result 385 states and 478 transitions. [2022-01-31 17:47:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:47:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 17:47:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:33,207 INFO L225 Difference]: With dead ends: 385 [2022-01-31 17:47:33,208 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 17:47:33,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:47:33,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 605 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:33,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 42 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 17:47:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2022-01-31 17:47:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.2008547008547008) internal successors, (281), 234 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 286 transitions. [2022-01-31 17:47:33,246 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 286 transitions. Word has length 230 [2022-01-31 17:47:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:33,246 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 286 transitions. [2022-01-31 17:47:33,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 286 transitions. [2022-01-31 17:47:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:47:33,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:33,247 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:33,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:47:33,247 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -462400542, now seen corresponding path program 44 times [2022-01-31 17:47:33,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013392734] [2022-01-31 17:47:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:33,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:33,249 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:33,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:33,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:33,990 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013392734] [2022-01-31 17:47:33,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013392734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:33,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:33,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:47:33,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769569793] [2022-01-31 17:47:33,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:33,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:47:33,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:47:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:47:33,992 INFO L87 Difference]: Start difference. First operand 240 states and 286 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:35,116 INFO L93 Difference]: Finished difference Result 393 states and 488 transitions. [2022-01-31 17:47:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:47:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:47:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:35,117 INFO L225 Difference]: With dead ends: 393 [2022-01-31 17:47:35,118 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 17:47:35,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:47:35,118 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 715 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:35,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 42 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 17:47:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2022-01-31 17:47:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.200836820083682) internal successors, (287), 239 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2022-01-31 17:47:35,157 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 235 [2022-01-31 17:47:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:35,157 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2022-01-31 17:47:35,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2022-01-31 17:47:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 17:47:35,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:35,158 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:35,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:47:35,158 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1213979348, now seen corresponding path program 45 times [2022-01-31 17:47:35,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:35,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407240938] [2022-01-31 17:47:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:35,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:35,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:35,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:35,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:35,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:35,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407240938] [2022-01-31 17:47:35,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [407240938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:35,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:35,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:47:35,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774593896] [2022-01-31 17:47:35,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:35,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:47:35,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:35,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:47:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:47:35,922 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:37,112 INFO L93 Difference]: Finished difference Result 401 states and 498 transitions. [2022-01-31 17:47:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:47:37,113 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2022-01-31 17:47:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:37,114 INFO L225 Difference]: With dead ends: 401 [2022-01-31 17:47:37,114 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:47:37,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:47:37,114 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 759 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:37,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 47 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:47:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2022-01-31 17:47:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.2008196721311475) internal successors, (293), 244 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 298 transitions. [2022-01-31 17:47:37,159 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 298 transitions. Word has length 240 [2022-01-31 17:47:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:37,160 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 298 transitions. [2022-01-31 17:47:37,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 298 transitions. [2022-01-31 17:47:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:47:37,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:37,161 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:37,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:47:37,161 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1565733022, now seen corresponding path program 46 times [2022-01-31 17:47:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133505498] [2022-01-31 17:47:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:37,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:37,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:37,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:37,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:37,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133505498] [2022-01-31 17:47:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133505498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:37,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:37,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:47:37,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366903019] [2022-01-31 17:47:37,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:37,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:47:37,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:47:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:47:37,956 INFO L87 Difference]: Start difference. First operand 250 states and 298 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:39,164 INFO L93 Difference]: Finished difference Result 409 states and 508 transitions. [2022-01-31 17:47:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:47:39,165 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 17:47:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:39,165 INFO L225 Difference]: With dead ends: 409 [2022-01-31 17:47:39,165 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:47:39,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:47:39,166 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 809 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:39,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 37 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:47:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2022-01-31 17:47:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.2008032128514057) internal successors, (299), 249 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 304 transitions. [2022-01-31 17:47:39,208 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 304 transitions. Word has length 245 [2022-01-31 17:47:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:39,209 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 304 transitions. [2022-01-31 17:47:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 304 transitions. [2022-01-31 17:47:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 17:47:39,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:39,210 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:39,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:47:39,210 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash -967978472, now seen corresponding path program 47 times [2022-01-31 17:47:39,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:39,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270445325] [2022-01-31 17:47:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:39,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:39,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:39,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:39,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:40,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270445325] [2022-01-31 17:47:40,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1270445325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:40,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:40,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:47:40,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43753828] [2022-01-31 17:47:40,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:40,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:47:40,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:47:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:47:40,165 INFO L87 Difference]: Start difference. First operand 255 states and 304 transitions. Second operand has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:41,413 INFO L93 Difference]: Finished difference Result 417 states and 518 transitions. [2022-01-31 17:47:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:47:41,413 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-01-31 17:47:41,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:41,414 INFO L225 Difference]: With dead ends: 417 [2022-01-31 17:47:41,414 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:47:41,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:47:41,415 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 808 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:41,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 32 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:47:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-01-31 17:47:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.2007874015748032) internal successors, (305), 254 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 310 transitions. [2022-01-31 17:47:41,459 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 310 transitions. Word has length 250 [2022-01-31 17:47:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:41,460 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 310 transitions. [2022-01-31 17:47:41,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 310 transitions. [2022-01-31 17:47:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:47:41,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:41,461 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:41,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:47:41,461 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 391796058, now seen corresponding path program 48 times [2022-01-31 17:47:41,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:41,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141792695] [2022-01-31 17:47:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:41,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:41,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:41,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:41,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:42,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:42,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141792695] [2022-01-31 17:47:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [141792695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:42,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:47:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952479806] [2022-01-31 17:47:42,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:47:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:47:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:47:42,282 INFO L87 Difference]: Start difference. First operand 260 states and 310 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:43,575 INFO L93 Difference]: Finished difference Result 425 states and 528 transitions. [2022-01-31 17:47:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:47:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:47:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:43,576 INFO L225 Difference]: With dead ends: 425 [2022-01-31 17:47:43,576 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 17:47:43,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:47:43,577 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 657 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:43,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 57 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 17:47:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 265. [2022-01-31 17:47:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.2007722007722008) internal successors, (311), 259 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 316 transitions. [2022-01-31 17:47:43,623 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 316 transitions. Word has length 255 [2022-01-31 17:47:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:43,623 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 316 transitions. [2022-01-31 17:47:43,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 316 transitions. [2022-01-31 17:47:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 17:47:43,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:43,624 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:43,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:47:43,625 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash -956325540, now seen corresponding path program 49 times [2022-01-31 17:47:43,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:43,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548933385] [2022-01-31 17:47:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:43,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:43,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:43,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:43,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:44,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548933385] [2022-01-31 17:47:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548933385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:44,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:44,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:47:44,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054117964] [2022-01-31 17:47:44,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:44,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:47:44,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:47:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:47:44,520 INFO L87 Difference]: Start difference. First operand 265 states and 316 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:45,850 INFO L93 Difference]: Finished difference Result 433 states and 538 transitions. [2022-01-31 17:47:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:47:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-01-31 17:47:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:45,851 INFO L225 Difference]: With dead ends: 433 [2022-01-31 17:47:45,851 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 17:47:45,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:47:45,852 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 728 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:45,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 47 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 17:47:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2022-01-31 17:47:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.2007575757575757) internal successors, (317), 264 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 322 transitions. [2022-01-31 17:47:45,900 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 322 transitions. Word has length 260 [2022-01-31 17:47:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:45,901 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 322 transitions. [2022-01-31 17:47:45,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 322 transitions. [2022-01-31 17:47:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:47:45,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:45,902 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:45,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:47:45,902 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash 461210134, now seen corresponding path program 50 times [2022-01-31 17:47:45,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:45,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325945049] [2022-01-31 17:47:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:45,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:45,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:45,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:45,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:46,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325945049] [2022-01-31 17:47:46,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325945049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:46,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:46,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:47:46,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001740292] [2022-01-31 17:47:46,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:46,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:47:46,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:47:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:47:46,756 INFO L87 Difference]: Start difference. First operand 270 states and 322 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:48,141 INFO L93 Difference]: Finished difference Result 441 states and 548 transitions. [2022-01-31 17:47:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:47:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 17:47:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:48,143 INFO L225 Difference]: With dead ends: 441 [2022-01-31 17:47:48,143 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 17:47:48,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:47:48,144 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 877 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:48,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 52 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 17:47:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-01-31 17:47:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.2007434944237918) internal successors, (323), 269 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 328 transitions. [2022-01-31 17:47:48,193 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 328 transitions. Word has length 265 [2022-01-31 17:47:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:48,194 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 328 transitions. [2022-01-31 17:47:48,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 328 transitions. [2022-01-31 17:47:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 17:47:48,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:48,195 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:48,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:47:48,195 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash 947488928, now seen corresponding path program 51 times [2022-01-31 17:47:48,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718225066] [2022-01-31 17:47:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:48,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:48,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:48,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:48,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:49,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:49,081 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718225066] [2022-01-31 17:47:49,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [718225066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:49,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:49,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:47:49,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102549746] [2022-01-31 17:47:49,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:47:49,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:47:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:47:49,082 INFO L87 Difference]: Start difference. First operand 275 states and 328 transitions. Second operand has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:50,520 INFO L93 Difference]: Finished difference Result 449 states and 558 transitions. [2022-01-31 17:47:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:47:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 17:47:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:50,522 INFO L225 Difference]: With dead ends: 449 [2022-01-31 17:47:50,522 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 17:47:50,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:47:50,523 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 849 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:50,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 37 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 17:47:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2022-01-31 17:47:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.2007299270072993) internal successors, (329), 274 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 334 transitions. [2022-01-31 17:47:50,587 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 334 transitions. Word has length 270 [2022-01-31 17:47:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:50,588 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 334 transitions. [2022-01-31 17:47:50,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 334 transitions. [2022-01-31 17:47:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:47:50,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:50,589 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:50,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:47:50,589 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -743147822, now seen corresponding path program 52 times [2022-01-31 17:47:50,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:50,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544698124] [2022-01-31 17:47:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:50,591 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:50,591 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:50,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:51,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:51,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544698124] [2022-01-31 17:47:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544698124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:51,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:51,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:47:51,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86421300] [2022-01-31 17:47:51,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:47:51,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:47:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:47:51,522 INFO L87 Difference]: Start difference. First operand 280 states and 334 transitions. Second operand has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:53,015 INFO L93 Difference]: Finished difference Result 457 states and 568 transitions. [2022-01-31 17:47:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:47:53,015 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:47:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:53,016 INFO L225 Difference]: With dead ends: 457 [2022-01-31 17:47:53,016 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:47:53,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:47:53,017 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 866 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:53,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 42 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:47:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 285. [2022-01-31 17:47:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 279 states have (on average 1.200716845878136) internal successors, (335), 279 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 340 transitions. [2022-01-31 17:47:53,069 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 340 transitions. Word has length 275 [2022-01-31 17:47:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 340 transitions. [2022-01-31 17:47:53,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 340 transitions. [2022-01-31 17:47:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 17:47:53,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:53,070 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:53,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:47:53,070 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 163825636, now seen corresponding path program 53 times [2022-01-31 17:47:53,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:53,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102034045] [2022-01-31 17:47:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:53,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:53,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:53,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:53,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:54,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:54,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102034045] [2022-01-31 17:47:54,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102034045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:54,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:54,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:47:54,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191548955] [2022-01-31 17:47:54,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:47:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:47:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:47:54,011 INFO L87 Difference]: Start difference. First operand 285 states and 340 transitions. Second operand has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:55,530 INFO L93 Difference]: Finished difference Result 465 states and 578 transitions. [2022-01-31 17:47:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:47:55,530 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2022-01-31 17:47:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:55,531 INFO L225 Difference]: With dead ends: 465 [2022-01-31 17:47:55,531 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:47:55,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:47:55,532 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 979 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:55,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 32 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:47:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2022-01-31 17:47:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.2007042253521127) internal successors, (341), 284 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 346 transitions. [2022-01-31 17:47:55,591 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 346 transitions. Word has length 280 [2022-01-31 17:47:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:55,591 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 346 transitions. [2022-01-31 17:47:55,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 346 transitions. [2022-01-31 17:47:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:47:55,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:55,592 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:55,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:47:55,592 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1190589326, now seen corresponding path program 54 times [2022-01-31 17:47:55,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836062600] [2022-01-31 17:47:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:55,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:55,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:55,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:55,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:56,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:56,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:56,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836062600] [2022-01-31 17:47:56,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836062600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:56,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:56,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:47:56,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127527938] [2022-01-31 17:47:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:56,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:47:56,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:56,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:47:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:47:56,568 INFO L87 Difference]: Start difference. First operand 290 states and 346 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:58,143 INFO L93 Difference]: Finished difference Result 473 states and 588 transitions. [2022-01-31 17:47:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:47:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 17:47:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:58,144 INFO L225 Difference]: With dead ends: 473 [2022-01-31 17:47:58,144 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 17:47:58,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:47:58,145 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 969 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:58,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 42 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 17:47:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-01-31 17:47:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2006920415224913) internal successors, (347), 289 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 352 transitions. [2022-01-31 17:47:58,207 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 352 transitions. Word has length 285 [2022-01-31 17:47:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:58,207 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 352 transitions. [2022-01-31 17:47:58,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 352 transitions. [2022-01-31 17:47:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 17:47:58,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:58,208 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:58,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:47:58,209 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -286875864, now seen corresponding path program 55 times [2022-01-31 17:47:58,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:58,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113948771] [2022-01-31 17:47:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:58,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:58,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:58,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:58,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:59,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:59,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113948771] [2022-01-31 17:47:59,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113948771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:59,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:59,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:47:59,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996917501] [2022-01-31 17:47:59,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:59,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:47:59,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:47:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:47:59,226 INFO L87 Difference]: Start difference. First operand 295 states and 352 transitions. Second operand has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:00,880 INFO L93 Difference]: Finished difference Result 481 states and 598 transitions. [2022-01-31 17:48:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:48:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-01-31 17:48:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:00,881 INFO L225 Difference]: With dead ends: 481 [2022-01-31 17:48:00,881 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 17:48:00,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:48:00,882 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 875 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:00,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 47 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 17:48:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 300. [2022-01-31 17:48:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.2006802721088434) internal successors, (353), 294 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 358 transitions. [2022-01-31 17:48:00,942 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 358 transitions. Word has length 290 [2022-01-31 17:48:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:00,942 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 358 transitions. [2022-01-31 17:48:00,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 358 transitions. [2022-01-31 17:48:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:48:00,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:00,943 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:00,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:48:00,943 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1430042698, now seen corresponding path program 56 times [2022-01-31 17:48:00,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805523760] [2022-01-31 17:48:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:00,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:00,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:00,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:00,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:02,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805523760] [2022-01-31 17:48:02,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [805523760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:02,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:02,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:48:02,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432574349] [2022-01-31 17:48:02,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:02,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:48:02,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:48:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:48:02,031 INFO L87 Difference]: Start difference. First operand 300 states and 358 transitions. Second operand has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:03,725 INFO L93 Difference]: Finished difference Result 489 states and 608 transitions. [2022-01-31 17:48:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:48:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:48:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:03,726 INFO L225 Difference]: With dead ends: 489 [2022-01-31 17:48:03,727 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 17:48:03,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:48:03,741 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 781 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:03,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 52 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 17:48:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 305. [2022-01-31 17:48:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 299 states have (on average 1.2006688963210703) internal successors, (359), 299 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 364 transitions. [2022-01-31 17:48:03,816 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 364 transitions. Word has length 295 [2022-01-31 17:48:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:03,816 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 364 transitions. [2022-01-31 17:48:03,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 364 transitions. [2022-01-31 17:48:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 17:48:03,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:03,817 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:03,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:48:03,818 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 619335276, now seen corresponding path program 57 times [2022-01-31 17:48:03,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:03,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906107822] [2022-01-31 17:48:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:03,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:03,819 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:03,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:03,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:04,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:04,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906107822] [2022-01-31 17:48:04,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [906107822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:04,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:04,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:48:04,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105184953] [2022-01-31 17:48:04,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:04,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:48:04,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:48:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:48:04,923 INFO L87 Difference]: Start difference. First operand 305 states and 364 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:06,702 INFO L93 Difference]: Finished difference Result 497 states and 618 transitions. [2022-01-31 17:48:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:48:06,702 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-01-31 17:48:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:06,703 INFO L225 Difference]: With dead ends: 497 [2022-01-31 17:48:06,703 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 17:48:06,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:48:06,704 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1134 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:06,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 32 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 17:48:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-01-31 17:48:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.200657894736842) internal successors, (365), 304 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 370 transitions. [2022-01-31 17:48:06,768 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 370 transitions. Word has length 300 [2022-01-31 17:48:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:06,768 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 370 transitions. [2022-01-31 17:48:06,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 370 transitions. [2022-01-31 17:48:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:48:06,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:06,769 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:06,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:48:06,769 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -209877754, now seen corresponding path program 58 times [2022-01-31 17:48:06,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:06,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880470836] [2022-01-31 17:48:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:06,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:06,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:06,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:06,773 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:07,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:07,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880470836] [2022-01-31 17:48:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880470836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:07,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:07,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:48:07,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334731856] [2022-01-31 17:48:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:07,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:48:07,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:07,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:48:07,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:48:07,897 INFO L87 Difference]: Start difference. First operand 310 states and 370 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:09,711 INFO L93 Difference]: Finished difference Result 505 states and 628 transitions. [2022-01-31 17:48:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:48:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 17:48:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:09,712 INFO L225 Difference]: With dead ends: 505 [2022-01-31 17:48:09,712 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 17:48:09,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:48:09,713 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1013 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:09,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 42 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 17:48:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 315. [2022-01-31 17:48:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.2006472491909386) internal successors, (371), 309 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 376 transitions. [2022-01-31 17:48:09,777 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 376 transitions. Word has length 305 [2022-01-31 17:48:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:09,777 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 376 transitions. [2022-01-31 17:48:09,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 376 transitions. [2022-01-31 17:48:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 17:48:09,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:09,778 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:09,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:48:09,778 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash 903288240, now seen corresponding path program 59 times [2022-01-31 17:48:09,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:09,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702657303] [2022-01-31 17:48:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:09,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:09,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:09,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:09,782 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:10,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702657303] [2022-01-31 17:48:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702657303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:10,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:10,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:48:10,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678609358] [2022-01-31 17:48:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:10,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:48:10,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:48:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:48:10,925 INFO L87 Difference]: Start difference. First operand 315 states and 376 transitions. Second operand has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:12,806 INFO L93 Difference]: Finished difference Result 513 states and 638 transitions. [2022-01-31 17:48:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:48:12,807 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 17:48:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:12,808 INFO L225 Difference]: With dead ends: 513 [2022-01-31 17:48:12,808 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 17:48:12,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:48:12,809 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1039 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:12,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 37 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 17:48:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2022-01-31 17:48:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.2006369426751593) internal successors, (377), 314 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 382 transitions. [2022-01-31 17:48:12,880 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 382 transitions. Word has length 310 [2022-01-31 17:48:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:12,880 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 382 transitions. [2022-01-31 17:48:12,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 382 transitions. [2022-01-31 17:48:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:48:12,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:12,881 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:12,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:48:12,881 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1739659714, now seen corresponding path program 60 times [2022-01-31 17:48:12,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:12,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874303865] [2022-01-31 17:48:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:12,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:12,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:12,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:12,885 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:14,047 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874303865] [2022-01-31 17:48:14,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874303865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:14,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:14,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:48:14,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356081525] [2022-01-31 17:48:14,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:14,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:48:14,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:48:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:48:14,049 INFO L87 Difference]: Start difference. First operand 320 states and 382 transitions. Second operand has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:15,928 INFO L93 Difference]: Finished difference Result 521 states and 648 transitions. [2022-01-31 17:48:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:48:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:48:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:15,929 INFO L225 Difference]: With dead ends: 521 [2022-01-31 17:48:15,929 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:48:15,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:48:15,930 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 981 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:15,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 42 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:48:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2022-01-31 17:48:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 319 states have (on average 1.2006269592476488) internal successors, (383), 319 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 388 transitions. [2022-01-31 17:48:16,009 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 388 transitions. Word has length 315 [2022-01-31 17:48:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 388 transitions. [2022-01-31 17:48:16,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 388 transitions. [2022-01-31 17:48:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 17:48:16,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:16,011 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:16,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:48:16,012 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1128975116, now seen corresponding path program 61 times [2022-01-31 17:48:16,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:16,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430690823] [2022-01-31 17:48:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:16,013 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:16,013 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:16,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:16,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:17,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:17,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:17,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430690823] [2022-01-31 17:48:17,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430690823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:17,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:17,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:48:17,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738869421] [2022-01-31 17:48:17,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:17,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:48:17,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:48:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:48:17,224 INFO L87 Difference]: Start difference. First operand 325 states and 388 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:19,192 INFO L93 Difference]: Finished difference Result 529 states and 658 transitions. [2022-01-31 17:48:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:48:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2022-01-31 17:48:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:19,193 INFO L225 Difference]: With dead ends: 529 [2022-01-31 17:48:19,193 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 17:48:19,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:48:19,194 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1178 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:19,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1179 Valid, 32 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 17:48:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2022-01-31 17:48:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 324 states have (on average 1.2006172839506173) internal successors, (389), 324 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 394 transitions. [2022-01-31 17:48:19,264 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 394 transitions. Word has length 320 [2022-01-31 17:48:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:19,264 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 394 transitions. [2022-01-31 17:48:19,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 394 transitions. [2022-01-31 17:48:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 17:48:19,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:19,270 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:19,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:48:19,270 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2066794882, now seen corresponding path program 62 times [2022-01-31 17:48:19,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:19,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384144614] [2022-01-31 17:48:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:19,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:19,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:19,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:19,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:20,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384144614] [2022-01-31 17:48:20,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [384144614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:20,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:20,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:48:20,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34386487] [2022-01-31 17:48:20,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:20,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:48:20,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:20,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:48:20,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:48:20,503 INFO L87 Difference]: Start difference. First operand 330 states and 394 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:22,548 INFO L93 Difference]: Finished difference Result 537 states and 668 transitions. [2022-01-31 17:48:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:48:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 325 [2022-01-31 17:48:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:22,549 INFO L225 Difference]: With dead ends: 537 [2022-01-31 17:48:22,549 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 17:48:22,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:48:22,551 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 991 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:22,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 47 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 17:48:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 335. [2022-01-31 17:48:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.2006079027355623) internal successors, (395), 329 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 400 transitions. [2022-01-31 17:48:22,637 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 400 transitions. Word has length 325 [2022-01-31 17:48:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:22,637 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 400 transitions. [2022-01-31 17:48:22,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 400 transitions. [2022-01-31 17:48:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 17:48:22,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:22,638 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:22,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:48:22,638 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash 697101368, now seen corresponding path program 63 times [2022-01-31 17:48:22,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:22,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205613282] [2022-01-31 17:48:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:22,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:22,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:22,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:22,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:23,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:23,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205613282] [2022-01-31 17:48:23,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205613282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:23,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:23,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:48:23,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817058291] [2022-01-31 17:48:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:23,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:48:23,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:48:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:48:23,903 INFO L87 Difference]: Start difference. First operand 335 states and 400 transitions. Second operand has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:25,978 INFO L93 Difference]: Finished difference Result 545 states and 678 transitions. [2022-01-31 17:48:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:48:25,978 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-01-31 17:48:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:25,979 INFO L225 Difference]: With dead ends: 545 [2022-01-31 17:48:25,979 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 17:48:25,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:48:25,980 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 936 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:25,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 57 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 17:48:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2022-01-31 17:48:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.2005988023952097) internal successors, (401), 334 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 406 transitions. [2022-01-31 17:48:26,076 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 406 transitions. Word has length 330 [2022-01-31 17:48:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:26,076 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 406 transitions. [2022-01-31 17:48:26,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 406 transitions. [2022-01-31 17:48:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:48:26,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:26,078 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:26,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:48:26,078 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash -422601926, now seen corresponding path program 64 times [2022-01-31 17:48:26,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436638212] [2022-01-31 17:48:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:26,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:26,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:26,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:26,083 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:27,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:27,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436638212] [2022-01-31 17:48:27,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436638212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:27,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:27,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:48:27,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243556516] [2022-01-31 17:48:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:27,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:48:27,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:48:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:48:27,393 INFO L87 Difference]: Start difference. First operand 340 states and 406 transitions. Second operand has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:29,520 INFO L93 Difference]: Finished difference Result 553 states and 688 transitions. [2022-01-31 17:48:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:48:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 17:48:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:29,522 INFO L225 Difference]: With dead ends: 553 [2022-01-31 17:48:29,522 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 17:48:29,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:48:29,523 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1190 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:29,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 42 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 17:48:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 345. [2022-01-31 17:48:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 339 states have (on average 1.2005899705014749) internal successors, (407), 339 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 412 transitions. [2022-01-31 17:48:29,614 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 412 transitions. Word has length 335 [2022-01-31 17:48:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:29,614 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 412 transitions. [2022-01-31 17:48:29,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 412 transitions. [2022-01-31 17:48:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-31 17:48:29,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:29,616 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:29,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:48:29,616 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2056881284, now seen corresponding path program 65 times [2022-01-31 17:48:29,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904441870] [2022-01-31 17:48:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:29,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:29,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:29,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:29,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:31,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:31,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:31,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904441870] [2022-01-31 17:48:31,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904441870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:31,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:31,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:48:31,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228634220] [2022-01-31 17:48:31,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:31,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:48:31,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:48:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:48:31,014 INFO L87 Difference]: Start difference. First operand 345 states and 412 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:33,236 INFO L93 Difference]: Finished difference Result 561 states and 698 transitions. [2022-01-31 17:48:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:48:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2022-01-31 17:48:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:33,237 INFO L225 Difference]: With dead ends: 561 [2022-01-31 17:48:33,237 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 17:48:33,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:48:33,239 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:33,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 47 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 17:48:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2022-01-31 17:48:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 344 states have (on average 1.2005813953488371) internal successors, (413), 344 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 418 transitions. [2022-01-31 17:48:33,317 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 418 transitions. Word has length 340 [2022-01-31 17:48:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:33,318 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 418 transitions. [2022-01-31 17:48:33,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 418 transitions. [2022-01-31 17:48:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 17:48:33,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:33,319 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:33,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:48:33,319 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash 782895094, now seen corresponding path program 66 times [2022-01-31 17:48:33,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:33,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018792877] [2022-01-31 17:48:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:33,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:33,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:33,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:33,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:34,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:34,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018792877] [2022-01-31 17:48:34,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018792877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:34,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:34,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:48:34,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263026479] [2022-01-31 17:48:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:34,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:48:34,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:48:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:48:34,710 INFO L87 Difference]: Start difference. First operand 350 states and 418 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:36,991 INFO L93 Difference]: Finished difference Result 569 states and 708 transitions. [2022-01-31 17:48:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:48:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-01-31 17:48:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:36,993 INFO L225 Difference]: With dead ends: 569 [2022-01-31 17:48:36,993 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 17:48:36,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:48:36,994 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1071 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:36,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 42 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-31 17:48:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 355. [2022-01-31 17:48:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.2005730659025788) internal successors, (419), 349 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 424 transitions. [2022-01-31 17:48:37,093 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 424 transitions. Word has length 345 [2022-01-31 17:48:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:37,093 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 424 transitions. [2022-01-31 17:48:37,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 424 transitions. [2022-01-31 17:48:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 17:48:37,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:37,095 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:37,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:48:37,095 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 910828224, now seen corresponding path program 67 times [2022-01-31 17:48:37,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318520526] [2022-01-31 17:48:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:37,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:37,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:37,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:37,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:38,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:38,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:38,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318520526] [2022-01-31 17:48:38,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318520526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:38,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:38,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:48:38,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862585326] [2022-01-31 17:48:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:48:38,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:48:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:48:38,506 INFO L87 Difference]: Start difference. First operand 355 states and 424 transitions. Second operand has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:40,872 INFO L93 Difference]: Finished difference Result 577 states and 718 transitions. [2022-01-31 17:48:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:48:40,873 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 17:48:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:40,874 INFO L225 Difference]: With dead ends: 577 [2022-01-31 17:48:40,874 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 17:48:40,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:48:40,875 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1478 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:40,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 37 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 17:48:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 360. [2022-01-31 17:48:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.2005649717514124) internal successors, (425), 354 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 430 transitions. [2022-01-31 17:48:40,972 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 430 transitions. Word has length 350 [2022-01-31 17:48:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 430 transitions. [2022-01-31 17:48:40,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 430 transitions. [2022-01-31 17:48:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:48:40,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:40,973 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:40,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:48:40,973 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:40,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1045839026, now seen corresponding path program 68 times [2022-01-31 17:48:40,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:40,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282596883] [2022-01-31 17:48:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:40,975 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:40,975 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:40,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:40,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:42,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282596883] [2022-01-31 17:48:42,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282596883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:42,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:48:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468976272] [2022-01-31 17:48:42,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:48:42,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:48:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:48:42,461 INFO L87 Difference]: Start difference. First operand 360 states and 430 transitions. Second operand has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:44,873 INFO L93 Difference]: Finished difference Result 585 states and 728 transitions. [2022-01-31 17:48:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:48:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:48:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:44,875 INFO L225 Difference]: With dead ends: 585 [2022-01-31 17:48:44,875 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 17:48:44,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:48:44,876 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1252 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:44,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1253 Valid, 37 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 17:48:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 365. [2022-01-31 17:48:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 359 states have (on average 1.200557103064067) internal successors, (431), 359 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 436 transitions. [2022-01-31 17:48:44,961 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 436 transitions. Word has length 355 [2022-01-31 17:48:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:44,962 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 436 transitions. [2022-01-31 17:48:44,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 436 transitions. [2022-01-31 17:48:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-01-31 17:48:44,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:44,963 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:44,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:48:44,963 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1019207164, now seen corresponding path program 69 times [2022-01-31 17:48:44,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:44,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031660182] [2022-01-31 17:48:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:44,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:44,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:44,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:44,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:46,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:46,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031660182] [2022-01-31 17:48:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031660182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:46,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:46,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:48:46,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415615901] [2022-01-31 17:48:46,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:48:46,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:46,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:48:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:48:46,467 INFO L87 Difference]: Start difference. First operand 365 states and 436 transitions. Second operand has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:48,930 INFO L93 Difference]: Finished difference Result 593 states and 738 transitions. [2022-01-31 17:48:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:48:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 360 [2022-01-31 17:48:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:48,931 INFO L225 Difference]: With dead ends: 593 [2022-01-31 17:48:48,932 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 17:48:48,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:48:48,933 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:48,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 47 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 17:48:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2022-01-31 17:48:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.2005494505494505) internal successors, (437), 364 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 442 transitions. [2022-01-31 17:48:49,026 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 442 transitions. Word has length 360 [2022-01-31 17:48:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 442 transitions. [2022-01-31 17:48:49,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 442 transitions. [2022-01-31 17:48:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 17:48:49,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:49,028 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:49,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:48:49,028 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1959524718, now seen corresponding path program 70 times [2022-01-31 17:48:49,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805632533] [2022-01-31 17:48:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:49,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:49,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:49,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:49,032 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:50,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:50,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:50,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805632533] [2022-01-31 17:48:50,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805632533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:50,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:50,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:48:50,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56939056] [2022-01-31 17:48:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:50,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:48:50,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:48:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:48:50,649 INFO L87 Difference]: Start difference. First operand 370 states and 442 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:53,266 INFO L93 Difference]: Finished difference Result 601 states and 748 transitions. [2022-01-31 17:48:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:48:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-01-31 17:48:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:53,267 INFO L225 Difference]: With dead ends: 601 [2022-01-31 17:48:53,267 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 17:48:53,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:48:53,269 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:53,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 37 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 17:48:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2022-01-31 17:48:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 369 states have (on average 1.2005420054200542) internal successors, (443), 369 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 448 transitions. [2022-01-31 17:48:53,370 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 448 transitions. Word has length 365 [2022-01-31 17:48:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:53,370 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 448 transitions. [2022-01-31 17:48:53,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 448 transitions. [2022-01-31 17:48:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-01-31 17:48:53,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:53,371 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:53,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:48:53,372 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1739540152, now seen corresponding path program 71 times [2022-01-31 17:48:53,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721526429] [2022-01-31 17:48:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:53,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:53,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:53,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:53,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:54,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:54,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721526429] [2022-01-31 17:48:54,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [721526429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:54,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:54,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:48:54,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488879735] [2022-01-31 17:48:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:54,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:48:54,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:48:54,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:48:54,973 INFO L87 Difference]: Start difference. First operand 375 states and 448 transitions. Second operand has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:57,560 INFO L93 Difference]: Finished difference Result 609 states and 758 transitions. [2022-01-31 17:48:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:48:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 370 [2022-01-31 17:48:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:57,561 INFO L225 Difference]: With dead ends: 609 [2022-01-31 17:48:57,561 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 17:48:57,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:48:57,562 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1387 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:57,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 37 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:48:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 17:48:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2022-01-31 17:48:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.2005347593582887) internal successors, (449), 374 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 454 transitions. [2022-01-31 17:48:57,656 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 454 transitions. Word has length 370 [2022-01-31 17:48:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:57,656 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 454 transitions. [2022-01-31 17:48:57,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 454 transitions. [2022-01-31 17:48:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:48:57,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:57,658 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:57,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:48:57,658 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:57,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:57,658 INFO L85 PathProgramCache]: Analyzing trace with hash -368902614, now seen corresponding path program 72 times [2022-01-31 17:48:57,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:57,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615866038] [2022-01-31 17:48:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:57,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:57,660 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:57,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:57,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:59,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:59,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:59,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615866038] [2022-01-31 17:48:59,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615866038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:59,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:59,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:48:59,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36077786] [2022-01-31 17:48:59,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:59,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:48:59,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:48:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:48:59,289 INFO L87 Difference]: Start difference. First operand 380 states and 454 transitions. Second operand has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:02,008 INFO L93 Difference]: Finished difference Result 617 states and 768 transitions. [2022-01-31 17:49:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:49:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 17:49:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:02,010 INFO L225 Difference]: With dead ends: 617 [2022-01-31 17:49:02,010 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 17:49:02,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:49:02,011 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1065 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:02,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 67 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 17:49:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 385. [2022-01-31 17:49:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 379 states have (on average 1.200527704485488) internal successors, (455), 379 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 460 transitions. [2022-01-31 17:49:02,106 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 460 transitions. Word has length 375 [2022-01-31 17:49:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:02,106 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 460 transitions. [2022-01-31 17:49:02,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 460 transitions. [2022-01-31 17:49:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-01-31 17:49:02,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:02,107 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:49:02,108 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash -897308532, now seen corresponding path program 73 times [2022-01-31 17:49:02,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:02,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421560226] [2022-01-31 17:49:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:02,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:02,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:02,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:02,112 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:03,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421560226] [2022-01-31 17:49:03,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421560226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:03,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:03,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:49:03,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334207713] [2022-01-31 17:49:03,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:03,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:49:03,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:49:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:49:03,807 INFO L87 Difference]: Start difference. First operand 385 states and 460 transitions. Second operand has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:06,558 INFO L93 Difference]: Finished difference Result 625 states and 778 transitions. [2022-01-31 17:49:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:49:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 380 [2022-01-31 17:49:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:06,560 INFO L225 Difference]: With dead ends: 625 [2022-01-31 17:49:06,560 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 17:49:06,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:49:06,561 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1244 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:06,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 37 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 17:49:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2022-01-31 17:49:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 384 states have (on average 1.2005208333333333) internal successors, (461), 384 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 466 transitions. [2022-01-31 17:49:06,667 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 466 transitions. Word has length 380 [2022-01-31 17:49:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:06,667 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 466 transitions. [2022-01-31 17:49:06,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 466 transitions. [2022-01-31 17:49:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-01-31 17:49:06,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:06,668 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:06,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:49:06,669 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1426912538, now seen corresponding path program 74 times [2022-01-31 17:49:06,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:06,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987438906] [2022-01-31 17:49:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:06,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:06,670 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:06,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:06,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:08,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:08,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987438906] [2022-01-31 17:49:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987438906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:08,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:08,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:49:08,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813524541] [2022-01-31 17:49:08,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:08,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:49:08,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:08,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:49:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:49:08,369 INFO L87 Difference]: Start difference. First operand 390 states and 466 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:11,202 INFO L93 Difference]: Finished difference Result 633 states and 788 transitions. [2022-01-31 17:49:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:49:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 385 [2022-01-31 17:49:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:11,203 INFO L225 Difference]: With dead ends: 633 [2022-01-31 17:49:11,203 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 17:49:11,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:49:11,205 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1210 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:11,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 37 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 17:49:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2022-01-31 17:49:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 389 states have (on average 1.2005141388174807) internal successors, (467), 389 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 472 transitions. [2022-01-31 17:49:11,333 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 472 transitions. Word has length 385 [2022-01-31 17:49:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:11,333 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 472 transitions. [2022-01-31 17:49:11,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 472 transitions. [2022-01-31 17:49:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 17:49:11,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:11,335 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:11,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:49:11,335 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:11,335 INFO L85 PathProgramCache]: Analyzing trace with hash -605900848, now seen corresponding path program 75 times [2022-01-31 17:49:11,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:11,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175730748] [2022-01-31 17:49:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:11,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:11,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:11,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:11,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:13,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:13,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175730748] [2022-01-31 17:49:13,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [175730748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:13,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:13,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:49:13,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966194799] [2022-01-31 17:49:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:13,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:49:13,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:49:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:49:13,134 INFO L87 Difference]: Start difference. First operand 395 states and 472 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:15,982 INFO L93 Difference]: Finished difference Result 641 states and 798 transitions. [2022-01-31 17:49:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:49:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 17:49:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:15,983 INFO L225 Difference]: With dead ends: 641 [2022-01-31 17:49:15,983 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 17:49:15,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:49:15,984 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1272 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:15,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 47 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 17:49:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 400. [2022-01-31 17:49:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.200507614213198) internal successors, (473), 394 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 478 transitions. [2022-01-31 17:49:16,088 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 478 transitions. Word has length 390 [2022-01-31 17:49:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:16,088 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 478 transitions. [2022-01-31 17:49:16,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 478 transitions. [2022-01-31 17:49:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 17:49:16,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:16,090 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:16,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:49:16,090 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash -174858334, now seen corresponding path program 76 times [2022-01-31 17:49:16,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:16,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148112371] [2022-01-31 17:49:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:16,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:16,091 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:16,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:16,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:17,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:17,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148112371] [2022-01-31 17:49:17,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148112371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:17,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:17,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:49:17,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906374400] [2022-01-31 17:49:17,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:17,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:49:17,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:17,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:49:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:49:17,900 INFO L87 Difference]: Start difference. First operand 400 states and 478 transitions. Second operand has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:20,859 INFO L93 Difference]: Finished difference Result 649 states and 808 transitions. [2022-01-31 17:49:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:49:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 17:49:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:20,861 INFO L225 Difference]: With dead ends: 649 [2022-01-31 17:49:20,861 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 17:49:20,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:49:20,862 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:20,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 52 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 17:49:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2022-01-31 17:49:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 399 states have (on average 1.200501253132832) internal successors, (479), 399 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 484 transitions. [2022-01-31 17:49:20,982 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 484 transitions. Word has length 395 [2022-01-31 17:49:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:20,982 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 484 transitions. [2022-01-31 17:49:20,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 484 transitions. [2022-01-31 17:49:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-01-31 17:49:20,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:20,983 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:20,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:49:20,983 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:20,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2138345236, now seen corresponding path program 77 times [2022-01-31 17:49:20,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:20,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758194218] [2022-01-31 17:49:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:20,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:20,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:20,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:20,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:22,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:22,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758194218] [2022-01-31 17:49:22,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758194218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:22,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:22,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:49:22,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484606679] [2022-01-31 17:49:22,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:22,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:49:22,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:22,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:49:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:49:22,852 INFO L87 Difference]: Start difference. First operand 405 states and 484 transitions. Second operand has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:25,917 INFO L93 Difference]: Finished difference Result 657 states and 818 transitions. [2022-01-31 17:49:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:49:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 400 [2022-01-31 17:49:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:25,919 INFO L225 Difference]: With dead ends: 657 [2022-01-31 17:49:25,919 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 17:49:25,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:49:25,921 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1438 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:25,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 32 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 17:49:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2022-01-31 17:49:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 404 states have (on average 1.2004950495049505) internal successors, (485), 404 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 490 transitions. [2022-01-31 17:49:26,040 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 490 transitions. Word has length 400 [2022-01-31 17:49:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:26,040 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 490 transitions. [2022-01-31 17:49:26,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 490 transitions. [2022-01-31 17:49:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-31 17:49:26,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:26,042 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:26,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:49:26,042 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1960655966, now seen corresponding path program 78 times [2022-01-31 17:49:26,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:26,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463186939] [2022-01-31 17:49:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:26,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:26,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:26,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:26,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:27,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:27,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463186939] [2022-01-31 17:49:27,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463186939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:27,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:27,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:49:27,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349315766] [2022-01-31 17:49:27,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:27,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:49:27,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:49:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:49:27,930 INFO L87 Difference]: Start difference. First operand 410 states and 490 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:30,995 INFO L93 Difference]: Finished difference Result 665 states and 828 transitions. [2022-01-31 17:49:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:49:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-01-31 17:49:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:30,997 INFO L225 Difference]: With dead ends: 665 [2022-01-31 17:49:30,997 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 17:49:30,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:49:30,998 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1158 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:30,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 57 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 17:49:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2022-01-31 17:49:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 409 states have (on average 1.2004889975550121) internal successors, (491), 409 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 496 transitions. [2022-01-31 17:49:31,121 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 496 transitions. Word has length 405 [2022-01-31 17:49:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:31,121 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 496 transitions. [2022-01-31 17:49:31,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 496 transitions. [2022-01-31 17:49:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 17:49:31,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:31,123 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:31,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:49:31,123 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:31,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1564608088, now seen corresponding path program 79 times [2022-01-31 17:49:31,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:31,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469568537] [2022-01-31 17:49:31,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:31,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:31,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:31,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:31,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:33,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:33,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:33,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469568537] [2022-01-31 17:49:33,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [469568537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:33,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:33,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:49:33,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684465767] [2022-01-31 17:49:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:33,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:49:33,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:49:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:49:33,057 INFO L87 Difference]: Start difference. First operand 415 states and 496 transitions. Second operand has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:36,288 INFO L93 Difference]: Finished difference Result 673 states and 838 transitions. [2022-01-31 17:49:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:49:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 410 [2022-01-31 17:49:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:36,289 INFO L225 Difference]: With dead ends: 673 [2022-01-31 17:49:36,289 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 17:49:36,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:49:36,291 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1304 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:36,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1305 Valid, 37 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 17:49:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 420. [2022-01-31 17:49:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 414 states have (on average 1.2004830917874396) internal successors, (497), 414 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 502 transitions. [2022-01-31 17:49:36,407 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 502 transitions. Word has length 410 [2022-01-31 17:49:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:36,407 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 502 transitions. [2022-01-31 17:49:36,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 502 transitions. [2022-01-31 17:49:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-31 17:49:36,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:36,409 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:36,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:49:36,409 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2093408538, now seen corresponding path program 80 times [2022-01-31 17:49:36,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:36,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715253932] [2022-01-31 17:49:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:36,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:36,411 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:36,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:36,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:38,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:38,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715253932] [2022-01-31 17:49:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1715253932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:38,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:38,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:49:38,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443261790] [2022-01-31 17:49:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:38,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:49:38,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:49:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:49:38,380 INFO L87 Difference]: Start difference. First operand 420 states and 502 transitions. Second operand has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:41,725 INFO L93 Difference]: Finished difference Result 681 states and 848 transitions. [2022-01-31 17:49:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:49:41,726 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2022-01-31 17:49:41,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:41,727 INFO L225 Difference]: With dead ends: 681 [2022-01-31 17:49:41,727 INFO L226 Difference]: Without dead ends: 428 [2022-01-31 17:49:41,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:49:41,728 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1306 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:41,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 62 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-31 17:49:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 425. [2022-01-31 17:49:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 419 states have (on average 1.2004773269689737) internal successors, (503), 419 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 508 transitions. [2022-01-31 17:49:41,855 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 508 transitions. Word has length 415 [2022-01-31 17:49:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:41,855 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 508 transitions. [2022-01-31 17:49:41,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 508 transitions. [2022-01-31 17:49:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-01-31 17:49:41,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:41,856 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:49:41,856 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash -699181668, now seen corresponding path program 81 times [2022-01-31 17:49:41,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807315191] [2022-01-31 17:49:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:41,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:41,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:41,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:41,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:43,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:43,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:43,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807315191] [2022-01-31 17:49:43,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807315191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:43,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:43,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:49:43,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991858206] [2022-01-31 17:49:43,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:43,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:49:43,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:49:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:49:43,913 INFO L87 Difference]: Start difference. First operand 425 states and 508 transitions. Second operand has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:47,360 INFO L93 Difference]: Finished difference Result 689 states and 858 transitions. [2022-01-31 17:49:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:49:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 420 [2022-01-31 17:49:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:47,362 INFO L225 Difference]: With dead ends: 689 [2022-01-31 17:49:47,362 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 17:49:47,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:49:47,363 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1671 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:47,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1672 Valid, 37 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 17:49:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 430. [2022-01-31 17:49:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 424 states have (on average 1.2004716981132075) internal successors, (509), 424 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 514 transitions. [2022-01-31 17:49:47,483 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 514 transitions. Word has length 420 [2022-01-31 17:49:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:47,483 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 514 transitions. [2022-01-31 17:49:47,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 514 transitions. [2022-01-31 17:49:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-31 17:49:47,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:47,485 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:47,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:49:47,485 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1179160022, now seen corresponding path program 82 times [2022-01-31 17:49:47,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704428796] [2022-01-31 17:49:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:47,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:47,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:47,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:47,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:49,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704428796] [2022-01-31 17:49:49,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704428796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:49,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:49,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:49:49,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208325091] [2022-01-31 17:49:49,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:49,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:49:49,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:49:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:49:49,572 INFO L87 Difference]: Start difference. First operand 430 states and 514 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:53,084 INFO L93 Difference]: Finished difference Result 697 states and 868 transitions. [2022-01-31 17:49:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:49:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2022-01-31 17:49:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:53,086 INFO L225 Difference]: With dead ends: 697 [2022-01-31 17:49:53,086 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 17:49:53,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:49:53,087 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1241 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:53,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 57 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 17:49:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 435. [2022-01-31 17:49:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 429 states have (on average 1.2004662004662006) internal successors, (515), 429 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 520 transitions. [2022-01-31 17:49:53,217 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 520 transitions. Word has length 425 [2022-01-31 17:49:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:53,217 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 520 transitions. [2022-01-31 17:49:53,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 520 transitions. [2022-01-31 17:49:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 17:49:53,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:53,219 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:53,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:49:53,219 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -927941408, now seen corresponding path program 83 times [2022-01-31 17:49:53,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:53,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616291284] [2022-01-31 17:49:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:53,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:53,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:53,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:53,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:55,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:55,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616291284] [2022-01-31 17:49:55,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616291284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:55,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:55,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:49:55,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820159739] [2022-01-31 17:49:55,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:55,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:49:55,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:49:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:49:55,332 INFO L87 Difference]: Start difference. First operand 435 states and 520 transitions. Second operand has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:58,879 INFO L93 Difference]: Finished difference Result 705 states and 878 transitions. [2022-01-31 17:49:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:49:58,879 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2022-01-31 17:49:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:58,880 INFO L225 Difference]: With dead ends: 705 [2022-01-31 17:49:58,880 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 17:49:58,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:49:58,882 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1732 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:58,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 32 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:49:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 17:49:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 440. [2022-01-31 17:49:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.2004608294930876) internal successors, (521), 434 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 526 transitions. [2022-01-31 17:49:59,018 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 526 transitions. Word has length 430 [2022-01-31 17:49:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:59,018 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 526 transitions. [2022-01-31 17:49:59,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 526 transitions. [2022-01-31 17:49:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:49:59,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:59,020 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:59,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:49:59,020 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash 727319186, now seen corresponding path program 84 times [2022-01-31 17:49:59,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:59,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319665284] [2022-01-31 17:49:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:59,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:59,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:59,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:59,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:01,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:01,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319665284] [2022-01-31 17:50:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [319665284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:01,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:01,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:50:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842505973] [2022-01-31 17:50:01,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:50:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:50:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:50:01,173 INFO L87 Difference]: Start difference. First operand 440 states and 526 transitions. Second operand has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:04,865 INFO L93 Difference]: Finished difference Result 713 states and 888 transitions. [2022-01-31 17:50:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:50:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 17:50:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:04,866 INFO L225 Difference]: With dead ends: 713 [2022-01-31 17:50:04,866 INFO L226 Difference]: Without dead ends: 448 [2022-01-31 17:50:04,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:50:04,868 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1503 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:04,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 37 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-31 17:50:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 445. [2022-01-31 17:50:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 439 states have (on average 1.2004555808656037) internal successors, (527), 439 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 532 transitions. [2022-01-31 17:50:05,005 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 532 transitions. Word has length 435 [2022-01-31 17:50:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:05,005 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 532 transitions. [2022-01-31 17:50:05,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 532 transitions. [2022-01-31 17:50:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-01-31 17:50:05,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:05,007 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:05,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:50:05,007 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1398963236, now seen corresponding path program 85 times [2022-01-31 17:50:05,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:05,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258760835] [2022-01-31 17:50:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:05,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:05,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:05,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:05,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:07,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:07,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258760835] [2022-01-31 17:50:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [258760835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:07,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:07,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:50:07,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756789968] [2022-01-31 17:50:07,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:07,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:50:07,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:50:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:50:07,250 INFO L87 Difference]: Start difference. First operand 445 states and 532 transitions. Second operand has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:10,965 INFO L93 Difference]: Finished difference Result 721 states and 898 transitions. [2022-01-31 17:50:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:50:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 440 [2022-01-31 17:50:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:10,967 INFO L225 Difference]: With dead ends: 721 [2022-01-31 17:50:10,967 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 17:50:10,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:50:10,969 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1541 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:10,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 42 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 17:50:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 450. [2022-01-31 17:50:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 444 states have (on average 1.2004504504504505) internal successors, (533), 444 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 538 transitions. [2022-01-31 17:50:11,122 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 538 transitions. Word has length 440 [2022-01-31 17:50:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:11,122 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 538 transitions. [2022-01-31 17:50:11,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 538 transitions. [2022-01-31 17:50:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-01-31 17:50:11,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:11,123 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:11,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:50:11,124 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash -487391410, now seen corresponding path program 86 times [2022-01-31 17:50:11,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:11,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468773860] [2022-01-31 17:50:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:11,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:11,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:11,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:11,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:13,384 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468773860] [2022-01-31 17:50:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468773860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:13,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:13,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:50:13,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428050917] [2022-01-31 17:50:13,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:13,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:50:13,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:50:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:50:13,386 INFO L87 Difference]: Start difference. First operand 450 states and 538 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:17,222 INFO L93 Difference]: Finished difference Result 729 states and 908 transitions. [2022-01-31 17:50:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:50:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 445 [2022-01-31 17:50:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:17,224 INFO L225 Difference]: With dead ends: 729 [2022-01-31 17:50:17,224 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 17:50:17,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:50:17,225 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1324 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:17,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1325 Valid, 62 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 17:50:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 455. [2022-01-31 17:50:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.200445434298441) internal successors, (539), 449 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 544 transitions. [2022-01-31 17:50:17,369 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 544 transitions. Word has length 445 [2022-01-31 17:50:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:17,369 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 544 transitions. [2022-01-31 17:50:17,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 544 transitions. [2022-01-31 17:50:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-01-31 17:50:17,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:17,371 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:17,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:50:17,371 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:17,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1703881880, now seen corresponding path program 87 times [2022-01-31 17:50:17,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:17,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660889514] [2022-01-31 17:50:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:17,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:17,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:17,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:17,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:19,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:19,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660889514] [2022-01-31 17:50:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [660889514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:19,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:19,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:50:19,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095266490] [2022-01-31 17:50:19,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:19,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:50:19,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:19,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:50:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:50:19,675 INFO L87 Difference]: Start difference. First operand 455 states and 544 transitions. Second operand has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:23,605 INFO L93 Difference]: Finished difference Result 737 states and 918 transitions. [2022-01-31 17:50:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:50:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 450 [2022-01-31 17:50:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:23,606 INFO L225 Difference]: With dead ends: 737 [2022-01-31 17:50:23,606 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 17:50:23,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:50:23,608 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1692 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:23,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 52 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 17:50:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2022-01-31 17:50:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 454 states have (on average 1.2004405286343611) internal successors, (545), 454 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 550 transitions. [2022-01-31 17:50:23,754 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 550 transitions. Word has length 450 [2022-01-31 17:50:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:23,754 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 550 transitions. [2022-01-31 17:50:23,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 550 transitions. [2022-01-31 17:50:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 17:50:23,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:23,756 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:23,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:50:23,756 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1123335158, now seen corresponding path program 88 times [2022-01-31 17:50:23,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:23,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230245033] [2022-01-31 17:50:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:23,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:23,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:23,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:23,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:26,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:26,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230245033] [2022-01-31 17:50:26,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230245033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:26,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:26,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:50:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182805840] [2022-01-31 17:50:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:50:26,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:50:26,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:50:26,103 INFO L87 Difference]: Start difference. First operand 460 states and 550 transitions. Second operand has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:30,085 INFO L93 Difference]: Finished difference Result 745 states and 928 transitions. [2022-01-31 17:50:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:50:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 17:50:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:30,087 INFO L225 Difference]: With dead ends: 745 [2022-01-31 17:50:30,087 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 17:50:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:50:30,088 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1526 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:30,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 47 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 17:50:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2022-01-31 17:50:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 459 states have (on average 1.2004357298474946) internal successors, (551), 459 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-01-31 17:50:30,231 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 455 [2022-01-31 17:50:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:30,231 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-01-31 17:50:30,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-01-31 17:50:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-01-31 17:50:30,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:30,233 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:30,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:50:30,233 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:30,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1964768596, now seen corresponding path program 89 times [2022-01-31 17:50:30,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:30,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400099337] [2022-01-31 17:50:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:30,241 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:30,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:30,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:30,245 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:32,666 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400099337] [2022-01-31 17:50:32,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400099337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:32,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:32,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:50:32,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780119629] [2022-01-31 17:50:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:32,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:50:32,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:50:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:50:32,668 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:36,709 INFO L93 Difference]: Finished difference Result 753 states and 938 transitions. [2022-01-31 17:50:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:50:36,710 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 460 [2022-01-31 17:50:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:36,711 INFO L225 Difference]: With dead ends: 753 [2022-01-31 17:50:36,711 INFO L226 Difference]: Without dead ends: 473 [2022-01-31 17:50:36,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:50:36,713 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1597 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:36,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 37 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-31 17:50:36,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 470. [2022-01-31 17:50:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 464 states have (on average 1.2004310344827587) internal successors, (557), 464 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 562 transitions. [2022-01-31 17:50:36,867 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 562 transitions. Word has length 460 [2022-01-31 17:50:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:36,867 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 562 transitions. [2022-01-31 17:50:36,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 562 transitions. [2022-01-31 17:50:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-31 17:50:36,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:36,869 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:36,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:50:36,869 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash -560295738, now seen corresponding path program 90 times [2022-01-31 17:50:36,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:36,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199237585] [2022-01-31 17:50:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:36,870 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:36,870 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:36,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:36,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:39,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:39,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:39,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199237585] [2022-01-31 17:50:39,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199237585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:39,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:39,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:50:39,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028794612] [2022-01-31 17:50:39,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:39,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:50:39,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:50:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:50:39,319 INFO L87 Difference]: Start difference. First operand 470 states and 562 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:43,526 INFO L93 Difference]: Finished difference Result 761 states and 948 transitions. [2022-01-31 17:50:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:50:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 465 [2022-01-31 17:50:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:43,528 INFO L225 Difference]: With dead ends: 761 [2022-01-31 17:50:43,528 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 17:50:43,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:50:43,530 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1581 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:43,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 62 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 17:50:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 475. [2022-01-31 17:50:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.2004264392324093) internal successors, (563), 469 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:43,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 568 transitions. [2022-01-31 17:50:43,688 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 568 transitions. Word has length 465 [2022-01-31 17:50:43,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:43,689 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 568 transitions. [2022-01-31 17:50:43,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 568 transitions. [2022-01-31 17:50:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 17:50:43,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:43,690 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:43,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:50:43,690 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1631303184, now seen corresponding path program 91 times [2022-01-31 17:50:43,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:43,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210916362] [2022-01-31 17:50:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:43,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:43,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:43,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:43,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:46,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:46,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:46,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210916362] [2022-01-31 17:50:46,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210916362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:46,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:46,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:50:46,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618604936] [2022-01-31 17:50:46,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:46,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:50:46,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:50:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:50:46,244 INFO L87 Difference]: Start difference. First operand 475 states and 568 transitions. Second operand has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:50,496 INFO L93 Difference]: Finished difference Result 769 states and 958 transitions. [2022-01-31 17:50:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:50:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 470 [2022-01-31 17:50:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:50,498 INFO L225 Difference]: With dead ends: 769 [2022-01-31 17:50:50,498 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 17:50:50,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:50:50,500 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1553 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:50,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 37 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:50:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 17:50:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 480. [2022-01-31 17:50:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.2004219409282701) internal successors, (569), 474 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 574 transitions. [2022-01-31 17:50:50,675 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 574 transitions. Word has length 470 [2022-01-31 17:50:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:50,675 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 574 transitions. [2022-01-31 17:50:50,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 574 transitions. [2022-01-31 17:50:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 17:50:50,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:50,677 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:50,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:50:50,677 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2107155842, now seen corresponding path program 92 times [2022-01-31 17:50:50,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:50,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349115291] [2022-01-31 17:50:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:50,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:50,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:50,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:50,683 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:53,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:53,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:53,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349115291] [2022-01-31 17:50:53,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349115291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:53,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:53,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:50:53,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601875337] [2022-01-31 17:50:53,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:53,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:50:53,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:50:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:50:53,278 INFO L87 Difference]: Start difference. First operand 480 states and 574 transitions. Second operand has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:57,633 INFO L93 Difference]: Finished difference Result 777 states and 968 transitions. [2022-01-31 17:50:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:50:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 17:50:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:57,634 INFO L225 Difference]: With dead ends: 777 [2022-01-31 17:50:57,634 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 17:50:57,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:50:57,636 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1819 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:57,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 47 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:50:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 17:50:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 485. [2022-01-31 17:50:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 479 states have (on average 1.2004175365344467) internal successors, (575), 479 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 580 transitions. [2022-01-31 17:50:57,801 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 580 transitions. Word has length 475 [2022-01-31 17:50:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:57,801 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 580 transitions. [2022-01-31 17:50:57,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 580 transitions. [2022-01-31 17:50:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-01-31 17:50:57,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:57,803 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:57,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:50:57,803 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1592137420, now seen corresponding path program 93 times [2022-01-31 17:50:57,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:57,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65835971] [2022-01-31 17:50:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:57,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:57,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:57,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:57,809 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:00,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:00,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:00,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65835971] [2022-01-31 17:51:00,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [65835971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:00,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:00,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:51:00,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974554291] [2022-01-31 17:51:00,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:00,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:51:00,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:51:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:51:00,405 INFO L87 Difference]: Start difference. First operand 485 states and 580 transitions. Second operand has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:04,926 INFO L93 Difference]: Finished difference Result 785 states and 978 transitions. [2022-01-31 17:51:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:51:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 480 [2022-01-31 17:51:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:04,928 INFO L225 Difference]: With dead ends: 785 [2022-01-31 17:51:04,928 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 17:51:04,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:51:04,930 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1872 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:04,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 42 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 17:51:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 490. [2022-01-31 17:51:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 484 states have (on average 1.2004132231404958) internal successors, (581), 484 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 586 transitions. [2022-01-31 17:51:05,101 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 586 transitions. Word has length 480 [2022-01-31 17:51:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:05,101 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 586 transitions. [2022-01-31 17:51:05,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 586 transitions. [2022-01-31 17:51:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2022-01-31 17:51:05,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:05,103 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:05,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:51:05,103 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash 486359614, now seen corresponding path program 94 times [2022-01-31 17:51:05,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838228454] [2022-01-31 17:51:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:05,105 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:05,105 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:05,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:05,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:07,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:07,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838228454] [2022-01-31 17:51:07,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838228454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:07,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:07,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:51:07,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376497653] [2022-01-31 17:51:07,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:07,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:51:07,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:51:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:51:07,810 INFO L87 Difference]: Start difference. First operand 490 states and 586 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:12,408 INFO L93 Difference]: Finished difference Result 793 states and 988 transitions. [2022-01-31 17:51:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:51:12,408 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 485 [2022-01-31 17:51:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:12,409 INFO L225 Difference]: With dead ends: 793 [2022-01-31 17:51:12,409 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 17:51:12,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:51:12,411 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1712 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:12,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 47 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 17:51:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 495. [2022-01-31 17:51:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 489 states have (on average 1.2004089979550103) internal successors, (587), 489 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 592 transitions. [2022-01-31 17:51:12,581 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 592 transitions. Word has length 485 [2022-01-31 17:51:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:12,581 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 592 transitions. [2022-01-31 17:51:12,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 592 transitions. [2022-01-31 17:51:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2022-01-31 17:51:12,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:12,583 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:12,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:51:12,583 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:12,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1911365752, now seen corresponding path program 95 times [2022-01-31 17:51:12,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294285260] [2022-01-31 17:51:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:12,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:12,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:12,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:12,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:15,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294285260] [2022-01-31 17:51:15,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294285260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:15,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:15,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:51:15,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313512487] [2022-01-31 17:51:15,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:15,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:51:15,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:51:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:51:15,315 INFO L87 Difference]: Start difference. First operand 495 states and 592 transitions. Second operand has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:20,038 INFO L93 Difference]: Finished difference Result 801 states and 998 transitions. [2022-01-31 17:51:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:51:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 490 [2022-01-31 17:51:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:20,039 INFO L225 Difference]: With dead ends: 801 [2022-01-31 17:51:20,039 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 17:51:20,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:51:20,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2038 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:20,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2039 Valid, 32 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 17:51:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 500. [2022-01-31 17:51:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 494 states have (on average 1.2004048582995952) internal successors, (593), 494 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 598 transitions. [2022-01-31 17:51:20,217 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 598 transitions. Word has length 490 [2022-01-31 17:51:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:20,218 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 598 transitions. [2022-01-31 17:51:20,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 598 transitions. [2022-01-31 17:51:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:51:20,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:20,219 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:20,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:51:20,220 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash -926931206, now seen corresponding path program 96 times [2022-01-31 17:51:20,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:20,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799851340] [2022-01-31 17:51:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:20,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:20,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:20,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:20,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:23,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799851340] [2022-01-31 17:51:23,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [799851340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:23,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:51:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101561054] [2022-01-31 17:51:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:51:23,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:51:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:51:23,073 INFO L87 Difference]: Start difference. First operand 500 states and 598 transitions. Second operand has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:28,022 INFO L93 Difference]: Finished difference Result 809 states and 1008 transitions. [2022-01-31 17:51:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:51:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 17:51:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:28,024 INFO L225 Difference]: With dead ends: 809 [2022-01-31 17:51:28,024 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 17:51:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:51:28,026 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1782 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:28,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 52 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 17:51:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 505. [2022-01-31 17:51:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 499 states have (on average 1.2004008016032064) internal successors, (599), 499 states have internal predecessors, (599), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 604 transitions. [2022-01-31 17:51:28,209 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 604 transitions. Word has length 495 [2022-01-31 17:51:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:28,209 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 604 transitions. [2022-01-31 17:51:28,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 604 transitions. [2022-01-31 17:51:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-01-31 17:51:28,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:28,211 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:28,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:51:28,212 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash -901369924, now seen corresponding path program 97 times [2022-01-31 17:51:28,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:28,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282283097] [2022-01-31 17:51:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:28,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:28,213 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:28,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:28,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:31,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:31,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282283097] [2022-01-31 17:51:31,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282283097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:31,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:31,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:51:31,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701437324] [2022-01-31 17:51:31,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:31,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:51:31,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:31,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:51:31,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:51:31,131 INFO L87 Difference]: Start difference. First operand 505 states and 604 transitions. Second operand has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:36,270 INFO L93 Difference]: Finished difference Result 817 states and 1018 transitions. [2022-01-31 17:51:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:51:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 500 [2022-01-31 17:51:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:36,272 INFO L225 Difference]: With dead ends: 817 [2022-01-31 17:51:36,272 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 17:51:36,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:51:36,274 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1490 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:36,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 52 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 17:51:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2022-01-31 17:51:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 504 states have (on average 1.2003968253968254) internal successors, (605), 504 states have internal predecessors, (605), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 610 transitions. [2022-01-31 17:51:36,471 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 610 transitions. Word has length 500 [2022-01-31 17:51:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:36,471 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 610 transitions. [2022-01-31 17:51:36,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 610 transitions. [2022-01-31 17:51:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-01-31 17:51:36,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:36,473 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:36,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:51:36,474 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1373180854, now seen corresponding path program 98 times [2022-01-31 17:51:36,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:36,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4708691] [2022-01-31 17:51:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:36,475 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:36,475 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:36,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:36,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:39,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4708691] [2022-01-31 17:51:39,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [4708691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:39,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:39,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:51:39,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491181792] [2022-01-31 17:51:39,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:39,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:51:39,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:51:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:51:39,479 INFO L87 Difference]: Start difference. First operand 510 states and 610 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:44,735 INFO L93 Difference]: Finished difference Result 825 states and 1028 transitions. [2022-01-31 17:51:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:51:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 505 [2022-01-31 17:51:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:44,736 INFO L225 Difference]: With dead ends: 825 [2022-01-31 17:51:44,736 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 17:51:44,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:51:44,738 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1861 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:44,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1862 Valid, 27 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 17:51:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 515. [2022-01-31 17:51:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 509 states have (on average 1.200392927308448) internal successors, (611), 509 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 616 transitions. [2022-01-31 17:51:44,938 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 616 transitions. Word has length 505 [2022-01-31 17:51:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:44,938 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 616 transitions. [2022-01-31 17:51:44,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 616 transitions. [2022-01-31 17:51:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-01-31 17:51:44,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:44,940 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:44,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:51:44,941 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2971392, now seen corresponding path program 99 times [2022-01-31 17:51:44,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:44,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904337679] [2022-01-31 17:51:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:44,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:44,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:44,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:44,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:47,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:47,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904337679] [2022-01-31 17:51:47,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904337679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:47,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:47,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:51:47,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073852819] [2022-01-31 17:51:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:47,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:51:47,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:51:47,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:51:47,935 INFO L87 Difference]: Start difference. First operand 515 states and 616 transitions. Second operand has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:53,310 INFO L93 Difference]: Finished difference Result 833 states and 1038 transitions. [2022-01-31 17:51:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:51:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 510 [2022-01-31 17:51:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:53,312 INFO L225 Difference]: With dead ends: 833 [2022-01-31 17:51:53,312 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 17:51:53,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:51:53,314 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1659 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:53,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1660 Valid, 52 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:51:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 17:51:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 520. [2022-01-31 17:51:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.2003891050583657) internal successors, (617), 514 states have internal predecessors, (617), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 622 transitions. [2022-01-31 17:51:53,502 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 622 transitions. Word has length 510 [2022-01-31 17:51:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:53,503 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 622 transitions. [2022-01-31 17:51:53,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 622 transitions. [2022-01-31 17:51:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:51:53,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:53,504 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:53,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:51:53,505 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1975531406, now seen corresponding path program 100 times [2022-01-31 17:51:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:53,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218998586] [2022-01-31 17:51:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:53,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:53,506 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:53,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:53,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:56,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:56,570 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218998586] [2022-01-31 17:51:56,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [218998586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:56,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:56,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:51:56,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488989287] [2022-01-31 17:51:56,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:56,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:51:56,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:51:56,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:51:56,573 INFO L87 Difference]: Start difference. First operand 520 states and 622 transitions. Second operand has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:02,088 INFO L93 Difference]: Finished difference Result 841 states and 1048 transitions. [2022-01-31 17:52:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:52:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 515 [2022-01-31 17:52:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:02,089 INFO L225 Difference]: With dead ends: 841 [2022-01-31 17:52:02,089 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 17:52:02,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:52:02,091 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1877 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:02,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 37 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:52:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 17:52:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 525. [2022-01-31 17:52:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 519 states have (on average 1.2003853564547207) internal successors, (623), 519 states have internal predecessors, (623), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 628 transitions. [2022-01-31 17:52:02,291 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 628 transitions. Word has length 515 [2022-01-31 17:52:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:02,292 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 628 transitions. [2022-01-31 17:52:02,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 628 transitions. [2022-01-31 17:52:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-01-31 17:52:02,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:02,294 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:02,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:52:02,294 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash -894773692, now seen corresponding path program 101 times [2022-01-31 17:52:02,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436083368] [2022-01-31 17:52:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:02,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:02,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:02,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:02,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:05,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436083368] [2022-01-31 17:52:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436083368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:05,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:05,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:52:05,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409316277] [2022-01-31 17:52:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:05,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:52:05,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:52:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:52:05,422 INFO L87 Difference]: Start difference. First operand 525 states and 628 transitions. Second operand has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:11,075 INFO L93 Difference]: Finished difference Result 849 states and 1058 transitions. [2022-01-31 17:52:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:52:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 520 [2022-01-31 17:52:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:11,076 INFO L225 Difference]: With dead ends: 849 [2022-01-31 17:52:11,076 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 17:52:11,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:52:11,078 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2317 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:11,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 32 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:52:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 17:52:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 530. [2022-01-31 17:52:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 524 states have (on average 1.200381679389313) internal successors, (629), 524 states have internal predecessors, (629), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 634 transitions. [2022-01-31 17:52:11,281 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 634 transitions. Word has length 520 [2022-01-31 17:52:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:11,281 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 634 transitions. [2022-01-31 17:52:11,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 634 transitions. [2022-01-31 17:52:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-01-31 17:52:11,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:11,283 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:11,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:52:11,283 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2132015826, now seen corresponding path program 102 times [2022-01-31 17:52:11,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188742226] [2022-01-31 17:52:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:11,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:11,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:11,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:11,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:14,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:14,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:14,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188742226] [2022-01-31 17:52:14,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188742226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:14,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:14,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:52:14,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066309337] [2022-01-31 17:52:14,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:14,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:52:14,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:52:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:52:14,506 INFO L87 Difference]: Start difference. First operand 530 states and 634 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:20,233 INFO L93 Difference]: Finished difference Result 857 states and 1068 transitions. [2022-01-31 17:52:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:52:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 525 [2022-01-31 17:52:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:20,234 INFO L225 Difference]: With dead ends: 857 [2022-01-31 17:52:20,234 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 17:52:20,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:52:20,236 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2112 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:20,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 42 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:52:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 17:52:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2022-01-31 17:52:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 529 states have (on average 1.2003780718336483) internal successors, (635), 529 states have internal predecessors, (635), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 640 transitions. [2022-01-31 17:52:20,443 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 640 transitions. Word has length 525 [2022-01-31 17:52:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:20,443 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 640 transitions. [2022-01-31 17:52:20,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 640 transitions. [2022-01-31 17:52:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 17:52:20,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:20,445 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:20,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:52:20,445 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 96923016, now seen corresponding path program 103 times [2022-01-31 17:52:20,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:20,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225495898] [2022-01-31 17:52:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:20,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:20,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:20,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:20,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:23,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:23,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225495898] [2022-01-31 17:52:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225495898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:23,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:52:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199874702] [2022-01-31 17:52:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:52:23,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:52:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:52:23,720 INFO L87 Difference]: Start difference. First operand 535 states and 640 transitions. Second operand has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:29,666 INFO L93 Difference]: Finished difference Result 865 states and 1078 transitions. [2022-01-31 17:52:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:52:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 530 [2022-01-31 17:52:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:29,667 INFO L225 Difference]: With dead ends: 865 [2022-01-31 17:52:29,667 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 17:52:29,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:52:29,669 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1892 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:29,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 47 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:52:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 17:52:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 540. [2022-01-31 17:52:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.200374531835206) internal successors, (641), 534 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 646 transitions. [2022-01-31 17:52:29,886 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 646 transitions. Word has length 530 [2022-01-31 17:52:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:29,886 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 646 transitions. [2022-01-31 17:52:29,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 646 transitions. [2022-01-31 17:52:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-01-31 17:52:29,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:29,888 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:29,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:52:29,888 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1110078998, now seen corresponding path program 104 times [2022-01-31 17:52:29,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377809774] [2022-01-31 17:52:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:29,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:29,889 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:29,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:29,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:33,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:33,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:33,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377809774] [2022-01-31 17:52:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377809774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:33,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:33,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:52:33,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002911848] [2022-01-31 17:52:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:52:33,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:52:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:52:33,210 INFO L87 Difference]: Start difference. First operand 540 states and 646 transitions. Second operand has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:39,368 INFO L93 Difference]: Finished difference Result 873 states and 1088 transitions. [2022-01-31 17:52:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:52:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 535 [2022-01-31 17:52:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:39,370 INFO L225 Difference]: With dead ends: 873 [2022-01-31 17:52:39,370 INFO L226 Difference]: Without dead ends: 548 [2022-01-31 17:52:39,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:52:39,372 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2026 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:39,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2027 Valid, 47 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:52:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-31 17:52:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 545. [2022-01-31 17:52:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 539 states have (on average 1.2003710575139146) internal successors, (647), 539 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 652 transitions. [2022-01-31 17:52:39,584 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 652 transitions. Word has length 535 [2022-01-31 17:52:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:39,584 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 652 transitions. [2022-01-31 17:52:39,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 652 transitions. [2022-01-31 17:52:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2022-01-31 17:52:39,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:39,586 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:39,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:52:39,586 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1988746444, now seen corresponding path program 105 times [2022-01-31 17:52:39,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:39,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918569958] [2022-01-31 17:52:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:39,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:39,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:39,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:39,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:42,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:42,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:42,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918569958] [2022-01-31 17:52:42,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [918569958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:42,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:42,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:52:42,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678298924] [2022-01-31 17:52:42,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:42,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:52:42,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:42,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:52:42,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:52:42,946 INFO L87 Difference]: Start difference. First operand 545 states and 652 transitions. Second operand has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:49,057 INFO L93 Difference]: Finished difference Result 881 states and 1098 transitions. [2022-01-31 17:52:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:52:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 540 [2022-01-31 17:52:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:49,059 INFO L225 Difference]: With dead ends: 881 [2022-01-31 17:52:49,059 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 17:52:49,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:52:49,061 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1884 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1885 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:49,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1885 Valid, 62 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:52:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 17:52:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 550. [2022-01-31 17:52:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 544 states have (on average 1.2003676470588236) internal successors, (653), 544 states have internal predecessors, (653), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 658 transitions. [2022-01-31 17:52:49,283 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 658 transitions. Word has length 540 [2022-01-31 17:52:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:49,284 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 658 transitions. [2022-01-31 17:52:49,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 658 transitions. [2022-01-31 17:52:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-01-31 17:52:49,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:49,285 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:49,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:52:49,286 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2113148582, now seen corresponding path program 106 times [2022-01-31 17:52:49,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:49,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531507689] [2022-01-31 17:52:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:49,287 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:49,287 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:49,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:49,293 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:52,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:52,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531507689] [2022-01-31 17:52:52,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531507689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:52,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:52,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:52:52,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490994828] [2022-01-31 17:52:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:52,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:52:52,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:52:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:52:52,766 INFO L87 Difference]: Start difference. First operand 550 states and 658 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:59,076 INFO L93 Difference]: Finished difference Result 889 states and 1108 transitions. [2022-01-31 17:52:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:52:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 545 [2022-01-31 17:52:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:59,078 INFO L225 Difference]: With dead ends: 889 [2022-01-31 17:52:59,078 INFO L226 Difference]: Without dead ends: 558 [2022-01-31 17:52:59,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:52:59,080 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1679 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:59,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 52 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:52:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-31 17:52:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 555. [2022-01-31 17:52:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 549 states have (on average 1.2003642987249545) internal successors, (659), 549 states have internal predecessors, (659), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 664 transitions. [2022-01-31 17:52:59,299 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 664 transitions. Word has length 545 [2022-01-31 17:52:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:59,299 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 664 transitions. [2022-01-31 17:52:59,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 664 transitions. [2022-01-31 17:52:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 17:52:59,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:59,301 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:59,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:52:59,301 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:59,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1896094704, now seen corresponding path program 107 times [2022-01-31 17:52:59,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:59,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196124676] [2022-01-31 17:52:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:59,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:59,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:59,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:59,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:02,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:02,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:02,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196124676] [2022-01-31 17:53:02,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [196124676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:02,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:02,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:53:02,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729799397] [2022-01-31 17:53:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:02,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:53:02,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:53:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:53:02,867 INFO L87 Difference]: Start difference. First operand 555 states and 664 transitions. Second operand has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:09,304 INFO L93 Difference]: Finished difference Result 897 states and 1118 transitions. [2022-01-31 17:53:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:53:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 550 [2022-01-31 17:53:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:09,306 INFO L225 Difference]: With dead ends: 897 [2022-01-31 17:53:09,306 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 17:53:09,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:53:09,308 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1825 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:09,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1826 Valid, 42 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:53:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 17:53:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 560. [2022-01-31 17:53:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 554 states have (on average 1.2003610108303249) internal successors, (665), 554 states have internal predecessors, (665), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 670 transitions. [2022-01-31 17:53:09,538 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 670 transitions. Word has length 550 [2022-01-31 17:53:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:09,538 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 670 transitions. [2022-01-31 17:53:09,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 670 transitions. [2022-01-31 17:53:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:53:09,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:09,540 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:09,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:53:09,541 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash -281056414, now seen corresponding path program 108 times [2022-01-31 17:53:09,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:09,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201046296] [2022-01-31 17:53:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:09,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:09,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:09,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:09,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:13,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:13,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:13,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201046296] [2022-01-31 17:53:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201046296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:13,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:53:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622967] [2022-01-31 17:53:13,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:13,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:53:13,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:53:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:53:13,131 INFO L87 Difference]: Start difference. First operand 560 states and 670 transitions. Second operand has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:19,638 INFO L93 Difference]: Finished difference Result 905 states and 1128 transitions. [2022-01-31 17:53:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:53:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:53:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:19,640 INFO L225 Difference]: With dead ends: 905 [2022-01-31 17:53:19,640 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 17:53:19,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:53:19,642 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1962 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:19,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1963 Valid, 37 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:53:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 17:53:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 565. [2022-01-31 17:53:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 559 states have (on average 1.2003577817531306) internal successors, (671), 559 states have internal predecessors, (671), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 676 transitions. [2022-01-31 17:53:19,899 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 676 transitions. Word has length 555 [2022-01-31 17:53:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:19,899 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 676 transitions. [2022-01-31 17:53:19,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 676 transitions. [2022-01-31 17:53:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-01-31 17:53:19,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:19,901 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:19,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:53:19,901 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:19,902 INFO L85 PathProgramCache]: Analyzing trace with hash 841302868, now seen corresponding path program 109 times [2022-01-31 17:53:19,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:19,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472687877] [2022-01-31 17:53:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:19,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:19,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:19,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:19,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:23,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:23,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472687877] [2022-01-31 17:53:23,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472687877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:23,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:23,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:53:23,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463146541] [2022-01-31 17:53:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:23,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:53:23,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:53:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:53:23,541 INFO L87 Difference]: Start difference. First operand 565 states and 676 transitions. Second operand has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:30,276 INFO L93 Difference]: Finished difference Result 913 states and 1138 transitions. [2022-01-31 17:53:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:53:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 560 [2022-01-31 17:53:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:30,277 INFO L225 Difference]: With dead ends: 913 [2022-01-31 17:53:30,277 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 17:53:30,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:53:30,280 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1799 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:30,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1800 Valid, 57 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:53:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 17:53:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 570. [2022-01-31 17:53:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 564 states have (on average 1.200354609929078) internal successors, (677), 564 states have internal predecessors, (677), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 682 transitions. [2022-01-31 17:53:30,534 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 682 transitions. Word has length 560 [2022-01-31 17:53:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 682 transitions. [2022-01-31 17:53:30,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 682 transitions. [2022-01-31 17:53:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-01-31 17:53:30,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:30,537 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:53:30,537 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1823426590, now seen corresponding path program 110 times [2022-01-31 17:53:30,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:30,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476337765] [2022-01-31 17:53:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:30,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:30,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:30,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:30,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:34,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:34,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476337765] [2022-01-31 17:53:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476337765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:34,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:34,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:53:34,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594319954] [2022-01-31 17:53:34,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:34,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:53:34,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:53:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:53:34,292 INFO L87 Difference]: Start difference. First operand 570 states and 682 transitions. Second operand has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:41,058 INFO L93 Difference]: Finished difference Result 921 states and 1148 transitions. [2022-01-31 17:53:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:53:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 565 [2022-01-31 17:53:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:41,060 INFO L225 Difference]: With dead ends: 921 [2022-01-31 17:53:41,060 INFO L226 Difference]: Without dead ends: 578 [2022-01-31 17:53:41,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:53:41,063 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2026 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:41,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2027 Valid, 42 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:53:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-31 17:53:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 575. [2022-01-31 17:53:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 569 states have (on average 1.2003514938488578) internal successors, (683), 569 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 688 transitions. [2022-01-31 17:53:41,325 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 688 transitions. Word has length 565 [2022-01-31 17:53:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:41,325 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 688 transitions. [2022-01-31 17:53:41,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 688 transitions. [2022-01-31 17:53:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-01-31 17:53:41,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:41,327 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:41,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:53:41,328 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2014198424, now seen corresponding path program 111 times [2022-01-31 17:53:41,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:41,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274141018] [2022-01-31 17:53:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:41,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:41,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:41,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:41,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:44,990 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274141018] [2022-01-31 17:53:44,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274141018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:44,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:44,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:53:44,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739133281] [2022-01-31 17:53:44,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:44,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:53:44,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:53:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:53:44,993 INFO L87 Difference]: Start difference. First operand 575 states and 688 transitions. Second operand has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:51,543 INFO L93 Difference]: Finished difference Result 929 states and 1158 transitions. [2022-01-31 17:53:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:53:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 570 [2022-01-31 17:53:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:51,544 INFO L225 Difference]: With dead ends: 929 [2022-01-31 17:53:51,544 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 17:53:51,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:53:51,547 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2349 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2350 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:51,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2350 Valid, 57 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:53:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 17:53:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 580. [2022-01-31 17:53:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 574 states have (on average 1.2003484320557491) internal successors, (689), 574 states have internal predecessors, (689), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 694 transitions. [2022-01-31 17:53:51,784 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 694 transitions. Word has length 570 [2022-01-31 17:53:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:51,784 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 694 transitions. [2022-01-31 17:53:51,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 694 transitions. [2022-01-31 17:53:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-01-31 17:53:51,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:51,786 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:51,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:53:51,787 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1170510630, now seen corresponding path program 112 times [2022-01-31 17:53:51,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:51,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466760677] [2022-01-31 17:53:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:51,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:51,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:51,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:51,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:55,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:55,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466760677] [2022-01-31 17:53:55,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466760677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:55,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:55,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:53:55,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833168837] [2022-01-31 17:53:55,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:55,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:53:55,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:55,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:53:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:53:55,520 INFO L87 Difference]: Start difference. First operand 580 states and 694 transitions. Second operand has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:02,106 INFO L93 Difference]: Finished difference Result 937 states and 1168 transitions. [2022-01-31 17:54:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:54:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 575 [2022-01-31 17:54:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:02,108 INFO L225 Difference]: With dead ends: 937 [2022-01-31 17:54:02,108 INFO L226 Difference]: Without dead ends: 588 [2022-01-31 17:54:02,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:54:02,110 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1871 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:02,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1872 Valid, 42 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:54:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-31 17:54:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 585. [2022-01-31 17:54:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 579 states have (on average 1.2003454231433506) internal successors, (695), 579 states have internal predecessors, (695), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 700 transitions. [2022-01-31 17:54:02,369 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 700 transitions. Word has length 575 [2022-01-31 17:54:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:02,369 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 700 transitions. [2022-01-31 17:54:02,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 700 transitions. [2022-01-31 17:54:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2022-01-31 17:54:02,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:02,371 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:02,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:54:02,371 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1908345308, now seen corresponding path program 113 times [2022-01-31 17:54:02,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:02,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195200409] [2022-01-31 17:54:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:02,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:02,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:02,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:02,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:06,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:06,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195200409] [2022-01-31 17:54:06,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195200409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:06,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:06,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:54:06,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704318822] [2022-01-31 17:54:06,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:06,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:54:06,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:54:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:54:06,182 INFO L87 Difference]: Start difference. First operand 585 states and 700 transitions. Second operand has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:13,037 INFO L93 Difference]: Finished difference Result 945 states and 1178 transitions. [2022-01-31 17:54:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:54:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 580 [2022-01-31 17:54:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:13,038 INFO L225 Difference]: With dead ends: 945 [2022-01-31 17:54:13,038 INFO L226 Difference]: Without dead ends: 593 [2022-01-31 17:54:13,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:54:13,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2092 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:13,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 52 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:54:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-31 17:54:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2022-01-31 17:54:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 584 states have (on average 1.2003424657534247) internal successors, (701), 584 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 706 transitions. [2022-01-31 17:54:13,285 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 706 transitions. Word has length 580 [2022-01-31 17:54:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:13,285 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 706 transitions. [2022-01-31 17:54:13,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 706 transitions. [2022-01-31 17:54:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-01-31 17:54:13,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:13,287 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:54:13,287 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1088133526, now seen corresponding path program 114 times [2022-01-31 17:54:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503586263] [2022-01-31 17:54:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:13,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:13,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:13,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:13,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:17,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:17,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:17,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503586263] [2022-01-31 17:54:17,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [503586263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:17,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:17,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:54:17,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106909135] [2022-01-31 17:54:17,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:17,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:54:17,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:54:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:54:17,148 INFO L87 Difference]: Start difference. First operand 590 states and 706 transitions. Second operand has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:24,070 INFO L93 Difference]: Finished difference Result 953 states and 1188 transitions. [2022-01-31 17:54:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:54:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 585 [2022-01-31 17:54:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:24,071 INFO L225 Difference]: With dead ends: 953 [2022-01-31 17:54:24,071 INFO L226 Difference]: Without dead ends: 598 [2022-01-31 17:54:24,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:54:24,073 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2226 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:24,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 47 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:54:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-31 17:54:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 595. [2022-01-31 17:54:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 589 states have (on average 1.2003395585738539) internal successors, (707), 589 states have internal predecessors, (707), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 712 transitions. [2022-01-31 17:54:24,319 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 712 transitions. Word has length 585 [2022-01-31 17:54:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:24,319 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 712 transitions. [2022-01-31 17:54:24,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 712 transitions. [2022-01-31 17:54:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-01-31 17:54:24,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:24,321 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:24,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:54:24,321 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:24,321 INFO L85 PathProgramCache]: Analyzing trace with hash -314576608, now seen corresponding path program 115 times [2022-01-31 17:54:24,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:24,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300454014] [2022-01-31 17:54:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:24,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:24,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:24,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:24,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:28,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:28,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300454014] [2022-01-31 17:54:28,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [300454014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:28,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:28,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:54:28,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213617526] [2022-01-31 17:54:28,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:28,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:54:28,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:54:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:54:28,215 INFO L87 Difference]: Start difference. First operand 595 states and 712 transitions. Second operand has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:35,391 INFO L93 Difference]: Finished difference Result 961 states and 1198 transitions. [2022-01-31 17:54:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:54:35,392 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 590 [2022-01-31 17:54:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:35,392 INFO L225 Difference]: With dead ends: 961 [2022-01-31 17:54:35,393 INFO L226 Difference]: Without dead ends: 603 [2022-01-31 17:54:35,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:54:35,395 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1922 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:35,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 47 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:54:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-31 17:54:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 600. [2022-01-31 17:54:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 594 states have (on average 1.2003367003367003) internal successors, (713), 594 states have internal predecessors, (713), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 718 transitions. [2022-01-31 17:54:35,644 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 718 transitions. Word has length 590 [2022-01-31 17:54:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:35,645 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 718 transitions. [2022-01-31 17:54:35,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 718 transitions. [2022-01-31 17:54:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-01-31 17:54:35,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:35,647 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:35,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:54:35,647 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1250397778, now seen corresponding path program 116 times [2022-01-31 17:54:35,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:35,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65657884] [2022-01-31 17:54:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:35,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:35,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:35,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:35,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:39,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:39,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:39,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65657884] [2022-01-31 17:54:39,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [65657884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:39,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:39,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:54:39,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925183901] [2022-01-31 17:54:39,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:39,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:54:39,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:54:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:54:39,667 INFO L87 Difference]: Start difference. First operand 600 states and 718 transitions. Second operand has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:46,977 INFO L93 Difference]: Finished difference Result 969 states and 1208 transitions. [2022-01-31 17:54:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:54:46,977 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 595 [2022-01-31 17:54:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:46,978 INFO L225 Difference]: With dead ends: 969 [2022-01-31 17:54:46,978 INFO L226 Difference]: Without dead ends: 608 [2022-01-31 17:54:46,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:54:46,980 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1942 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1943 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:46,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1943 Valid, 77 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:54:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-31 17:54:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2022-01-31 17:54:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 599 states have (on average 1.2003338898163607) internal successors, (719), 599 states have internal predecessors, (719), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 724 transitions. [2022-01-31 17:54:47,240 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 724 transitions. Word has length 595 [2022-01-31 17:54:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:47,240 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 724 transitions. [2022-01-31 17:54:47,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 724 transitions. [2022-01-31 17:54:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2022-01-31 17:54:47,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:47,242 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:47,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:54:47,242 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash 966340708, now seen corresponding path program 117 times [2022-01-31 17:54:47,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:47,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257930230] [2022-01-31 17:54:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:47,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:47,244 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:47,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:47,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:51,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:51,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257930230] [2022-01-31 17:54:51,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257930230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:51,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:51,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:54:51,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761850969] [2022-01-31 17:54:51,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:51,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:54:51,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:54:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:54:51,326 INFO L87 Difference]: Start difference. First operand 605 states and 724 transitions. Second operand has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:58,647 INFO L93 Difference]: Finished difference Result 977 states and 1218 transitions. [2022-01-31 17:54:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:54:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 600 [2022-01-31 17:54:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:58,648 INFO L225 Difference]: With dead ends: 977 [2022-01-31 17:54:58,648 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 17:54:58,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:54:58,651 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1962 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:58,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1963 Valid, 52 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:54:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 17:54:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 610. [2022-01-31 17:54:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 604 states have (on average 1.2003311258278146) internal successors, (725), 604 states have internal predecessors, (725), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 730 transitions. [2022-01-31 17:54:58,913 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 730 transitions. Word has length 600 [2022-01-31 17:54:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 730 transitions. [2022-01-31 17:54:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 730 transitions. [2022-01-31 17:54:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-01-31 17:54:58,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:58,915 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:58,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:54:58,916 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1043794702, now seen corresponding path program 118 times [2022-01-31 17:54:58,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:58,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003534574] [2022-01-31 17:54:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:58,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:58,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:58,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:58,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:03,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:03,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003534574] [2022-01-31 17:55:03,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1003534574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:03,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:03,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:55:03,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257553539] [2022-01-31 17:55:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:55:03,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:55:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:55:03,058 INFO L87 Difference]: Start difference. First operand 610 states and 730 transitions. Second operand has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:10,706 INFO L93 Difference]: Finished difference Result 985 states and 1228 transitions. [2022-01-31 17:55:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:55:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 605 [2022-01-31 17:55:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:10,707 INFO L225 Difference]: With dead ends: 985 [2022-01-31 17:55:10,707 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 17:55:10,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:55:10,709 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2462 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2463 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:10,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2463 Valid, 47 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:55:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 17:55:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 615. [2022-01-31 17:55:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 609 states have (on average 1.200328407224959) internal successors, (731), 609 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 736 transitions. [2022-01-31 17:55:10,998 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 736 transitions. Word has length 605 [2022-01-31 17:55:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:10,998 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 736 transitions. [2022-01-31 17:55:10,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 736 transitions. [2022-01-31 17:55:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2022-01-31 17:55:11,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:11,000 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:11,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:55:11,000 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash -355268696, now seen corresponding path program 119 times [2022-01-31 17:55:11,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:11,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64114465] [2022-01-31 17:55:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:11,002 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:11,002 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:11,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:11,009 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:15,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:15,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64114465] [2022-01-31 17:55:15,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [64114465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:15,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:15,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:55:15,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017606714] [2022-01-31 17:55:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:55:15,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:55:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:55:15,212 INFO L87 Difference]: Start difference. First operand 615 states and 736 transitions. Second operand has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:23,042 INFO L93 Difference]: Finished difference Result 993 states and 1238 transitions. [2022-01-31 17:55:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:55:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 610 [2022-01-31 17:55:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:23,043 INFO L225 Difference]: With dead ends: 993 [2022-01-31 17:55:23,043 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 17:55:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:55:23,046 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1996 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:23,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 62 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:55:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 17:55:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2022-01-31 17:55:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 614 states have (on average 1.200325732899023) internal successors, (737), 614 states have internal predecessors, (737), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 742 transitions. [2022-01-31 17:55:23,317 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 742 transitions. Word has length 610 [2022-01-31 17:55:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:23,318 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 742 transitions. [2022-01-31 17:55:23,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 742 transitions. [2022-01-31 17:55:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-31 17:55:23,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:23,320 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:23,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:55:23,320 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -605958198, now seen corresponding path program 120 times [2022-01-31 17:55:23,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:23,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113895879] [2022-01-31 17:55:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:23,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:23,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:23,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:23,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:27,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:27,596 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:27,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113895879] [2022-01-31 17:55:27,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113895879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:27,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:27,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:55:27,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109002098] [2022-01-31 17:55:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:27,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:55:27,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:27,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:55:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:55:27,598 INFO L87 Difference]: Start difference. First operand 620 states and 742 transitions. Second operand has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:35,421 INFO L93 Difference]: Finished difference Result 1001 states and 1248 transitions. [2022-01-31 17:55:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:55:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 615 [2022-01-31 17:55:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:35,422 INFO L225 Difference]: With dead ends: 1001 [2022-01-31 17:55:35,422 INFO L226 Difference]: Without dead ends: 628 [2022-01-31 17:55:35,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:55:35,425 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2205 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:35,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2206 Valid, 47 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:55:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-31 17:55:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 625. [2022-01-31 17:55:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 619 states have (on average 1.2003231017770597) internal successors, (743), 619 states have internal predecessors, (743), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 748 transitions. [2022-01-31 17:55:35,697 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 748 transitions. Word has length 615 [2022-01-31 17:55:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:35,697 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 748 transitions. [2022-01-31 17:55:35,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 748 transitions. [2022-01-31 17:55:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-01-31 17:55:35,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:35,699 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:35,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:55:35,699 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1644841236, now seen corresponding path program 121 times [2022-01-31 17:55:35,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872630293] [2022-01-31 17:55:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:35,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:35,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:35,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:35,708 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:40,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872630293] [2022-01-31 17:55:40,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [872630293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:40,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:40,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:55:40,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614458643] [2022-01-31 17:55:40,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:40,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:55:40,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:55:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:55:40,063 INFO L87 Difference]: Start difference. First operand 625 states and 748 transitions. Second operand has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:48,067 INFO L93 Difference]: Finished difference Result 1009 states and 1258 transitions. [2022-01-31 17:55:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:55:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 620 [2022-01-31 17:55:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:48,068 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 17:55:48,068 INFO L226 Difference]: Without dead ends: 633 [2022-01-31 17:55:48,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:55:48,071 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2198 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:48,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2199 Valid, 52 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:55:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-31 17:55:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 630. [2022-01-31 17:55:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 624 states have (on average 1.2003205128205128) internal successors, (749), 624 states have internal predecessors, (749), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 754 transitions. [2022-01-31 17:55:48,353 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 754 transitions. Word has length 620 [2022-01-31 17:55:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:48,353 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 754 transitions. [2022-01-31 17:55:48,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 754 transitions. [2022-01-31 17:55:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2022-01-31 17:55:48,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:48,355 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:48,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:55:48,355 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2021629062, now seen corresponding path program 122 times [2022-01-31 17:55:48,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:48,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513016313] [2022-01-31 17:55:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:48,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:48,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:48,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:48,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:52,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:52,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513016313] [2022-01-31 17:55:52,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [513016313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:52,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:52,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:55:52,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312274765] [2022-01-31 17:55:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:55:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:55:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:55:52,797 INFO L87 Difference]: Start difference. First operand 630 states and 754 transitions. Second operand has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:00,946 INFO L93 Difference]: Finished difference Result 1017 states and 1268 transitions. [2022-01-31 17:56:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:56:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 625 [2022-01-31 17:56:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:00,947 INFO L225 Difference]: With dead ends: 1017 [2022-01-31 17:56:00,947 INFO L226 Difference]: Without dead ends: 638 [2022-01-31 17:56:00,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:56:00,950 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2374 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:00,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 37 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:56:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-31 17:56:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 635. [2022-01-31 17:56:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 629 states have (on average 1.2003179650238474) internal successors, (755), 629 states have internal predecessors, (755), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 760 transitions. [2022-01-31 17:56:01,248 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 760 transitions. Word has length 625 [2022-01-31 17:56:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:01,248 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 760 transitions. [2022-01-31 17:56:01,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 760 transitions. [2022-01-31 17:56:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2022-01-31 17:56:01,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:01,251 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:01,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:56:01,251 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1123451344, now seen corresponding path program 123 times [2022-01-31 17:56:01,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:01,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052613155] [2022-01-31 17:56:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:01,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:01,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:01,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:01,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:05,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:05,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:05,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052613155] [2022-01-31 17:56:05,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052613155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:05,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:05,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:56:05,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426628295] [2022-01-31 17:56:05,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:05,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:56:05,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:56:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:56:05,695 INFO L87 Difference]: Start difference. First operand 635 states and 760 transitions. Second operand has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:14,061 INFO L93 Difference]: Finished difference Result 1025 states and 1278 transitions. [2022-01-31 17:56:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:56:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 630 [2022-01-31 17:56:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:14,063 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 17:56:14,063 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 17:56:14,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:56:14,065 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2134 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:14,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2134 Valid, 47 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:56:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 17:56:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 640. [2022-01-31 17:56:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 634 states have (on average 1.2003154574132493) internal successors, (761), 634 states have internal predecessors, (761), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 766 transitions. [2022-01-31 17:56:14,354 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 766 transitions. Word has length 630 [2022-01-31 17:56:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:14,354 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 766 transitions. [2022-01-31 17:56:14,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 766 transitions. [2022-01-31 17:56:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-01-31 17:56:14,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:14,357 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:14,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:56:14,357 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash 973615426, now seen corresponding path program 124 times [2022-01-31 17:56:14,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:14,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171249711] [2022-01-31 17:56:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:14,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:14,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:14,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:14,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:18,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:18,867 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171249711] [2022-01-31 17:56:18,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171249711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:18,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:18,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:56:18,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679554499] [2022-01-31 17:56:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:18,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:56:18,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:56:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:56:18,869 INFO L87 Difference]: Start difference. First operand 640 states and 766 transitions. Second operand has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,471 INFO L93 Difference]: Finished difference Result 1033 states and 1288 transitions. [2022-01-31 17:56:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:56:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 635 [2022-01-31 17:56:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,472 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 17:56:27,472 INFO L226 Difference]: Without dead ends: 648 [2022-01-31 17:56:27,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:56:27,475 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2255 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2256 Valid, 47 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:56:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-31 17:56:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 645. [2022-01-31 17:56:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 639 states have (on average 1.2003129890453834) internal successors, (767), 639 states have internal predecessors, (767), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 772 transitions. [2022-01-31 17:56:27,769 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 772 transitions. Word has length 635 [2022-01-31 17:56:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,769 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 772 transitions. [2022-01-31 17:56:27,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 772 transitions. [2022-01-31 17:56:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-01-31 17:56:27,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,772 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:56:27,772 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1125555572, now seen corresponding path program 125 times [2022-01-31 17:56:27,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511588776] [2022-01-31 17:56:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:27,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:27,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,782 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:32,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:32,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511588776] [2022-01-31 17:56:32,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [511588776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:32,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:32,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:56:32,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280712016] [2022-01-31 17:56:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:32,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:56:32,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:56:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:56:32,357 INFO L87 Difference]: Start difference. First operand 645 states and 772 transitions. Second operand has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:41,017 INFO L93 Difference]: Finished difference Result 1041 states and 1298 transitions. [2022-01-31 17:56:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:56:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 640 [2022-01-31 17:56:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:41,019 INFO L225 Difference]: With dead ends: 1041 [2022-01-31 17:56:41,019 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 17:56:41,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:56:41,022 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1906 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:41,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 57 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:56:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 17:56:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 650. [2022-01-31 17:56:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 644 states have (on average 1.200310559006211) internal successors, (773), 644 states have internal predecessors, (773), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 778 transitions. [2022-01-31 17:56:41,341 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 778 transitions. Word has length 640 [2022-01-31 17:56:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:41,341 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 778 transitions. [2022-01-31 17:56:41,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 778 transitions. [2022-01-31 17:56:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-01-31 17:56:41,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:41,343 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:41,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:56:41,343 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1400065534, now seen corresponding path program 126 times [2022-01-31 17:56:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487521900] [2022-01-31 17:56:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:41,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:41,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:41,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:41,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:46,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:46,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:46,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487521900] [2022-01-31 17:56:46,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487521900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:46,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:46,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:56:46,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544357978] [2022-01-31 17:56:46,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:46,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:56:46,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:56:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:56:46,028 INFO L87 Difference]: Start difference. First operand 650 states and 778 transitions. Second operand has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:54,907 INFO L93 Difference]: Finished difference Result 1049 states and 1308 transitions. [2022-01-31 17:56:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:56:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 645 [2022-01-31 17:56:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:54,909 INFO L225 Difference]: With dead ends: 1049 [2022-01-31 17:56:54,909 INFO L226 Difference]: Without dead ends: 658 [2022-01-31 17:56:54,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:56:54,912 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2571 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2572 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:54,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2572 Valid, 32 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:56:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-31 17:56:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 655. [2022-01-31 17:56:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 649 states have (on average 1.2003081664098614) internal successors, (779), 649 states have internal predecessors, (779), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 784 transitions. [2022-01-31 17:56:55,220 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 784 transitions. Word has length 645 [2022-01-31 17:56:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:55,220 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 784 transitions. [2022-01-31 17:56:55,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 784 transitions. [2022-01-31 17:56:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-01-31 17:56:55,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:55,222 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:55,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:56:55,223 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2145037128, now seen corresponding path program 127 times [2022-01-31 17:56:55,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596588914] [2022-01-31 17:56:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:55,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:55,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:55,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:55,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:59,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:59,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:59,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596588914] [2022-01-31 17:56:59,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596588914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:59,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:59,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:56:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603339393] [2022-01-31 17:56:59,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:56:59,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:56:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:56:59,945 INFO L87 Difference]: Start difference. First operand 655 states and 784 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:09,274 INFO L93 Difference]: Finished difference Result 1057 states and 1318 transitions. [2022-01-31 17:57:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:57:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 650 [2022-01-31 17:57:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:09,276 INFO L225 Difference]: With dead ends: 1057 [2022-01-31 17:57:09,276 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 17:57:09,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:57:09,279 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2042 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:09,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2043 Valid, 62 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 17:57:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 660. [2022-01-31 17:57:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 654 states have (on average 1.2003058103975535) internal successors, (785), 654 states have internal predecessors, (785), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 790 transitions. [2022-01-31 17:57:09,589 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 790 transitions. Word has length 650 [2022-01-31 17:57:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:09,590 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 790 transitions. [2022-01-31 17:57:09,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 790 transitions. [2022-01-31 17:57:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2022-01-31 17:57:09,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:09,592 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:09,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:57:09,592 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1085846202, now seen corresponding path program 128 times [2022-01-31 17:57:09,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:09,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763192568] [2022-01-31 17:57:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:09,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:09,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:09,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:09,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:14,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763192568] [2022-01-31 17:57:14,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [763192568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:14,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:14,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:57:14,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712358733] [2022-01-31 17:57:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:14,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:57:14,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:57:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:57:14,465 INFO L87 Difference]: Start difference. First operand 660 states and 790 transitions. Second operand has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:23,744 INFO L93 Difference]: Finished difference Result 1065 states and 1328 transitions. [2022-01-31 17:57:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:57:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 655 [2022-01-31 17:57:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:23,745 INFO L225 Difference]: With dead ends: 1065 [2022-01-31 17:57:23,745 INFO L226 Difference]: Without dead ends: 668 [2022-01-31 17:57:23,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:57:23,748 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2410 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2411 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:23,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2411 Valid, 37 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-31 17:57:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 665. [2022-01-31 17:57:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 659 states have (on average 1.2003034901365706) internal successors, (791), 659 states have internal predecessors, (791), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 796 transitions. [2022-01-31 17:57:24,084 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 796 transitions. Word has length 655 [2022-01-31 17:57:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:24,084 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 796 transitions. [2022-01-31 17:57:24,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 796 transitions. [2022-01-31 17:57:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2022-01-31 17:57:24,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:24,087 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:24,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:57:24,087 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash -583146500, now seen corresponding path program 129 times [2022-01-31 17:57:24,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937776483] [2022-01-31 17:57:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:24,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:24,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:24,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:24,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:28,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937776483] [2022-01-31 17:57:28,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [937776483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:28,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:28,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:57:28,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153943096] [2022-01-31 17:57:28,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:28,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:57:28,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:57:28,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:57:28,979 INFO L87 Difference]: Start difference. First operand 665 states and 796 transitions. Second operand has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:38,431 INFO L93 Difference]: Finished difference Result 1073 states and 1338 transitions. [2022-01-31 17:57:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:57:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 660 [2022-01-31 17:57:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:38,433 INFO L225 Difference]: With dead ends: 1073 [2022-01-31 17:57:38,433 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 17:57:38,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:57:38,436 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2565 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2566 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:38,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2566 Valid, 52 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:57:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 17:57:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 670. [2022-01-31 17:57:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 664 states have (on average 1.2003012048192772) internal successors, (797), 664 states have internal predecessors, (797), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 802 transitions. [2022-01-31 17:57:38,754 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 802 transitions. Word has length 660 [2022-01-31 17:57:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:38,754 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 802 transitions. [2022-01-31 17:57:38,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 802 transitions. [2022-01-31 17:57:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2022-01-31 17:57:38,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:38,757 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:38,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:57:38,757 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash 47193974, now seen corresponding path program 130 times [2022-01-31 17:57:38,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:38,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395913426] [2022-01-31 17:57:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:38,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:38,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:38,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:38,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:43,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395913426] [2022-01-31 17:57:43,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395913426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:43,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:43,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:57:43,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437889918] [2022-01-31 17:57:43,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:43,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:57:43,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:57:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:57:43,751 INFO L87 Difference]: Start difference. First operand 670 states and 802 transitions. Second operand has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:53,301 INFO L93 Difference]: Finished difference Result 1081 states and 1348 transitions. [2022-01-31 17:57:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:57:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 665 [2022-01-31 17:57:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:53,315 INFO L225 Difference]: With dead ends: 1081 [2022-01-31 17:57:53,315 INFO L226 Difference]: Without dead ends: 678 [2022-01-31 17:57:53,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:57:53,318 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2105 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:53,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 57 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:57:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-31 17:57:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2022-01-31 17:57:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 669 states have (on average 1.2002989536621824) internal successors, (803), 669 states have internal predecessors, (803), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 808 transitions. [2022-01-31 17:57:53,637 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 808 transitions. Word has length 665 [2022-01-31 17:57:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:53,637 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 808 transitions. [2022-01-31 17:57:53,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 808 transitions. [2022-01-31 17:57:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2022-01-31 17:57:53,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:53,640 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:53,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:57:53,640 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1603761344, now seen corresponding path program 131 times [2022-01-31 17:57:53,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:53,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292329146] [2022-01-31 17:57:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:53,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:53,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:53,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:53,649 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:58,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:58,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292329146] [2022-01-31 17:57:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292329146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:58,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:58,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:57:58,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115532728] [2022-01-31 17:57:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:58,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:57:58,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:57:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:57:58,656 INFO L87 Difference]: Start difference. First operand 675 states and 808 transitions. Second operand has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:08,551 INFO L93 Difference]: Finished difference Result 1089 states and 1358 transitions. [2022-01-31 17:58:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:58:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 670 [2022-01-31 17:58:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:08,552 INFO L225 Difference]: With dead ends: 1089 [2022-01-31 17:58:08,553 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 17:58:08,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:58:08,556 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2203 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2204 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:08,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2204 Valid, 67 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 17:58:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 680. [2022-01-31 17:58:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 674 states have (on average 1.2002967359050445) internal successors, (809), 674 states have internal predecessors, (809), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 814 transitions. [2022-01-31 17:58:08,887 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 814 transitions. Word has length 670 [2022-01-31 17:58:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 814 transitions. [2022-01-31 17:58:08,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 814 transitions. [2022-01-31 17:58:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 17:58:08,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:08,890 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:08,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:58:08,890 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1538348082, now seen corresponding path program 132 times [2022-01-31 17:58:08,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317125082] [2022-01-31 17:58:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:08,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:08,892 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:08,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:08,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:14,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:14,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317125082] [2022-01-31 17:58:14,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317125082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:14,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:14,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:58:14,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188447871] [2022-01-31 17:58:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:14,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:58:14,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:58:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:58:14,036 INFO L87 Difference]: Start difference. First operand 680 states and 814 transitions. Second operand has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:24,006 INFO L93 Difference]: Finished difference Result 1097 states and 1368 transitions. [2022-01-31 17:58:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:58:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 675 [2022-01-31 17:58:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:24,007 INFO L225 Difference]: With dead ends: 1097 [2022-01-31 17:58:24,007 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 17:58:24,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:58:24,010 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2409 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2410 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:24,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2410 Valid, 57 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 17:58:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 685. [2022-01-31 17:58:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 679 states have (on average 1.2002945508100147) internal successors, (815), 679 states have internal predecessors, (815), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 820 transitions. [2022-01-31 17:58:24,343 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 820 transitions. Word has length 675 [2022-01-31 17:58:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:24,343 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 820 transitions. [2022-01-31 17:58:24,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 820 transitions. [2022-01-31 17:58:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-01-31 17:58:24,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:24,346 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:58:24,346 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1330804092, now seen corresponding path program 133 times [2022-01-31 17:58:24,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116793480] [2022-01-31 17:58:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:24,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:24,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:24,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:24,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:29,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:29,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116793480] [2022-01-31 17:58:29,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116793480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:29,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:29,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:58:29,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553454836] [2022-01-31 17:58:29,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:58:29,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:29,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:58:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:58:29,550 INFO L87 Difference]: Start difference. First operand 685 states and 820 transitions. Second operand has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:39,829 INFO L93 Difference]: Finished difference Result 1105 states and 1378 transitions. [2022-01-31 17:58:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:58:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 680 [2022-01-31 17:58:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:39,830 INFO L225 Difference]: With dead ends: 1105 [2022-01-31 17:58:39,831 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 17:58:39,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:58:39,834 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2342 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2343 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:39,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2343 Valid, 52 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:58:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 17:58:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 690. [2022-01-31 17:58:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 684 states have (on average 1.2002923976608186) internal successors, (821), 684 states have internal predecessors, (821), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 826 transitions. [2022-01-31 17:58:40,184 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 826 transitions. Word has length 680 [2022-01-31 17:58:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:40,184 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 826 transitions. [2022-01-31 17:58:40,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 826 transitions. [2022-01-31 17:58:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2022-01-31 17:58:40,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:40,187 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:40,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:58:40,187 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash 173281518, now seen corresponding path program 134 times [2022-01-31 17:58:40,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:40,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186854433] [2022-01-31 17:58:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:40,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:40,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:40,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:40,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat