/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:53:20,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:53:20,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:53:20,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 20:53:20,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 20:53:20,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 20:53:20,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 20:53:20,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 20:53:20,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 20:53:20,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 20:53:20,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 20:53:20,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 20:53:20,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:53:20,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:53:20,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:53:20,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:53:20,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:53:20,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:53:20,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:53:20,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:53:20,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:53:20,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:53:20,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:53:20,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:53:20,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 20:53:20,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 20:53:20,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 20:53:20,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 20:53:20,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 20:53:20,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 20:53:20,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 20:53:20,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 20:53:20,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 20:53:20,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 20:53:20,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 20:53:20,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 20:53:20,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 20:53:20,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 20:53:20,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:53:20,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:53:20,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:53:20,380 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 20:53:20,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:53:20,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:53:20,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:53:20,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:53:20,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:53:20,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:53:20,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:53:20,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:53:20,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:53:20,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:53:20,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:53:20,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:53:20,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:53:20,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:53:20,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:53:20,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:53:20,401 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:53:20,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:53:20,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:53:20,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:53:20,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:53:20,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:53:20,650 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:53:20,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2022-01-31 20:53:20,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f415a361/cd86992b01ca4624b3180a51aae80558/FLAG53b947ae4 [2022-01-31 20:53:21,029 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:53:21,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2022-01-31 20:53:21,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f415a361/cd86992b01ca4624b3180a51aae80558/FLAG53b947ae4 [2022-01-31 20:53:21,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f415a361/cd86992b01ca4624b3180a51aae80558 [2022-01-31 20:53:21,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:53:21,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:53:21,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:53:21,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:53:21,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:53:21,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d25015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21, skipping insertion in model container [2022-01-31 20:53:21,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:53:21,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:53:21,618 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2022-01-31 20:53:21,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:53:21,633 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:53:21,643 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2022-01-31 20:53:21,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:53:21,659 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:53:21,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21 WrapperNode [2022-01-31 20:53:21,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:53:21,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:53:21,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:53:21,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:53:21,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:53:21,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:53:21,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:53:21,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:53:21,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (1/1) ... [2022-01-31 20:53:21,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:53:21,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:53:21,718 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 20:53:21,723 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 20:53:21,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:53:21,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:53:21,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:53:21,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:53:21,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:53:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:53:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:53:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:53:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:53:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:53:21,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:53:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:53:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:53:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:53:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:53:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:53:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:53:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:53:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:53:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:53:21,814 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:53:21,815 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:53:21,897 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:53:21,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:53:21,902 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 20:53:21,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:21 BoogieIcfgContainer [2022-01-31 20:53:21,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:53:21,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:53:21,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:53:21,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:53:21,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:53:21" (1/3) ... [2022-01-31 20:53:21,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685c88e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:21, skipping insertion in model container [2022-01-31 20:53:21,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:21" (2/3) ... [2022-01-31 20:53:21,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685c88e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:21, skipping insertion in model container [2022-01-31 20:53:21,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:21" (3/3) ... [2022-01-31 20:53:21,914 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2022-01-31 20:53:21,919 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:53:21,920 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:53:21,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:53:21,958 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 20:53:21,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:53:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:53:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 20:53:21,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:21,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:21,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:22,003 INFO L85 PathProgramCache]: Analyzing trace with hash 56847072, now seen corresponding path program 1 times [2022-01-31 20:53:22,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:22,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91095568] [2022-01-31 20:53:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:22,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:22,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:22,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:22,228 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 20:53:22,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91095568] [2022-01-31 20:53:22,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [91095568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:22,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:22,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:53:22,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814105717] [2022-01-31 20:53:22,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:22,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:53:22,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:53:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:53:22,297 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:22,356 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-01-31 20:53:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:53:22,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 20:53:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:22,368 INFO L225 Difference]: With dead ends: 46 [2022-01-31 20:53:22,369 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 20:53:22,372 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 20:53:22,378 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:22,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 20:53:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 20:53:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:53:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 20:53:22,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 20:53:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:22,423 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 20:53:22,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 20:53:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 20:53:22,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:22,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:22,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:53:22,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1810080346, now seen corresponding path program 1 times [2022-01-31 20:53:22,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:22,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143538917] [2022-01-31 20:53:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:22,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:22,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:22,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:22,509 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 20:53:22,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143538917] [2022-01-31 20:53:22,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143538917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:22,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:22,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:53:22,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966874043] [2022-01-31 20:53:22,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:22,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:53:22,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:53:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:53:22,512 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:22,572 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-31 20:53:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:53:22,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 20:53:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:22,574 INFO L225 Difference]: With dead ends: 43 [2022-01-31 20:53:22,574 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 20:53:22,574 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 20:53:22,576 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:22,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:53:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 20:53:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-31 20:53:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:53:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 20:53:22,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-01-31 20:53:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:22,585 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 20:53:22,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 20:53:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 20:53:22,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:22,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:22,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:53:22,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1733475192, now seen corresponding path program 1 times [2022-01-31 20:53:22,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:22,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067707121] [2022-01-31 20:53:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:22,618 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:22,618 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:22,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:22,622 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:22,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:22,744 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 20:53:22,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:22,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067707121] [2022-01-31 20:53:22,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067707121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:22,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:22,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:53:22,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646922638] [2022-01-31 20:53:22,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:22,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:53:22,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:53:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:53:22,747 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:22,876 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-01-31 20:53:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:53:22,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 20:53:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:22,877 INFO L225 Difference]: With dead ends: 52 [2022-01-31 20:53:22,878 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 20:53:22,878 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 20:53:22,879 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:22,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 29 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:53:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 20:53:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-31 20:53:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:53:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 20:53:22,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2022-01-31 20:53:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:22,894 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 20:53:22,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 20:53:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 20:53:22,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:22,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:22,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:53:22,895 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1130366230, now seen corresponding path program 2 times [2022-01-31 20:53:22,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440363222] [2022-01-31 20:53:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:22,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:22,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:22,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:22,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:23,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:23,043 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 20:53:23,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440363222] [2022-01-31 20:53:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [440363222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:23,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:23,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:53:23,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111237673] [2022-01-31 20:53:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:23,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:53:23,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:53:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:53:23,046 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:23,194 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-01-31 20:53:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:53:23,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 20:53:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:23,196 INFO L225 Difference]: With dead ends: 59 [2022-01-31 20:53:23,196 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 20:53:23,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:53:23,197 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:23,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:53:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 20:53:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-01-31 20:53:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 20:53:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-01-31 20:53:23,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2022-01-31 20:53:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:23,215 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-01-31 20:53:23,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-01-31 20:53:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 20:53:23,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:23,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:23,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:53:23,217 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1363238708, now seen corresponding path program 3 times [2022-01-31 20:53:23,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:23,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902271845] [2022-01-31 20:53:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:23,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:23,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:23,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:23,222 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:23,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:23,322 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 20:53:23,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902271845] [2022-01-31 20:53:23,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [902271845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:23,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:23,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:53:23,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031670631] [2022-01-31 20:53:23,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:23,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:53:23,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:53:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:53:23,325 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 20:53:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:23,578 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-01-31 20:53:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:53:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 20:53:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:23,579 INFO L225 Difference]: With dead ends: 73 [2022-01-31 20:53:23,580 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 20:53:23,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:53:23,581 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:23,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:53:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 20:53:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-01-31 20:53:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 20:53:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-01-31 20:53:23,596 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2022-01-31 20:53:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:23,596 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-01-31 20:53:23,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 20:53:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-01-31 20:53:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 20:53:23,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:23,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:53:23,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1815390674, now seen corresponding path program 4 times [2022-01-31 20:53:23,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:23,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921910842] [2022-01-31 20:53:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:23,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:23,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:23,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:23,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:23,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:23,720 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 20:53:23,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:23,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921910842] [2022-01-31 20:53:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921910842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:23,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:23,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:53:23,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366680511] [2022-01-31 20:53:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:23,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:53:23,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:53:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:53:23,723 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 20:53:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:23,971 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2022-01-31 20:53:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:53:23,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 20:53:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:23,975 INFO L225 Difference]: With dead ends: 85 [2022-01-31 20:53:23,975 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 20:53:23,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:53:23,983 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:23,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 48 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:53:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 20:53:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2022-01-31 20:53:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 20:53:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-01-31 20:53:24,012 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2022-01-31 20:53:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:24,013 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-01-31 20:53:24,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 20:53:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-01-31 20:53:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 20:53:24,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:24,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:24,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:53:24,015 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1753234192, now seen corresponding path program 5 times [2022-01-31 20:53:24,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314012047] [2022-01-31 20:53:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:24,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:24,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:24,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:24,026 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:24,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:24,186 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 20:53:24,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314012047] [2022-01-31 20:53:24,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314012047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:24,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:24,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:53:24,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384462549] [2022-01-31 20:53:24,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:24,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:53:24,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:53:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:53:24,189 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 20:53:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:24,457 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2022-01-31 20:53:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:53:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 20:53:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:24,460 INFO L225 Difference]: With dead ends: 97 [2022-01-31 20:53:24,460 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 20:53:24,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:53:24,462 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:24,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:53:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 20:53:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-01-31 20:53:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 20:53:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-01-31 20:53:24,494 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 24 [2022-01-31 20:53:24,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:24,494 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-01-31 20:53:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 20:53:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-01-31 20:53:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 20:53:24,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:24,495 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:24,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:53:24,495 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash -477139086, now seen corresponding path program 6 times [2022-01-31 20:53:24,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277795289] [2022-01-31 20:53:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:24,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:24,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:24,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:24,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:24,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:24,651 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 20:53:24,652 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277795289] [2022-01-31 20:53:24,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277795289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:24,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:24,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:53:24,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941929901] [2022-01-31 20:53:24,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:24,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:53:24,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:53:24,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:53:24,656 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 20:53:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:24,980 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2022-01-31 20:53:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:53:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 20:53:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:24,981 INFO L225 Difference]: With dead ends: 109 [2022-01-31 20:53:24,982 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 20:53:24,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:53:24,983 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:24,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:53:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 20:53:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-01-31 20:53:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 20:53:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-01-31 20:53:24,998 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2022-01-31 20:53:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:24,999 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-01-31 20:53:24,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 20:53:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-01-31 20:53:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 20:53:24,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:25,000 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:25,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:53:25,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash -677178540, now seen corresponding path program 7 times [2022-01-31 20:53:25,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:25,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880081726] [2022-01-31 20:53:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:25,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:25,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:25,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:25,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:25,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:25,173 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 20:53:25,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:25,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880081726] [2022-01-31 20:53:25,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880081726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:25,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:25,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:53:25,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427825367] [2022-01-31 20:53:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:25,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:53:25,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:53:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:53:25,175 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 20:53:25,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:25,570 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2022-01-31 20:53:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:53:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 20:53:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:25,571 INFO L225 Difference]: With dead ends: 121 [2022-01-31 20:53:25,571 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 20:53:25,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:53:25,572 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:25,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 54 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:53:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 20:53:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-01-31 20:53:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 20:53:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-01-31 20:53:25,588 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 28 [2022-01-31 20:53:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:25,589 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-01-31 20:53:25,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 20:53:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-01-31 20:53:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 20:53:25,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:25,590 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:25,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:53:25,590 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:25,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 358434486, now seen corresponding path program 8 times [2022-01-31 20:53:25,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:25,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512420578] [2022-01-31 20:53:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:25,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:25,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:25,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:25,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:25,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:25,740 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 20:53:25,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512420578] [2022-01-31 20:53:25,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [512420578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:25,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:25,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:53:25,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574191612] [2022-01-31 20:53:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:25,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:53:25,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:53:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:53:25,742 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 20:53:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:26,181 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2022-01-31 20:53:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:53:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 20:53:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:26,182 INFO L225 Difference]: With dead ends: 133 [2022-01-31 20:53:26,182 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 20:53:26,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:53:26,184 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:26,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 56 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:53:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 20:53:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2022-01-31 20:53:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 20:53:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-01-31 20:53:26,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 30 [2022-01-31 20:53:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:26,201 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-01-31 20:53:26,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 20:53:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-01-31 20:53:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 20:53:26,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:26,202 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:26,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:53:26,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash -849860200, now seen corresponding path program 9 times [2022-01-31 20:53:26,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:26,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300395494] [2022-01-31 20:53:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:26,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:26,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:26,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:26,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:26,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:53:26,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300395494] [2022-01-31 20:53:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [300395494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:26,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:26,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:53:26,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547016039] [2022-01-31 20:53:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:26,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:53:26,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:53:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:53:26,361 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 20:53:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:26,896 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2022-01-31 20:53:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:53:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 20:53:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:26,897 INFO L225 Difference]: With dead ends: 145 [2022-01-31 20:53:26,897 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 20:53:26,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:53:26,899 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 106 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:26,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 73 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:53:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 20:53:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2022-01-31 20:53:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 20:53:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-01-31 20:53:26,920 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 32 [2022-01-31 20:53:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:26,920 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-01-31 20:53:26,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 20:53:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-01-31 20:53:26,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 20:53:26,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:26,924 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:26,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:53:26,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1915083770, now seen corresponding path program 10 times [2022-01-31 20:53:26,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:26,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292134054] [2022-01-31 20:53:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:26,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:26,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:26,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:26,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:27,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:53:27,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:27,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292134054] [2022-01-31 20:53:27,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292134054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:27,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:27,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:53:27,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188293409] [2022-01-31 20:53:27,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:27,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:53:27,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:27,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:53:27,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:53:27,110 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 20:53:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:27,667 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2022-01-31 20:53:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:53:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 20:53:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:27,668 INFO L225 Difference]: With dead ends: 157 [2022-01-31 20:53:27,668 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 20:53:27,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:53:27,670 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:27,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 70 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:53:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 20:53:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2022-01-31 20:53:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 20:53:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2022-01-31 20:53:27,696 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 34 [2022-01-31 20:53:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:27,698 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2022-01-31 20:53:27,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 20:53:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2022-01-31 20:53:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 20:53:27,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:27,700 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:27,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:53:27,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 441482716, now seen corresponding path program 11 times [2022-01-31 20:53:27,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927480650] [2022-01-31 20:53:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:27,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:27,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:27,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:27,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:27,882 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 20:53:27,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:27,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927480650] [2022-01-31 20:53:27,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927480650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:27,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:27,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:53:27,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718025513] [2022-01-31 20:53:27,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:27,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:53:27,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:53:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:53:27,884 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 20:53:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:28,593 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2022-01-31 20:53:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:53:28,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 20:53:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:28,595 INFO L225 Difference]: With dead ends: 169 [2022-01-31 20:53:28,595 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 20:53:28,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:53:28,599 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 116 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:28,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 97 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:53:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 20:53:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2022-01-31 20:53:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 20:53:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2022-01-31 20:53:28,624 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 36 [2022-01-31 20:53:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:28,624 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2022-01-31 20:53:28,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 20:53:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2022-01-31 20:53:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 20:53:28,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:28,626 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:28,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:53:28,626 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1650077502, now seen corresponding path program 12 times [2022-01-31 20:53:28,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787108050] [2022-01-31 20:53:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:28,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:28,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:28,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:28,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:28,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:28,848 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 20:53:28,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787108050] [2022-01-31 20:53:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [787108050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:53:28,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054924921] [2022-01-31 20:53:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:28,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:53:28,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:53:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:53:28,850 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 20:53:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:29,632 INFO L93 Difference]: Finished difference Result 181 states and 213 transitions. [2022-01-31 20:53:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:53:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 20:53:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:29,634 INFO L225 Difference]: With dead ends: 181 [2022-01-31 20:53:29,634 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 20:53:29,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:53:29,635 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:29,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 20:53:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2022-01-31 20:53:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 20:53:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2022-01-31 20:53:29,662 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 38 [2022-01-31 20:53:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:29,662 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2022-01-31 20:53:29,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 20:53:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2022-01-31 20:53:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 20:53:29,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:29,666 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:29,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:53:29,666 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash -826470368, now seen corresponding path program 13 times [2022-01-31 20:53:29,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:29,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050543119] [2022-01-31 20:53:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:29,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:29,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:29,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:29,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:29,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:53:29,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050543119] [2022-01-31 20:53:29,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050543119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:29,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:29,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:53:29,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624384481] [2022-01-31 20:53:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:29,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:53:29,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:53:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:53:29,914 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 20:53:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:30,746 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2022-01-31 20:53:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:53:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 20:53:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:30,748 INFO L225 Difference]: With dead ends: 193 [2022-01-31 20:53:30,748 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 20:53:30,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:53:30,749 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 132 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:30,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 111 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 20:53:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2022-01-31 20:53:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 20:53:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-01-31 20:53:30,772 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 40 [2022-01-31 20:53:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-01-31 20:53:30,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 20:53:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-01-31 20:53:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 20:53:30,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:30,773 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:30,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:53:30,773 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1377091454, now seen corresponding path program 14 times [2022-01-31 20:53:30,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:30,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591728127] [2022-01-31 20:53:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:30,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:30,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:30,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:30,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:31,034 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 20:53:31,034 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:31,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591728127] [2022-01-31 20:53:31,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [591728127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:31,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:31,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:53:31,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709199676] [2022-01-31 20:53:31,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:31,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:53:31,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:53:31,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:53:31,035 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 20:53:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:31,872 INFO L93 Difference]: Finished difference Result 205 states and 241 transitions. [2022-01-31 20:53:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:53:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 20:53:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:31,873 INFO L225 Difference]: With dead ends: 205 [2022-01-31 20:53:31,873 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 20:53:31,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:53:31,874 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 161 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:31,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 83 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 20:53:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2022-01-31 20:53:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 20:53:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2022-01-31 20:53:31,898 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 42 [2022-01-31 20:53:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:31,898 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2022-01-31 20:53:31,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 20:53:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2022-01-31 20:53:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:53:31,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:31,899 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:53:31,899 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2051989604, now seen corresponding path program 15 times [2022-01-31 20:53:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248728] [2022-01-31 20:53:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:31,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:31,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:31,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:31,903 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:32,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:32,161 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 20:53:32,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248728] [2022-01-31 20:53:32,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:32,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:32,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:53:32,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302277472] [2022-01-31 20:53:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:32,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:53:32,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:53:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:53:32,163 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 20:53:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:33,214 INFO L93 Difference]: Finished difference Result 217 states and 255 transitions. [2022-01-31 20:53:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:53:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:53:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:33,215 INFO L225 Difference]: With dead ends: 217 [2022-01-31 20:53:33,215 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 20:53:33,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:53:33,217 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 151 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:33,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 120 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:53:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 20:53:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2022-01-31 20:53:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 20:53:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2022-01-31 20:53:33,244 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 44 [2022-01-31 20:53:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:33,244 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2022-01-31 20:53:33,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 20:53:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2022-01-31 20:53:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 20:53:33,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:33,245 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:33,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:53:33,245 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1135996986, now seen corresponding path program 16 times [2022-01-31 20:53:33,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398010280] [2022-01-31 20:53:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:33,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:33,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:33,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:33,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:33,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:33,531 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 20:53:33,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398010280] [2022-01-31 20:53:33,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398010280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:33,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:33,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:53:33,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724456558] [2022-01-31 20:53:33,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:33,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:53:33,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:53:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:53:33,533 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 20:53:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:34,672 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2022-01-31 20:53:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:53:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 20:53:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:34,673 INFO L225 Difference]: With dead ends: 229 [2022-01-31 20:53:34,673 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 20:53:34,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:53:34,674 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 183 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:34,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 87 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:53:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 20:53:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 132. [2022-01-31 20:53:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 20:53:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2022-01-31 20:53:34,704 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 46 [2022-01-31 20:53:34,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:34,705 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2022-01-31 20:53:34,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 20:53:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2022-01-31 20:53:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 20:53:34,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:34,705 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:34,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:53:34,706 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1815539368, now seen corresponding path program 17 times [2022-01-31 20:53:34,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:34,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189687941] [2022-01-31 20:53:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:34,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:34,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:34,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:34,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:34,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:35,001 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 20:53:35,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189687941] [2022-01-31 20:53:35,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189687941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:35,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:35,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:53:35,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566319952] [2022-01-31 20:53:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:35,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:53:35,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:53:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:53:35,003 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 20:53:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:36,209 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-01-31 20:53:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:53:36,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 20:53:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:36,211 INFO L225 Difference]: With dead ends: 241 [2022-01-31 20:53:36,211 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 20:53:36,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:53:36,213 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 164 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:36,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 139 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:53:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 20:53:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2022-01-31 20:53:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 20:53:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2022-01-31 20:53:36,253 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 48 [2022-01-31 20:53:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:36,254 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2022-01-31 20:53:36,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 20:53:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2022-01-31 20:53:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:53:36,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:36,254 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:36,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:53:36,255 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -731407094, now seen corresponding path program 18 times [2022-01-31 20:53:36,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:36,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748305826] [2022-01-31 20:53:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:36,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:36,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:36,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:36,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:36,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:36,598 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 20:53:36,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748305826] [2022-01-31 20:53:36,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748305826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:36,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:36,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:53:36,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761961704] [2022-01-31 20:53:36,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:36,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:53:36,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:36,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:53:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:53:36,600 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 20:53:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:37,758 INFO L93 Difference]: Finished difference Result 253 states and 297 transitions. [2022-01-31 20:53:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:53:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 20:53:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:37,760 INFO L225 Difference]: With dead ends: 253 [2022-01-31 20:53:37,760 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 20:53:37,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:53:37,761 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 220 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:37,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 66 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:53:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 20:53:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2022-01-31 20:53:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 20:53:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2022-01-31 20:53:37,793 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 50 [2022-01-31 20:53:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:37,793 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2022-01-31 20:53:37,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 20:53:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2022-01-31 20:53:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:53:37,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:37,794 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:37,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:53:37,794 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash -215598356, now seen corresponding path program 19 times [2022-01-31 20:53:37,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:37,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223899022] [2022-01-31 20:53:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:37,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:37,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:37,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:37,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:38,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:38,125 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 20:53:38,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223899022] [2022-01-31 20:53:38,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [223899022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:38,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:38,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:53:38,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618128132] [2022-01-31 20:53:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:38,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:53:38,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:53:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:53:38,127 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 20:53:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:39,493 INFO L93 Difference]: Finished difference Result 265 states and 311 transitions. [2022-01-31 20:53:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:53:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 20:53:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:39,494 INFO L225 Difference]: With dead ends: 265 [2022-01-31 20:53:39,495 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 20:53:39,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:53:39,496 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 228 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:39,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 73 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:53:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 20:53:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2022-01-31 20:53:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 20:53:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-01-31 20:53:39,539 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 52 [2022-01-31 20:53:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:39,539 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-01-31 20:53:39,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 20:53:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-01-31 20:53:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:53:39,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:39,540 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:39,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:53:39,540 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1555359822, now seen corresponding path program 20 times [2022-01-31 20:53:39,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608939781] [2022-01-31 20:53:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:39,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:39,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:39,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:39,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:39,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:39,874 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 20:53:39,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608939781] [2022-01-31 20:53:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608939781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:39,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:39,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:53:39,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64656356] [2022-01-31 20:53:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:39,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:53:39,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:53:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:53:39,876 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 20:53:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:41,289 INFO L93 Difference]: Finished difference Result 277 states and 325 transitions. [2022-01-31 20:53:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:53:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 20:53:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:41,291 INFO L225 Difference]: With dead ends: 277 [2022-01-31 20:53:41,291 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 20:53:41,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:53:41,293 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 233 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:41,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 85 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:53:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 20:53:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2022-01-31 20:53:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 20:53:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2022-01-31 20:53:41,328 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 54 [2022-01-31 20:53:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:41,328 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2022-01-31 20:53:41,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 20:53:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2022-01-31 20:53:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:53:41,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:41,329 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:41,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:53:41,329 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1655847632, now seen corresponding path program 21 times [2022-01-31 20:53:41,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:41,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746678134] [2022-01-31 20:53:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:41,331 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:41,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:41,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:41,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:41,696 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 20:53:41,696 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746678134] [2022-01-31 20:53:41,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [746678134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:41,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:41,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:53:41,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691677077] [2022-01-31 20:53:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:41,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:53:41,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:53:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:53:41,698 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 20:53:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:43,305 INFO L93 Difference]: Finished difference Result 289 states and 339 transitions. [2022-01-31 20:53:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:53:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 20:53:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:43,311 INFO L225 Difference]: With dead ends: 289 [2022-01-31 20:53:43,311 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 20:53:43,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:53:43,313 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 241 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3366 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:43,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 92 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3366 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:53:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 20:53:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2022-01-31 20:53:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 20:53:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2022-01-31 20:53:43,349 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 56 [2022-01-31 20:53:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:43,349 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2022-01-31 20:53:43,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 20:53:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2022-01-31 20:53:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:53:43,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:43,350 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:43,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:53:43,350 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 455274898, now seen corresponding path program 22 times [2022-01-31 20:53:43,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:43,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639620394] [2022-01-31 20:53:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:43,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:43,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:43,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:43,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:43,770 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 20:53:43,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:43,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639620394] [2022-01-31 20:53:43,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639620394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:43,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:43,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:53:43,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879238487] [2022-01-31 20:53:43,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:43,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:53:43,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:53:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:53:43,772 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 20:53:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:45,573 INFO L93 Difference]: Finished difference Result 301 states and 353 transitions. [2022-01-31 20:53:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:53:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 20:53:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:45,575 INFO L225 Difference]: With dead ends: 301 [2022-01-31 20:53:45,575 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 20:53:45,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:53:45,576 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 243 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:45,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 109 Invalid, 3960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3767 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:53:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 20:53:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 174. [2022-01-31 20:53:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 25 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 20:53:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2022-01-31 20:53:45,624 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 58 [2022-01-31 20:53:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:45,624 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2022-01-31 20:53:45,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 20:53:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2022-01-31 20:53:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:53:45,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:45,625 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:45,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:53:45,625 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2019462516, now seen corresponding path program 23 times [2022-01-31 20:53:45,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847778532] [2022-01-31 20:53:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:45,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:45,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:45,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:45,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:46,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:46,075 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 20:53:46,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847778532] [2022-01-31 20:53:46,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847778532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:46,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:46,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:53:46,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224282028] [2022-01-31 20:53:46,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:46,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:53:46,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:53:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:53:46,077 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 20:53:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:47,922 INFO L93 Difference]: Finished difference Result 313 states and 367 transitions. [2022-01-31 20:53:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:53:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 20:53:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:47,924 INFO L225 Difference]: With dead ends: 313 [2022-01-31 20:53:47,924 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 20:53:47,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:53:47,926 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 251 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4126 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 4326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 4126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:47,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 116 Invalid, 4326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 4126 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:53:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 20:53:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2022-01-31 20:53:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 20:53:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2022-01-31 20:53:47,980 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 60 [2022-01-31 20:53:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:47,981 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2022-01-31 20:53:47,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 20:53:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2022-01-31 20:53:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:53:47,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:47,982 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:47,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:53:47,982 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1965209814, now seen corresponding path program 24 times [2022-01-31 20:53:47,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:47,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016727155] [2022-01-31 20:53:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:47,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:47,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:47,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:47,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:48,485 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 20:53:48,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016727155] [2022-01-31 20:53:48,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1016727155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:48,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:48,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:53:48,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835495598] [2022-01-31 20:53:48,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:48,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:53:48,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:53:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:53:48,488 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 20:53:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:50,633 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2022-01-31 20:53:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:53:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 20:53:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:50,635 INFO L225 Difference]: With dead ends: 325 [2022-01-31 20:53:50,635 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 20:53:50,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:53:50,637 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 238 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 4918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 4725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:50,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 158 Invalid, 4918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 20:53:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 20:53:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2022-01-31 20:53:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 20:53:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2022-01-31 20:53:50,691 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 62 [2022-01-31 20:53:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:50,691 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2022-01-31 20:53:50,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 20:53:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2022-01-31 20:53:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:53:50,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:50,692 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:50,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:53:50,692 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:50,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1367970744, now seen corresponding path program 25 times [2022-01-31 20:53:50,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:50,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787633123] [2022-01-31 20:53:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:50,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:50,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:50,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:50,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:51,153 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 20:53:51,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787633123] [2022-01-31 20:53:51,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787633123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:51,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:51,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:53:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633333863] [2022-01-31 20:53:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:51,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:53:51,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:53:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:53:51,155 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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 20:53:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:53,323 INFO L93 Difference]: Finished difference Result 337 states and 395 transitions. [2022-01-31 20:53:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:53:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 20:53:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:53,325 INFO L225 Difference]: With dead ends: 337 [2022-01-31 20:53:53,325 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 20:53:53,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:53:53,326 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 252 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5057 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 5057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:53,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 155 Invalid, 5261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 5057 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 20:53:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 20:53:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 195. [2022-01-31 20:53:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 20:53:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2022-01-31 20:53:53,367 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 64 [2022-01-31 20:53:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:53,367 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2022-01-31 20:53:53,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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 20:53:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2022-01-31 20:53:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:53:53,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:53,368 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:53,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:53:53,368 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1348125158, now seen corresponding path program 26 times [2022-01-31 20:53:53,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:53,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137180609] [2022-01-31 20:53:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:53,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:53,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:53,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:53,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:53,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:53,897 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 20:53:53,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:53,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137180609] [2022-01-31 20:53:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137180609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:53,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:53,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:53:53,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500885646] [2022-01-31 20:53:53,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:53,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:53:53,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:53:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:53:53,898 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 20:53:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:56,256 INFO L93 Difference]: Finished difference Result 349 states and 409 transitions. [2022-01-31 20:53:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:53:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 20:53:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:56,258 INFO L225 Difference]: With dead ends: 349 [2022-01-31 20:53:56,258 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 20:53:56,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:53:56,259 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 272 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5333 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 5552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 5333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:56,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 142 Invalid, 5552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 5333 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 20:53:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 20:53:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 202. [2022-01-31 20:53:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 29 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 20:53:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 230 transitions. [2022-01-31 20:53:56,322 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 230 transitions. Word has length 66 [2022-01-31 20:53:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:56,322 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 230 transitions. [2022-01-31 20:53:56,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 20:53:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 230 transitions. [2022-01-31 20:53:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:53:56,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:56,323 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:56,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:53:56,323 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash -176171012, now seen corresponding path program 27 times [2022-01-31 20:53:56,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:56,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049486200] [2022-01-31 20:53:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:56,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:56,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:56,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:56,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:56,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:56,864 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 20:53:56,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049486200] [2022-01-31 20:53:56,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049486200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:56,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:56,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:53:56,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59566273] [2022-01-31 20:53:56,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:56,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:53:56,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:53:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:53:56,866 INFO L87 Difference]: Start difference. First operand 202 states and 230 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 20:53:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:59,463 INFO L93 Difference]: Finished difference Result 361 states and 423 transitions. [2022-01-31 20:53:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 20:53:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 20:53:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:59,465 INFO L225 Difference]: With dead ends: 361 [2022-01-31 20:53:59,465 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 20:53:59,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:53:59,467 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 262 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 5967 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 6181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 5967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:59,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 179 Invalid, 6181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 5967 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 20:53:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 20:53:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2022-01-31 20:53:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 20:53:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 238 transitions. [2022-01-31 20:53:59,524 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 238 transitions. Word has length 68 [2022-01-31 20:53:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:59,525 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 238 transitions. [2022-01-31 20:53:59,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 20:53:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 238 transitions. [2022-01-31 20:53:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 20:53:59,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:59,526 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:59,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:53:59,526 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash 790331742, now seen corresponding path program 28 times [2022-01-31 20:53:59,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329822223] [2022-01-31 20:53:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:59,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:59,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:59,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:59,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:00,125 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 20:54:00,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:00,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329822223] [2022-01-31 20:54:00,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [329822223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:00,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:00,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:54:00,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944788336] [2022-01-31 20:54:00,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:00,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:54:00,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:54:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:54:00,127 INFO L87 Difference]: Start difference. First operand 209 states and 238 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 20:54:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:02,604 INFO L93 Difference]: Finished difference Result 373 states and 437 transitions. [2022-01-31 20:54:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:54:02,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 20:54:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:02,605 INFO L225 Difference]: With dead ends: 373 [2022-01-31 20:54:02,605 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 20:54:02,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:54:02,608 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 336 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5621 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:02,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 76 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5621 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 20:54:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 20:54:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 216. [2022-01-31 20:54:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 31 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 20:54:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 246 transitions. [2022-01-31 20:54:02,677 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 246 transitions. Word has length 70 [2022-01-31 20:54:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:02,677 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 246 transitions. [2022-01-31 20:54:02,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 20:54:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 246 transitions. [2022-01-31 20:54:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:54:02,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:02,678 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:02,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:54:02,678 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1886542400, now seen corresponding path program 29 times [2022-01-31 20:54:02,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:02,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412169297] [2022-01-31 20:54:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:02,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:02,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:02,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:02,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:03,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:03,240 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 20:54:03,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:03,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412169297] [2022-01-31 20:54:03,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [412169297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:03,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:03,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:54:03,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98287478] [2022-01-31 20:54:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:54:03,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:54:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:54:03,242 INFO L87 Difference]: Start difference. First operand 216 states and 246 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 20:54:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:06,130 INFO L93 Difference]: Finished difference Result 385 states and 451 transitions. [2022-01-31 20:54:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:54:06,130 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 20:54:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:06,132 INFO L225 Difference]: With dead ends: 385 [2022-01-31 20:54:06,132 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 20:54:06,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:54:06,134 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 272 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6949 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 7173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 6949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:06,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 203 Invalid, 7173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 6949 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 20:54:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 20:54:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2022-01-31 20:54:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 20:54:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2022-01-31 20:54:06,207 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 72 [2022-01-31 20:54:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:06,207 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2022-01-31 20:54:06,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 20:54:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2022-01-31 20:54:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:54:06,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:06,208 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:06,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:54:06,208 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1216970078, now seen corresponding path program 30 times [2022-01-31 20:54:06,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:06,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823582489] [2022-01-31 20:54:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:06,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:06,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:06,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:06,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:06,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:06,795 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 20:54:06,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823582489] [2022-01-31 20:54:06,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823582489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:06,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:06,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:54:06,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299707620] [2022-01-31 20:54:06,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:06,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:54:06,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:06,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:54:06,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:54:06,797 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 20:54:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:09,826 INFO L93 Difference]: Finished difference Result 397 states and 465 transitions. [2022-01-31 20:54:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:54:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 20:54:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:09,827 INFO L225 Difference]: With dead ends: 397 [2022-01-31 20:54:09,827 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 20:54:09,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:54:09,829 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 280 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7429 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 7660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 7429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:09,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 210 Invalid, 7660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 7429 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:54:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 20:54:09,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 230. [2022-01-31 20:54:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 33 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 20:54:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 262 transitions. [2022-01-31 20:54:09,899 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 262 transitions. Word has length 74 [2022-01-31 20:54:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:09,900 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 262 transitions. [2022-01-31 20:54:09,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 20:54:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 262 transitions. [2022-01-31 20:54:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 20:54:09,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:09,900 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:09,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:54:09,901 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1309809284, now seen corresponding path program 31 times [2022-01-31 20:54:09,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:09,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961225908] [2022-01-31 20:54:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:09,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:09,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:09,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:09,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:10,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:10,499 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 20:54:10,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961225908] [2022-01-31 20:54:10,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [961225908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:10,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:10,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 20:54:10,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31453822] [2022-01-31 20:54:10,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:10,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 20:54:10,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 20:54:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:54:10,501 INFO L87 Difference]: Start difference. First operand 230 states and 262 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 20:54:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:13,513 INFO L93 Difference]: Finished difference Result 409 states and 479 transitions. [2022-01-31 20:54:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:54:13,514 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 20:54:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:13,515 INFO L225 Difference]: With dead ends: 409 [2022-01-31 20:54:13,515 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 20:54:13,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:54:13,517 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 336 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 7301 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 7571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 7301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:13,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 137 Invalid, 7571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 7301 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:54:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 20:54:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 237. [2022-01-31 20:54:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 34 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 20:54:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 270 transitions. [2022-01-31 20:54:13,593 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 270 transitions. Word has length 76 [2022-01-31 20:54:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:13,593 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 270 transitions. [2022-01-31 20:54:13,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 20:54:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 270 transitions. [2022-01-31 20:54:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 20:54:13,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:13,594 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:13,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:54:13,594 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:13,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1406713370, now seen corresponding path program 32 times [2022-01-31 20:54:13,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:13,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275063595] [2022-01-31 20:54:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:13,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:13,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:13,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:13,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:14,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275063595] [2022-01-31 20:54:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275063595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:14,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:14,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:54:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838504851] [2022-01-31 20:54:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:14,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:54:14,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:54:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:54:14,220 INFO L87 Difference]: Start difference. First operand 237 states and 270 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 20:54:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:17,320 INFO L93 Difference]: Finished difference Result 421 states and 493 transitions. [2022-01-31 20:54:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:54:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 20:54:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:17,322 INFO L225 Difference]: With dead ends: 421 [2022-01-31 20:54:17,322 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 20:54:17,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:54:17,324 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 368 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7477 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 7770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 7477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:17,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 104 Invalid, 7770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 7477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:54:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 20:54:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2022-01-31 20:54:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 35 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 20:54:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2022-01-31 20:54:17,408 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 78 [2022-01-31 20:54:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:17,408 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2022-01-31 20:54:17,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 20:54:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2022-01-31 20:54:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 20:54:17,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:17,409 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:17,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:54:17,409 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -644867896, now seen corresponding path program 33 times [2022-01-31 20:54:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657174989] [2022-01-31 20:54:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:17,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:17,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:17,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:17,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:18,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:18,058 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 20:54:18,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:18,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657174989] [2022-01-31 20:54:18,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657174989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:18,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:18,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:54:18,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135475591] [2022-01-31 20:54:18,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:18,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:54:18,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:54:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:54:18,059 INFO L87 Difference]: Start difference. First operand 244 states and 278 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 20:54:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:21,687 INFO L93 Difference]: Finished difference Result 433 states and 507 transitions. [2022-01-31 20:54:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:54:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 20:54:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:21,689 INFO L225 Difference]: With dead ends: 433 [2022-01-31 20:54:21,689 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 20:54:21,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:54:21,690 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 310 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 8883 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 9139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 8883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:21,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 221 Invalid, 9139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 8883 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:54:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 20:54:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2022-01-31 20:54:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 36 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 20:54:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 286 transitions. [2022-01-31 20:54:21,765 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 286 transitions. Word has length 80 [2022-01-31 20:54:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:21,765 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 286 transitions. [2022-01-31 20:54:21,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 20:54:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 286 transitions. [2022-01-31 20:54:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 20:54:21,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:21,766 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:21,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:54:21,766 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1344192298, now seen corresponding path program 34 times [2022-01-31 20:54:21,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:21,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227049814] [2022-01-31 20:54:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:21,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:21,768 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:21,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:21,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:22,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:22,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227049814] [2022-01-31 20:54:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227049814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:22,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:22,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:54:22,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576800744] [2022-01-31 20:54:22,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:22,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:54:22,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:54:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:54:22,470 INFO L87 Difference]: Start difference. First operand 251 states and 286 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 20:54:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:26,241 INFO L93 Difference]: Finished difference Result 445 states and 521 transitions. [2022-01-31 20:54:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:54:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 20:54:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:26,243 INFO L225 Difference]: With dead ends: 445 [2022-01-31 20:54:26,243 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 20:54:26,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:54:26,244 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 327 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 9299 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 9568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 9299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:26,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 213 Invalid, 9568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 9299 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:54:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 20:54:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 258. [2022-01-31 20:54:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 37 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 20:54:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 294 transitions. [2022-01-31 20:54:26,315 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 294 transitions. Word has length 82 [2022-01-31 20:54:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:26,315 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 294 transitions. [2022-01-31 20:54:26,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 20:54:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 294 transitions. [2022-01-31 20:54:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 20:54:26,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:26,316 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:26,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:54:26,316 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1570592012, now seen corresponding path program 35 times [2022-01-31 20:54:26,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:26,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522812074] [2022-01-31 20:54:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:26,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:26,318 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:26,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:26,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:27,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:27,167 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 20:54:27,167 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522812074] [2022-01-31 20:54:27,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [522812074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:27,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:54:27,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389922794] [2022-01-31 20:54:27,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:54:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:54:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:54:27,169 INFO L87 Difference]: Start difference. First operand 258 states and 294 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 20:54:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:31,170 INFO L93 Difference]: Finished difference Result 457 states and 535 transitions. [2022-01-31 20:54:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:54:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 20:54:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:31,172 INFO L225 Difference]: With dead ends: 457 [2022-01-31 20:54:31,172 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 20:54:31,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:54:31,173 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 329 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 9940 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 10212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 9940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:31,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 230 Invalid, 10212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 9940 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:54:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 20:54:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 265. [2022-01-31 20:54:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 38 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 20:54:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2022-01-31 20:54:31,281 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 84 [2022-01-31 20:54:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:31,282 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2022-01-31 20:54:31,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 20:54:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2022-01-31 20:54:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 20:54:31,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:31,283 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:31,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:54:31,283 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash 97385070, now seen corresponding path program 36 times [2022-01-31 20:54:31,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930859392] [2022-01-31 20:54:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:31,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:31,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:31,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:31,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:32,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:32,090 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 20:54:32,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930859392] [2022-01-31 20:54:32,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930859392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:32,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:32,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:54:32,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997986778] [2022-01-31 20:54:32,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:32,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:54:32,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:54:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:54:32,092 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 20:54:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:36,180 INFO L93 Difference]: Finished difference Result 469 states and 549 transitions. [2022-01-31 20:54:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:54:36,180 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 20:54:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:36,184 INFO L225 Difference]: With dead ends: 469 [2022-01-31 20:54:36,184 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 20:54:36,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:54:36,186 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 349 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 10337 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 10624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 10337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:36,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 217 Invalid, 10624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 10337 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 20:54:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 20:54:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 272. [2022-01-31 20:54:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 39 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 20:54:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 310 transitions. [2022-01-31 20:54:36,281 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 310 transitions. Word has length 86 [2022-01-31 20:54:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:36,281 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 310 transitions. [2022-01-31 20:54:36,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 20:54:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 310 transitions. [2022-01-31 20:54:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 20:54:36,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:36,282 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:36,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:54:36,283 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1684721488, now seen corresponding path program 37 times [2022-01-31 20:54:36,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:36,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017841211] [2022-01-31 20:54:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:36,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:36,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:36,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:36,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:37,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:37,186 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 20:54:37,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:37,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017841211] [2022-01-31 20:54:37,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017841211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:37,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:37,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:54:37,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077408379] [2022-01-31 20:54:37,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:37,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:54:37,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:37,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:54:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:54:37,188 INFO L87 Difference]: Start difference. First operand 272 states and 310 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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 20:54:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:41,670 INFO L93 Difference]: Finished difference Result 481 states and 563 transitions. [2022-01-31 20:54:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:54:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-01-31 20:54:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:41,672 INFO L225 Difference]: With dead ends: 481 [2022-01-31 20:54:41,672 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 20:54:41,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:54:41,673 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 324 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11417 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 11689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 11417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:41,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 279 Invalid, 11689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 11417 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 20:54:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 20:54:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2022-01-31 20:54:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 40 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 20:54:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 318 transitions. [2022-01-31 20:54:41,794 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 318 transitions. Word has length 88 [2022-01-31 20:54:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:41,794 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 318 transitions. [2022-01-31 20:54:41,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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 20:54:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 318 transitions. [2022-01-31 20:54:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 20:54:41,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:41,795 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:41,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:54:41,795 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1893338190, now seen corresponding path program 38 times [2022-01-31 20:54:41,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:41,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016641974] [2022-01-31 20:54:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:41,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:41,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:41,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:41,799 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:42,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:42,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:42,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016641974] [2022-01-31 20:54:42,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016641974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:42,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:42,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:54:42,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97509612] [2022-01-31 20:54:42,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:42,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:54:42,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:54:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:54:42,637 INFO L87 Difference]: Start difference. First operand 279 states and 318 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 20:54:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:47,140 INFO L93 Difference]: Finished difference Result 493 states and 577 transitions. [2022-01-31 20:54:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:54:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 20:54:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:47,141 INFO L225 Difference]: With dead ends: 493 [2022-01-31 20:54:47,141 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 20:54:47,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:54:47,144 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 386 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 11201 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 11516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 11201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:47,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 196 Invalid, 11516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 11201 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 20:54:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 20:54:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 286. [2022-01-31 20:54:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 41 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 20:54:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 326 transitions. [2022-01-31 20:54:47,231 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 326 transitions. Word has length 90 [2022-01-31 20:54:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:47,231 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 326 transitions. [2022-01-31 20:54:47,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 20:54:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 326 transitions. [2022-01-31 20:54:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 20:54:47,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:47,232 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:47,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:54:47,232 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash -139884652, now seen corresponding path program 39 times [2022-01-31 20:54:47,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:47,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596832969] [2022-01-31 20:54:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:47,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:47,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:47,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:47,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:48,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:48,208 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 20:54:48,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:48,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596832969] [2022-01-31 20:54:48,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596832969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:48,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:48,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:54:48,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744305471] [2022-01-31 20:54:48,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:48,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:54:48,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:48,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:54:48,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:54:48,210 INFO L87 Difference]: Start difference. First operand 286 states and 326 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 20:54:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:52,941 INFO L93 Difference]: Finished difference Result 505 states and 591 transitions. [2022-01-31 20:54:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:54:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 20:54:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:52,943 INFO L225 Difference]: With dead ends: 505 [2022-01-31 20:54:52,943 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 20:54:52,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:54:52,944 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 412 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 11529 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 11863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 11529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:52,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 173 Invalid, 11863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 11529 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 20:54:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 20:54:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2022-01-31 20:54:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 42 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 20:54:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 334 transitions. [2022-01-31 20:54:53,060 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 334 transitions. Word has length 92 [2022-01-31 20:54:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:53,061 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 334 transitions. [2022-01-31 20:54:53,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 20:54:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 334 transitions. [2022-01-31 20:54:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 20:54:53,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:53,062 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:53,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:54:53,062 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1301785334, now seen corresponding path program 40 times [2022-01-31 20:54:53,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:53,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797292495] [2022-01-31 20:54:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:53,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:53,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:53,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:53,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:54,061 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 20:54:54,061 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797292495] [2022-01-31 20:54:54,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797292495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:54,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:54,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:54:54,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138132427] [2022-01-31 20:54:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:54,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:54:54,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:54:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:54:54,063 INFO L87 Difference]: Start difference. First operand 293 states and 334 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 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 20:54:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:59,212 INFO L93 Difference]: Finished difference Result 517 states and 605 transitions. [2022-01-31 20:54:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:54:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 20:54:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:59,213 INFO L225 Difference]: With dead ends: 517 [2022-01-31 20:54:59,214 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 20:54:59,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 20:54:59,215 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 366 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 13013 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 13318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 13013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:59,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 270 Invalid, 13318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 13013 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 20:54:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 20:54:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 300. [2022-01-31 20:54:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 43 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 20:54:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 342 transitions. [2022-01-31 20:54:59,345 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 342 transitions. Word has length 94 [2022-01-31 20:54:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:59,345 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 342 transitions. [2022-01-31 20:54:59,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 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 20:54:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 342 transitions. [2022-01-31 20:54:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 20:54:59,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:59,346 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:59,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:54:59,346 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -527794728, now seen corresponding path program 41 times [2022-01-31 20:54:59,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:59,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491391498] [2022-01-31 20:54:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:59,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:59,349 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:59,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:59,351 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:00,284 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 20:55:00,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491391498] [2022-01-31 20:55:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491391498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:00,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:00,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:55:00,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474396160] [2022-01-31 20:55:00,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:00,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:55:00,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:55:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:55:00,286 INFO L87 Difference]: Start difference. First operand 300 states and 342 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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 20:55:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:05,610 INFO L93 Difference]: Finished difference Result 529 states and 619 transitions. [2022-01-31 20:55:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:55:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 20:55:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:05,612 INFO L225 Difference]: With dead ends: 529 [2022-01-31 20:55:05,612 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 20:55:05,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:55:05,614 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 380 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 13569 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 13885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 13569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:05,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 267 Invalid, 13885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 13569 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 20:55:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 20:55:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 307. [2022-01-31 20:55:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 44 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 20:55:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 350 transitions. [2022-01-31 20:55:05,740 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 350 transitions. Word has length 96 [2022-01-31 20:55:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:05,740 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 350 transitions. [2022-01-31 20:55:05,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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 20:55:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 350 transitions. [2022-01-31 20:55:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 20:55:05,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:05,741 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:05,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:55:05,741 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2112610246, now seen corresponding path program 42 times [2022-01-31 20:55:05,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:05,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462496631] [2022-01-31 20:55:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:05,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:05,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:05,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:05,746 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:06,792 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 20:55:06,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462496631] [2022-01-31 20:55:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462496631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:06,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:06,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:55:06,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573312856] [2022-01-31 20:55:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:06,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:55:06,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:06,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:55:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:55:06,794 INFO L87 Difference]: Start difference. First operand 307 states and 350 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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 20:55:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:12,167 INFO L93 Difference]: Finished difference Result 541 states and 633 transitions. [2022-01-31 20:55:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:55:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 20:55:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:12,168 INFO L225 Difference]: With dead ends: 541 [2022-01-31 20:55:12,168 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 20:55:12,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:55:12,170 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 430 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 13537 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 13888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 13537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:12,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 204 Invalid, 13888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 13537 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 20:55:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 20:55:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 314. [2022-01-31 20:55:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 45 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-31 20:55:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 358 transitions. [2022-01-31 20:55:12,289 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 358 transitions. Word has length 98 [2022-01-31 20:55:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 358 transitions. [2022-01-31 20:55:12,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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 20:55:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 358 transitions. [2022-01-31 20:55:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 20:55:12,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:12,290 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:12,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:55:12,291 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash -406932964, now seen corresponding path program 43 times [2022-01-31 20:55:12,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:12,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699096837] [2022-01-31 20:55:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:12,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:12,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:12,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:12,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:13,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:13,367 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 20:55:13,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:13,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699096837] [2022-01-31 20:55:13,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699096837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:13,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:13,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:55:13,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417290113] [2022-01-31 20:55:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:13,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:55:13,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:55:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:55:13,368 INFO L87 Difference]: Start difference. First operand 314 states and 358 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 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 20:55:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:18,762 INFO L93 Difference]: Finished difference Result 553 states and 647 transitions. [2022-01-31 20:55:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 20:55:18,762 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 20:55:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:18,764 INFO L225 Difference]: With dead ends: 553 [2022-01-31 20:55:18,764 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 20:55:18,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:55:18,765 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 465 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 13748 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 14124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 13748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:18,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 166 Invalid, 14124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 13748 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 20:55:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 20:55:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 321. [2022-01-31 20:55:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 20:55:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 366 transitions. [2022-01-31 20:55:18,883 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 366 transitions. Word has length 100 [2022-01-31 20:55:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:18,883 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 366 transitions. [2022-01-31 20:55:18,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 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 20:55:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 366 transitions. [2022-01-31 20:55:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:55:18,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:18,884 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:18,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:55:18,884 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1928572034, now seen corresponding path program 44 times [2022-01-31 20:55:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524330623] [2022-01-31 20:55:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:18,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:18,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:18,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:18,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:19,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:19,903 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 20:55:19,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524330623] [2022-01-31 20:55:19,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524330623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:19,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:19,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:55:19,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687550246] [2022-01-31 20:55:19,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:19,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:55:19,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:55:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:55:19,904 INFO L87 Difference]: Start difference. First operand 321 states and 366 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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 20:55:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:25,916 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2022-01-31 20:55:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:55:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 20:55:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:25,918 INFO L225 Difference]: With dead ends: 565 [2022-01-31 20:55:25,918 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 20:55:25,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:55:25,919 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 410 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 15517 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 15858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 15517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:25,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 278 Invalid, 15858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 15517 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-31 20:55:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 20:55:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2022-01-31 20:55:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 47 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 20:55:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 374 transitions. [2022-01-31 20:55:26,082 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 374 transitions. Word has length 102 [2022-01-31 20:55:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:26,082 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 374 transitions. [2022-01-31 20:55:26,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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 20:55:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 374 transitions. [2022-01-31 20:55:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 20:55:26,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:26,083 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:26,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:55:26,083 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash 360129632, now seen corresponding path program 45 times [2022-01-31 20:55:26,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:26,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226574697] [2022-01-31 20:55:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:26,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:26,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:26,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:26,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:27,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:27,138 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 20:55:27,138 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226574697] [2022-01-31 20:55:27,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226574697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:27,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:27,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:55:27,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059486329] [2022-01-31 20:55:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:27,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:55:27,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:55:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:55:27,140 INFO L87 Difference]: Start difference. First operand 328 states and 374 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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 20:55:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:33,226 INFO L93 Difference]: Finished difference Result 577 states and 675 transitions. [2022-01-31 20:55:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 20:55:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 20:55:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:33,228 INFO L225 Difference]: With dead ends: 577 [2022-01-31 20:55:33,228 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 20:55:33,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:55:33,229 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 448 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 15701 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 16069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 15701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:33,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 235 Invalid, 16069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 15701 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-31 20:55:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 20:55:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 335. [2022-01-31 20:55:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 284 states have (on average 1.0105633802816902) internal successors, (287), 284 states have internal predecessors, (287), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 20:55:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 382 transitions. [2022-01-31 20:55:33,349 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 382 transitions. Word has length 104 [2022-01-31 20:55:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:33,349 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 382 transitions. [2022-01-31 20:55:33,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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 20:55:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 382 transitions. [2022-01-31 20:55:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 20:55:33,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:33,349 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:33,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:55:33,350 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:33,350 INFO L85 PathProgramCache]: Analyzing trace with hash 779175106, now seen corresponding path program 46 times [2022-01-31 20:55:33,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:33,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464119751] [2022-01-31 20:55:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:33,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:33,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:33,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:33,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:34,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:34,506 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 20:55:34,506 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:34,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464119751] [2022-01-31 20:55:34,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [464119751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:34,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:34,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:55:34,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969030818] [2022-01-31 20:55:34,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:55:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:55:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:55:34,507 INFO L87 Difference]: Start difference. First operand 335 states and 382 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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 20:55:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:40,662 INFO L93 Difference]: Finished difference Result 589 states and 689 transitions. [2022-01-31 20:55:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:55:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 20:55:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:40,663 INFO L225 Difference]: With dead ends: 589 [2022-01-31 20:55:40,664 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 20:55:40,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:55:40,665 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 495 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 15719 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 16120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 15719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:40,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 177 Invalid, 16120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 15719 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-31 20:55:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 20:55:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2022-01-31 20:55:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 49 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-31 20:55:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 390 transitions. [2022-01-31 20:55:40,782 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 390 transitions. Word has length 106 [2022-01-31 20:55:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:40,783 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 390 transitions. [2022-01-31 20:55:40,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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 20:55:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 390 transitions. [2022-01-31 20:55:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 20:55:40,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:40,788 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:40,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:55:40,788 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash -245050204, now seen corresponding path program 47 times [2022-01-31 20:55:40,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:40,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180058952] [2022-01-31 20:55:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:40,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:40,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:40,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:40,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:41,955 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 20:55:41,956 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180058952] [2022-01-31 20:55:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180058952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:41,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:41,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 20:55:41,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234276245] [2022-01-31 20:55:41,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:41,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 20:55:41,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 20:55:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:55:41,957 INFO L87 Difference]: Start difference. First operand 342 states and 390 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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 20:55:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:48,603 INFO L93 Difference]: Finished difference Result 601 states and 703 transitions. [2022-01-31 20:55:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:55:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 20:55:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:48,604 INFO L225 Difference]: With dead ends: 601 [2022-01-31 20:55:48,604 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 20:55:48,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:55:48,605 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 467 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 17102 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 17486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 17102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:48,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 244 Invalid, 17486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 17102 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 20:55:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 20:55:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 349. [2022-01-31 20:55:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 296 states have (on average 1.010135135135135) internal successors, (299), 296 states have internal predecessors, (299), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 20:55:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 398 transitions. [2022-01-31 20:55:48,735 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 398 transitions. Word has length 108 [2022-01-31 20:55:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 398 transitions. [2022-01-31 20:55:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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 20:55:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 398 transitions. [2022-01-31 20:55:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 20:55:48,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:48,736 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:48,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:55:48,736 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -978062330, now seen corresponding path program 48 times [2022-01-31 20:55:48,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:48,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180053145] [2022-01-31 20:55:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:48,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:48,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:48,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:48,740 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:49,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:49,913 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 20:55:49,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180053145] [2022-01-31 20:55:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180053145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:49,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 20:55:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988923944] [2022-01-31 20:55:49,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:49,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 20:55:49,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 20:55:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:55:49,914 INFO L87 Difference]: Start difference. First operand 349 states and 398 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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 20:55:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:56,707 INFO L93 Difference]: Finished difference Result 613 states and 717 transitions. [2022-01-31 20:55:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 20:55:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 20:55:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:56,709 INFO L225 Difference]: With dead ends: 613 [2022-01-31 20:55:56,709 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 20:55:56,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:55:56,711 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 493 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 17517 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 17920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 17517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:56,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 221 Invalid, 17920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 17517 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-31 20:55:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 20:55:56,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 356. [2022-01-31 20:55:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 51 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-31 20:55:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 406 transitions. [2022-01-31 20:55:56,844 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 406 transitions. Word has length 110 [2022-01-31 20:55:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:56,845 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 406 transitions. [2022-01-31 20:55:56,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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 20:55:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 406 transitions. [2022-01-31 20:55:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 20:55:56,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:56,845 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:56,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:55:56,845 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1028078872, now seen corresponding path program 49 times [2022-01-31 20:55:56,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:56,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295164211] [2022-01-31 20:55:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:56,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:56,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:56,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:56,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:55:58,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295164211] [2022-01-31 20:55:58,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [295164211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:58,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:58,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 20:55:58,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051975813] [2022-01-31 20:55:58,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:58,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 20:55:58,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 20:55:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:55:58,147 INFO L87 Difference]: Start difference. First operand 356 states and 406 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 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 20:56:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:05,688 INFO L93 Difference]: Finished difference Result 625 states and 731 transitions. [2022-01-31 20:56:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:56:05,689 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 20:56:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:05,691 INFO L225 Difference]: With dead ends: 625 [2022-01-31 20:56:05,691 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 20:56:05,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:56:05,692 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 420 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 19817 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 20173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 19817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:05,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 363 Invalid, 20173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 19817 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-31 20:56:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 20:56:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2022-01-31 20:56:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 52 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 20:56:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 414 transitions. [2022-01-31 20:56:05,828 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 414 transitions. Word has length 112 [2022-01-31 20:56:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:05,829 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 414 transitions. [2022-01-31 20:56:05,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 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 20:56:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 414 transitions. [2022-01-31 20:56:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 20:56:05,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:05,830 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:05,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:56:05,830 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1849335478, now seen corresponding path program 50 times [2022-01-31 20:56:05,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:05,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409826005] [2022-01-31 20:56:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:05,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:05,832 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:05,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:05,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:07,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:07,073 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 20:56:07,073 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409826005] [2022-01-31 20:56:07,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409826005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:07,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:07,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 20:56:07,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444491990] [2022-01-31 20:56:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:07,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 20:56:07,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 20:56:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 20:56:07,075 INFO L87 Difference]: Start difference. First operand 363 states and 414 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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 20:56:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:14,611 INFO L93 Difference]: Finished difference Result 637 states and 745 transitions. [2022-01-31 20:56:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:56:14,611 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 20:56:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:14,613 INFO L225 Difference]: With dead ends: 637 [2022-01-31 20:56:14,613 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 20:56:14,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:56:14,615 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 473 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 19751 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 20144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 19751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:14,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 295 Invalid, 20144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 19751 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-31 20:56:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 20:56:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 370. [2022-01-31 20:56:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 53 states have call successors, (53), 3 states have call predecessors, (53), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-31 20:56:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 422 transitions. [2022-01-31 20:56:14,752 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 422 transitions. Word has length 114 [2022-01-31 20:56:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:14,753 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 422 transitions. [2022-01-31 20:56:14,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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 20:56:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 422 transitions. [2022-01-31 20:56:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 20:56:14,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:14,753 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:14,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:56:14,754 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash -802951380, now seen corresponding path program 51 times [2022-01-31 20:56:14,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:14,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224505914] [2022-01-31 20:56:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:14,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:14,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:14,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:14,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:16,069 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 20:56:16,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224505914] [2022-01-31 20:56:16,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [224505914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:16,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:16,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 20:56:16,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223144140] [2022-01-31 20:56:16,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:16,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 20:56:16,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 20:56:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:56:16,071 INFO L87 Difference]: Start difference. First operand 370 states and 422 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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 20:56:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:24,040 INFO L93 Difference]: Finished difference Result 649 states and 759 transitions. [2022-01-31 20:56:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:56:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 20:56:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:24,042 INFO L225 Difference]: With dead ends: 649 [2022-01-31 20:56:24,042 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 20:56:24,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=468, Invalid=10874, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:56:24,043 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 460 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 20969 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 21355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 20969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:24,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 337 Invalid, 21355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 20969 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-01-31 20:56:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 20:56:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 377. [2022-01-31 20:56:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 320 states have (on average 1.009375) internal successors, (323), 320 states have internal predecessors, (323), 54 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 20:56:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 430 transitions. [2022-01-31 20:56:24,223 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 430 transitions. Word has length 116 [2022-01-31 20:56:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:24,223 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 430 transitions. [2022-01-31 20:56:24,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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 20:56:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 430 transitions. [2022-01-31 20:56:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 20:56:24,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:24,224 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:24,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:56:24,224 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -250180466, now seen corresponding path program 52 times [2022-01-31 20:56:24,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:24,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938565898] [2022-01-31 20:56:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:24,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:24,226 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:24,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:24,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:25,570 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 20:56:25,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938565898] [2022-01-31 20:56:25,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [938565898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:25,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:25,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 20:56:25,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948935885] [2022-01-31 20:56:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:25,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 20:56:25,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 20:56:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:56:25,572 INFO L87 Difference]: Start difference. First operand 377 states and 430 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 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 20:56:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:33,896 INFO L93 Difference]: Finished difference Result 661 states and 773 transitions. [2022-01-31 20:56:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:56:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 20:56:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:33,898 INFO L225 Difference]: With dead ends: 661 [2022-01-31 20:56:33,898 INFO L226 Difference]: Without dead ends: 395 [2022-01-31 20:56:33,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:56:33,899 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 459 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 21977 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 22364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 21977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:33,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 359 Invalid, 22364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 21977 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 20:56:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-31 20:56:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 384. [2022-01-31 20:56:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 55 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 20:56:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 438 transitions. [2022-01-31 20:56:34,061 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 438 transitions. Word has length 118 [2022-01-31 20:56:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:34,061 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 438 transitions. [2022-01-31 20:56:34,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 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 20:56:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 438 transitions. [2022-01-31 20:56:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 20:56:34,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:34,062 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:34,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:56:34,062 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1613276816, now seen corresponding path program 53 times [2022-01-31 20:56:34,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422983671] [2022-01-31 20:56:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:34,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:34,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:34,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:34,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:35,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:35,420 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 20:56:35,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422983671] [2022-01-31 20:56:35,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422983671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:35,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:35,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 20:56:35,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219141318] [2022-01-31 20:56:35,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:35,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 20:56:35,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 20:56:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:56:35,422 INFO L87 Difference]: Start difference. First operand 384 states and 438 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 20:56:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:43,961 INFO L93 Difference]: Finished difference Result 673 states and 787 transitions. [2022-01-31 20:56:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:56:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 20:56:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:43,963 INFO L225 Difference]: With dead ends: 673 [2022-01-31 20:56:43,963 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 20:56:43,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=486, Invalid=11724, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:56:43,964 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 479 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 22580 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 22982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 22580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:43,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 346 Invalid, 22982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 22580 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 20:56:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 20:56:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2022-01-31 20:56:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 332 states have (on average 1.0090361445783131) internal successors, (335), 332 states have internal predecessors, (335), 56 states have call successors, (56), 3 states have call predecessors, (56), 2 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 20:56:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 446 transitions. [2022-01-31 20:56:44,121 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 446 transitions. Word has length 120 [2022-01-31 20:56:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:44,128 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 446 transitions. [2022-01-31 20:56:44,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 20:56:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 446 transitions. [2022-01-31 20:56:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 20:56:44,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:44,128 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:44,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:56:44,128 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1583843886, now seen corresponding path program 54 times [2022-01-31 20:56:44,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:44,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988368285] [2022-01-31 20:56:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:44,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:44,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:44,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:44,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:45,546 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 20:56:45,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988368285] [2022-01-31 20:56:45,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988368285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:45,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:45,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 20:56:45,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439453253] [2022-01-31 20:56:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:45,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 20:56:45,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 20:56:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:56:45,547 INFO L87 Difference]: Start difference. First operand 391 states and 446 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 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 20:56:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:54,149 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-01-31 20:56:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:56:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 20:56:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:54,151 INFO L225 Difference]: With dead ends: 685 [2022-01-31 20:56:54,151 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 20:56:54,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=495, Invalid=12161, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:56:54,152 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 532 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 22509 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 22948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 22509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:54,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 278 Invalid, 22948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 22509 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 20:56:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 20:56:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 398. [2022-01-31 20:56:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 57 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-01-31 20:56:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2022-01-31 20:56:54,312 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 122 [2022-01-31 20:56:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:54,313 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2022-01-31 20:56:54,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 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 20:56:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2022-01-31 20:56:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 20:56:54,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:54,313 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:54,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:56:54,313 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash 931398068, now seen corresponding path program 55 times [2022-01-31 20:56:54,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:54,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220068903] [2022-01-31 20:56:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:54,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:54,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:54,319 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:55,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:55,777 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 20:56:55,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220068903] [2022-01-31 20:56:55,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220068903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:55,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:55,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 20:56:55,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148209085] [2022-01-31 20:56:55,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:55,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 20:56:55,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 20:56:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:56:55,779 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 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 20:57:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:04,745 INFO L93 Difference]: Finished difference Result 697 states and 815 transitions. [2022-01-31 20:57:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:57:04,745 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-01-31 20:57:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:04,747 INFO L225 Difference]: With dead ends: 697 [2022-01-31 20:57:04,747 INFO L226 Difference]: Without dead ends: 416 [2022-01-31 20:57:04,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=504, Invalid=12606, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:57:04,749 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 525 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 23684 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 24120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 23684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:04,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 310 Invalid, 24120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 23684 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-01-31 20:57:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-31 20:57:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 405. [2022-01-31 20:57:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 344 states have (on average 1.0087209302325582) internal successors, (347), 344 states have internal predecessors, (347), 58 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 20:57:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 462 transitions. [2022-01-31 20:57:04,929 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 462 transitions. Word has length 124 [2022-01-31 20:57:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:04,930 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 462 transitions. [2022-01-31 20:57:04,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 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 20:57:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 462 transitions. [2022-01-31 20:57:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 20:57:04,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:04,930 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:04,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:57:04,930 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:04,931 INFO L85 PathProgramCache]: Analyzing trace with hash 12328214, now seen corresponding path program 56 times [2022-01-31 20:57:04,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:04,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695464676] [2022-01-31 20:57:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:04,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:04,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:04,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:04,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:57:06,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:06,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695464676] [2022-01-31 20:57:06,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [695464676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:06,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:06,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 20:57:06,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038119720] [2022-01-31 20:57:06,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 20:57:06,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 20:57:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:57:06,482 INFO L87 Difference]: Start difference. First operand 405 states and 462 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 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 20:57:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:15,537 INFO L93 Difference]: Finished difference Result 709 states and 829 transitions. [2022-01-31 20:57:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:57:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 20:57:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:15,547 INFO L225 Difference]: With dead ends: 709 [2022-01-31 20:57:15,547 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 20:57:15,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=513, Invalid=13059, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:57:15,549 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 572 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 23733 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 24202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 23733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:15,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 252 Invalid, 24202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 23733 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 20:57:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 20:57:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2022-01-31 20:57:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 59 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 20:57:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 470 transitions. [2022-01-31 20:57:15,715 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 470 transitions. Word has length 126 [2022-01-31 20:57:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:15,716 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 470 transitions. [2022-01-31 20:57:15,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 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 20:57:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 470 transitions. [2022-01-31 20:57:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 20:57:15,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:15,716 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:57:15,716 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1549461496, now seen corresponding path program 57 times [2022-01-31 20:57:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540176547] [2022-01-31 20:57:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:15,718 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:15,718 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:15,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:15,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:17,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:17,271 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 20:57:17,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540176547] [2022-01-31 20:57:17,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1540176547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:17,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:17,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 20:57:17,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373677357] [2022-01-31 20:57:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 20:57:17,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 20:57:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:57:17,273 INFO L87 Difference]: Start difference. First operand 412 states and 470 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 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 20:57:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:26,801 INFO L93 Difference]: Finished difference Result 721 states and 843 transitions. [2022-01-31 20:57:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:57:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 20:57:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:26,804 INFO L225 Difference]: With dead ends: 721 [2022-01-31 20:57:26,804 INFO L226 Difference]: Without dead ends: 430 [2022-01-31 20:57:26,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=522, Invalid=13520, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:57:26,805 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 562 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 25007 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 25471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 25007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:26,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 289 Invalid, 25471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 25007 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-01-31 20:57:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-31 20:57:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 419. [2022-01-31 20:57:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 356 states have (on average 1.0084269662921348) internal successors, (359), 356 states have internal predecessors, (359), 60 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 20:57:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 478 transitions. [2022-01-31 20:57:26,991 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 478 transitions. Word has length 128 [2022-01-31 20:57:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:26,991 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 478 transitions. [2022-01-31 20:57:26,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 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 20:57:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 478 transitions. [2022-01-31 20:57:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 20:57:26,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:26,992 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:26,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:57:26,993 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1265795674, now seen corresponding path program 58 times [2022-01-31 20:57:26,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682244610] [2022-01-31 20:57:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:26,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:26,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:26,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:26,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:28,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:28,791 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 20:57:28,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682244610] [2022-01-31 20:57:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [682244610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:28,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:28,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 20:57:28,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394692948] [2022-01-31 20:57:28,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:28,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 20:57:28,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 20:57:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:57:28,793 INFO L87 Difference]: Start difference. First operand 419 states and 478 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 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 20:57:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:38,286 INFO L93 Difference]: Finished difference Result 733 states and 857 transitions. [2022-01-31 20:57:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:57:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 20:57:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:38,288 INFO L225 Difference]: With dead ends: 733 [2022-01-31 20:57:38,288 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 20:57:38,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=531, Invalid=13989, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:57:38,289 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 627 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24659 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 25168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 24659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:38,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 201 Invalid, 25168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 24659 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-01-31 20:57:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 20:57:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 426. [2022-01-31 20:57:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 61 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-31 20:57:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 486 transitions. [2022-01-31 20:57:38,466 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 486 transitions. Word has length 130 [2022-01-31 20:57:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:38,466 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 486 transitions. [2022-01-31 20:57:38,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 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 20:57:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 486 transitions. [2022-01-31 20:57:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 20:57:38,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:38,467 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:38,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:57:38,467 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash -754119620, now seen corresponding path program 59 times [2022-01-31 20:57:38,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:38,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300578063] [2022-01-31 20:57:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:38,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:38,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:38,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:38,472 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:40,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:57:40,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300578063] [2022-01-31 20:57:40,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300578063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:40,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:40,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 20:57:40,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575748163] [2022-01-31 20:57:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:40,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 20:57:40,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 20:57:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:57:40,109 INFO L87 Difference]: Start difference. First operand 426 states and 486 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 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 20:57:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:50,433 INFO L93 Difference]: Finished difference Result 745 states and 871 transitions. [2022-01-31 20:57:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 20:57:50,433 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-01-31 20:57:50,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:50,435 INFO L225 Difference]: With dead ends: 745 [2022-01-31 20:57:50,435 INFO L226 Difference]: Without dead ends: 444 [2022-01-31 20:57:50,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=540, Invalid=14466, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:57:50,436 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 548 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 27505 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 27963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 27505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:50,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 353 Invalid, 27963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 27505 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-01-31 20:57:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-31 20:57:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 433. [2022-01-31 20:57:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 368 states have (on average 1.0081521739130435) internal successors, (371), 368 states have internal predecessors, (371), 62 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-01-31 20:57:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 494 transitions. [2022-01-31 20:57:50,638 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 494 transitions. Word has length 132 [2022-01-31 20:57:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:50,638 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 494 transitions. [2022-01-31 20:57:50,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 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 20:57:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 494 transitions. [2022-01-31 20:57:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 20:57:50,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:50,639 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:57:50,639 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash -567499362, now seen corresponding path program 60 times [2022-01-31 20:57:50,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:50,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157098269] [2022-01-31 20:57:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:50,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:50,641 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:50,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:50,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:52,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:52,294 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 20:57:52,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157098269] [2022-01-31 20:57:52,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [157098269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:52,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:52,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 20:57:52,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663855548] [2022-01-31 20:57:52,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:52,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 20:57:52,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 20:57:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:57:52,296 INFO L87 Difference]: Start difference. First operand 433 states and 494 transitions. Second operand has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 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 20:58:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:02,610 INFO L93 Difference]: Finished difference Result 757 states and 885 transitions. [2022-01-31 20:58:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:58:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 20:58:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:02,611 INFO L225 Difference]: With dead ends: 757 [2022-01-31 20:58:02,612 INFO L226 Difference]: Without dead ends: 451 [2022-01-31 20:58:02,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=549, Invalid=14951, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:58:02,613 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 601 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 27433 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 27928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 27433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:02,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 285 Invalid, 27928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 27433 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-01-31 20:58:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-31 20:58:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 440. [2022-01-31 20:58:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 63 states have call successors, (63), 3 states have call predecessors, (63), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-01-31 20:58:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 502 transitions. [2022-01-31 20:58:02,806 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 502 transitions. Word has length 134 [2022-01-31 20:58:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:02,806 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 502 transitions. [2022-01-31 20:58:02,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 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 20:58:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 502 transitions. [2022-01-31 20:58:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 20:58:02,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:02,807 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:58:02,807 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1614057856, now seen corresponding path program 61 times [2022-01-31 20:58:02,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:02,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985271236] [2022-01-31 20:58:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:02,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:02,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:02,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:02,812 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:04,518 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 20:58:04,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985271236] [2022-01-31 20:58:04,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985271236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:04,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:04,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 20:58:04,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602991655] [2022-01-31 20:58:04,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:04,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 20:58:04,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 20:58:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:58:04,521 INFO L87 Difference]: Start difference. First operand 440 states and 502 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 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 20:58:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:15,859 INFO L93 Difference]: Finished difference Result 769 states and 899 transitions. [2022-01-31 20:58:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:58:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 20:58:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:15,861 INFO L225 Difference]: With dead ends: 769 [2022-01-31 20:58:15,861 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 20:58:15,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=558, Invalid=15444, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:58:15,862 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 519 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 30452 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 30894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 30452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:15,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 442 Invalid, 30894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 30452 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-01-31 20:58:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 20:58:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 447. [2022-01-31 20:58:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 380 states have (on average 1.0078947368421052) internal successors, (383), 380 states have internal predecessors, (383), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 20:58:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 510 transitions. [2022-01-31 20:58:16,066 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 510 transitions. Word has length 136 [2022-01-31 20:58:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:16,066 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 510 transitions. [2022-01-31 20:58:16,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 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 20:58:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 510 transitions. [2022-01-31 20:58:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 20:58:16,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:16,067 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:16,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:58:16,068 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1960543970, now seen corresponding path program 62 times [2022-01-31 20:58:16,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:16,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279479912] [2022-01-31 20:58:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:16,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:16,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:16,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:16,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:17,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:17,811 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 20:58:17,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279479912] [2022-01-31 20:58:17,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279479912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:17,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:17,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 20:58:17,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720700959] [2022-01-31 20:58:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:17,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 20:58:17,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 20:58:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:58:17,813 INFO L87 Difference]: Start difference. First operand 447 states and 510 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 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 20:58:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:29,154 INFO L93 Difference]: Finished difference Result 781 states and 913 transitions. [2022-01-31 20:58:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 20:58:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 20:58:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:29,156 INFO L225 Difference]: With dead ends: 781 [2022-01-31 20:58:29,156 INFO L226 Difference]: Without dead ends: 465 [2022-01-31 20:58:29,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=567, Invalid=15945, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:58:29,157 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 569 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 30467 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 30944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 30467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:29,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 379 Invalid, 30944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 30467 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-01-31 20:58:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-31 20:58:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 454. [2022-01-31 20:58:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 65 states have call successors, (65), 3 states have call predecessors, (65), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 20:58:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 518 transitions. [2022-01-31 20:58:29,365 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 518 transitions. Word has length 138 [2022-01-31 20:58:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:29,366 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 518 transitions. [2022-01-31 20:58:29,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 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 20:58:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 518 transitions. [2022-01-31 20:58:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 20:58:29,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:29,367 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:29,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:58:29,367 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1179061956, now seen corresponding path program 63 times [2022-01-31 20:58:29,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:29,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335263322] [2022-01-31 20:58:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:29,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:29,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:29,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:29,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:31,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:31,377 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 20:58:31,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:31,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335263322] [2022-01-31 20:58:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335263322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:31,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:31,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 20:58:31,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520938349] [2022-01-31 20:58:31,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:31,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 20:58:31,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 20:58:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:58:31,379 INFO L87 Difference]: Start difference. First operand 454 states and 518 transitions. Second operand has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 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 20:58:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:42,645 INFO L93 Difference]: Finished difference Result 793 states and 927 transitions. [2022-01-31 20:58:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:58:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 20:58:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:42,647 INFO L225 Difference]: With dead ends: 793 [2022-01-31 20:58:42,647 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 20:58:42,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=576, Invalid=16454, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:58:42,649 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 634 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 30115 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 30637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 30115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:42,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 291 Invalid, 30637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 30115 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-01-31 20:58:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 20:58:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 461. [2022-01-31 20:58:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 392 states have (on average 1.0076530612244898) internal successors, (395), 392 states have internal predecessors, (395), 66 states have call successors, (66), 3 states have call predecessors, (66), 2 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 20:58:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 526 transitions. [2022-01-31 20:58:42,873 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 526 transitions. Word has length 140 [2022-01-31 20:58:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:42,873 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 526 transitions. [2022-01-31 20:58:42,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 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 20:58:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 526 transitions. [2022-01-31 20:58:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 20:58:42,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:42,874 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:42,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:58:42,874 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1794123302, now seen corresponding path program 64 times [2022-01-31 20:58:42,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027439536] [2022-01-31 20:58:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:42,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:42,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:42,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:42,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:58:44,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:44,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027439536] [2022-01-31 20:58:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027439536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:44,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:44,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 20:58:44,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588815348] [2022-01-31 20:58:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:44,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 20:58:44,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 20:58:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:58:44,769 INFO L87 Difference]: Start difference. First operand 461 states and 526 transitions. Second operand has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 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 20:58:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:55,746 INFO L93 Difference]: Finished difference Result 805 states and 941 transitions. [2022-01-31 20:58:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 20:58:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 20:58:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:55,748 INFO L225 Difference]: With dead ends: 805 [2022-01-31 20:58:55,748 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 20:58:55,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=585, Invalid=16971, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:58:55,750 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 729 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29021 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 29608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 29021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:55,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 153 Invalid, 29608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 29021 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-01-31 20:58:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 20:58:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 468. [2022-01-31 20:58:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 398 states have (on average 1.0075376884422111) internal successors, (401), 398 states have internal predecessors, (401), 67 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 20:58:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 534 transitions. [2022-01-31 20:58:55,970 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 534 transitions. Word has length 142 [2022-01-31 20:58:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:55,970 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 534 transitions. [2022-01-31 20:58:55,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 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 20:58:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 534 transitions. [2022-01-31 20:58:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 20:58:55,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:55,971 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:55,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:58:55,971 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash 162589960, now seen corresponding path program 65 times [2022-01-31 20:58:55,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:55,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483804623] [2022-01-31 20:58:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:55,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:55,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:55,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:55,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:57,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:57,870 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 20:58:57,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483804623] [2022-01-31 20:58:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483804623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:57,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 20:58:57,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837387447] [2022-01-31 20:58:57,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 20:58:57,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 20:58:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:58:57,872 INFO L87 Difference]: Start difference. First operand 468 states and 534 transitions. Second operand has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 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 20:59:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:10,183 INFO L93 Difference]: Finished difference Result 817 states and 955 transitions. [2022-01-31 20:59:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:59:10,183 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 20:59:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:10,185 INFO L225 Difference]: With dead ends: 817 [2022-01-31 20:59:10,185 INFO L226 Difference]: Without dead ends: 486 [2022-01-31 20:59:10,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=594, Invalid=17496, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:59:10,186 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 608 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 33141 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 33649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 33141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:10,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 375 Invalid, 33649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 33141 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-01-31 20:59:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-31 20:59:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 475. [2022-01-31 20:59:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 404 states have (on average 1.0074257425742574) internal successors, (407), 404 states have internal predecessors, (407), 68 states have call successors, (68), 3 states have call predecessors, (68), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-01-31 20:59:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 542 transitions. [2022-01-31 20:59:10,414 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 542 transitions. Word has length 144 [2022-01-31 20:59:10,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:10,414 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 542 transitions. [2022-01-31 20:59:10,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 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 20:59:10,414 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 542 transitions. [2022-01-31 20:59:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 20:59:10,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:10,415 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:10,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:59:10,415 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:10,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -77888662, now seen corresponding path program 66 times [2022-01-31 20:59:10,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:10,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791084199] [2022-01-31 20:59:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:10,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:59:10,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:59:10,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:10,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:59:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:12,374 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 20:59:12,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:12,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791084199] [2022-01-31 20:59:12,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791084199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:12,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:12,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 20:59:12,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632449236] [2022-01-31 20:59:12,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:12,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 20:59:12,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 20:59:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 20:59:12,376 INFO L87 Difference]: Start difference. First operand 475 states and 542 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 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 20:59:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:25,346 INFO L93 Difference]: Finished difference Result 829 states and 969 transitions. [2022-01-31 20:59:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 20:59:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 20:59:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:25,348 INFO L225 Difference]: With dead ends: 829 [2022-01-31 20:59:25,348 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 20:59:25,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=603, Invalid=18029, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:59:25,350 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 562 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 35513 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 35992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 35513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:25,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 472 Invalid, 35992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 35513 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-01-31 20:59:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 20:59:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 482. [2022-01-31 20:59:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 410 states have (on average 1.0073170731707317) internal successors, (413), 410 states have internal predecessors, (413), 69 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 20:59:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 550 transitions. [2022-01-31 20:59:25,574 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 550 transitions. Word has length 146 [2022-01-31 20:59:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:25,574 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 550 transitions. [2022-01-31 20:59:25,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 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 20:59:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 550 transitions. [2022-01-31 20:59:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 20:59:25,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:25,575 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:25,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:59:25,575 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 750389580, now seen corresponding path program 67 times [2022-01-31 20:59:25,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:25,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755456419] [2022-01-31 20:59:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:25,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:59:25,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:59:25,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:25,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:59:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:27,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:27,671 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 20:59:27,671 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755456419] [2022-01-31 20:59:27,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [755456419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:27,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:27,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 20:59:27,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643105966] [2022-01-31 20:59:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:27,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 20:59:27,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 20:59:27,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:59:27,676 INFO L87 Difference]: Start difference. First operand 482 states and 550 transitions. Second operand has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 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 20:59:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:40,210 INFO L93 Difference]: Finished difference Result 841 states and 983 transitions. [2022-01-31 20:59:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:59:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-01-31 20:59:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:40,212 INFO L225 Difference]: With dead ends: 841 [2022-01-31 20:59:40,212 INFO L226 Difference]: Without dead ends: 500 [2022-01-31 20:59:40,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=612, Invalid=18570, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:59:40,214 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 696 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 33437 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 34007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 33437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:40,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 269 Invalid, 34007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 33437 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-01-31 20:59:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-31 20:59:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 489. [2022-01-31 20:59:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 416 states have (on average 1.0072115384615385) internal successors, (419), 416 states have internal predecessors, (419), 70 states have call successors, (70), 3 states have call predecessors, (70), 2 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 20:59:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 558 transitions. [2022-01-31 20:59:40,471 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 558 transitions. Word has length 148 [2022-01-31 20:59:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:40,471 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 558 transitions. [2022-01-31 20:59:40,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 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 20:59:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 558 transitions. [2022-01-31 20:59:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 20:59:40,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:40,472 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:40,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 20:59:40,472 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2138136914, now seen corresponding path program 68 times [2022-01-31 20:59:40,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744359762] [2022-01-31 20:59:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:40,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:59:40,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:59:40,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:40,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:59:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:42,527 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 20:59:42,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744359762] [2022-01-31 20:59:42,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744359762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:42,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:42,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 20:59:42,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942788988] [2022-01-31 20:59:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:42,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 20:59:42,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 20:59:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:59:42,529 INFO L87 Difference]: Start difference. First operand 489 states and 558 transitions. Second operand has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 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 20:59:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:55,563 INFO L93 Difference]: Finished difference Result 853 states and 997 transitions. [2022-01-31 20:59:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 20:59:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 20:59:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:55,565 INFO L225 Difference]: With dead ends: 853 [2022-01-31 20:59:55,565 INFO L226 Difference]: Without dead ends: 507 [2022-01-31 20:59:55,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=621, Invalid=19119, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:59:55,566 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 686 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 34941 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 35506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 34941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:55,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 306 Invalid, 35506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 34941 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-01-31 20:59:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-31 20:59:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2022-01-31 20:59:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 422 states have (on average 1.0071090047393365) internal successors, (425), 422 states have internal predecessors, (425), 71 states have call successors, (71), 3 states have call predecessors, (71), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-01-31 20:59:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 566 transitions. [2022-01-31 20:59:55,815 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 566 transitions. Word has length 150 [2022-01-31 20:59:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 566 transitions. [2022-01-31 20:59:55,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 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 20:59:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 566 transitions. [2022-01-31 20:59:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 20:59:55,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:55,816 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:55,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 20:59:55,816 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash 831742864, now seen corresponding path program 69 times [2022-01-31 20:59:55,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323483723] [2022-01-31 20:59:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:55,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:59:55,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:59:55,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:55,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:59:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:57,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:57,896 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 20:59:57,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323483723] [2022-01-31 20:59:57,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [323483723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:57,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:57,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 20:59:57,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463596244] [2022-01-31 20:59:57,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:57,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 20:59:57,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 20:59:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:59:57,898 INFO L87 Difference]: Start difference. First operand 496 states and 566 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 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 21:00:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:12,147 INFO L93 Difference]: Finished difference Result 865 states and 1011 transitions. [2022-01-31 21:00:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 21:00:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 21:00:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:12,153 INFO L225 Difference]: With dead ends: 865 [2022-01-31 21:00:12,153 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 21:00:12,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=630, Invalid=19676, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:00:12,156 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 598 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 38475 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 38983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 38475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:12,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 473 Invalid, 38983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 38475 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-01-31 21:00:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 21:00:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 503. [2022-01-31 21:00:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 72 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-01-31 21:00:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 574 transitions. [2022-01-31 21:00:12,427 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 574 transitions. Word has length 152 [2022-01-31 21:00:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:12,427 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 574 transitions. [2022-01-31 21:00:12,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 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 21:00:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 574 transitions. [2022-01-31 21:00:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 21:00:12,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:12,428 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:12,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:00:12,428 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1267042318, now seen corresponding path program 70 times [2022-01-31 21:00:12,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:12,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897357350] [2022-01-31 21:00:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:12,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:00:12,430 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:00:12,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:12,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:14,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:14,615 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 21:00:14,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:14,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897357350] [2022-01-31 21:00:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897357350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:14,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:14,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:00:14,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395266200] [2022-01-31 21:00:14,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:14,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:00:14,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:00:14,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:00:14,616 INFO L87 Difference]: Start difference. First operand 503 states and 574 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 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 21:00:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:28,532 INFO L93 Difference]: Finished difference Result 877 states and 1025 transitions. [2022-01-31 21:00:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:00:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 21:00:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:28,534 INFO L225 Difference]: With dead ends: 877 [2022-01-31 21:00:28,534 INFO L226 Difference]: Without dead ends: 521 [2022-01-31 21:00:28,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=639, Invalid=20241, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 21:00:28,537 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 738 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 36161 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 36764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 36161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:28,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 260 Invalid, 36764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 36161 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-01-31 21:00:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-31 21:00:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 510. [2022-01-31 21:00:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 434 states have (on average 1.0069124423963134) internal successors, (437), 434 states have internal predecessors, (437), 73 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-01-31 21:00:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 582 transitions. [2022-01-31 21:00:28,804 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 582 transitions. Word has length 154 [2022-01-31 21:00:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:28,804 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 582 transitions. [2022-01-31 21:00:28,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 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 21:00:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 582 transitions. [2022-01-31 21:00:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 21:00:28,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:28,805 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:28,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:00:28,805 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash 435026900, now seen corresponding path program 71 times [2022-01-31 21:00:28,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:28,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770409147] [2022-01-31 21:00:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:28,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:00:28,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:00:28,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:28,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:31,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:31,224 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 21:00:31,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770409147] [2022-01-31 21:00:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [770409147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:31,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:31,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:00:31,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891797654] [2022-01-31 21:00:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:31,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:00:31,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:00:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:00:31,225 INFO L87 Difference]: Start difference. First operand 510 states and 582 transitions. Second operand has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 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 21:00:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:45,116 INFO L93 Difference]: Finished difference Result 889 states and 1039 transitions. [2022-01-31 21:00:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:00:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-01-31 21:00:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:45,118 INFO L225 Difference]: With dead ends: 889 [2022-01-31 21:00:45,118 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 21:00:45,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=648, Invalid=20814, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:00:45,121 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 779 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36382 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 37014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 36382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:45,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 212 Invalid, 37014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 36382 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-01-31 21:00:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 21:00:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 517. [2022-01-31 21:00:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 440 states have (on average 1.0068181818181818) internal successors, (443), 440 states have internal predecessors, (443), 74 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-01-31 21:00:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 590 transitions. [2022-01-31 21:00:45,400 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 590 transitions. Word has length 156 [2022-01-31 21:00:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:45,401 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 590 transitions. [2022-01-31 21:00:45,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 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 21:00:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 590 transitions. [2022-01-31 21:00:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 21:00:45,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:45,402 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:45,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:00:45,402 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash -258994378, now seen corresponding path program 72 times [2022-01-31 21:00:45,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:45,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374385255] [2022-01-31 21:00:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:45,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:00:45,404 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:00:45,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:45,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:47,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:47,687 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 21:00:47,687 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374385255] [2022-01-31 21:00:47,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374385255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:47,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:47,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:00:47,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592726227] [2022-01-31 21:00:47,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:47,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:00:47,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:00:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:00:47,688 INFO L87 Difference]: Start difference. First operand 517 states and 590 transitions. Second operand has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 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 21:01:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:02,836 INFO L93 Difference]: Finished difference Result 901 states and 1053 transitions. [2022-01-31 21:01:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 21:01:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 21:01:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:02,839 INFO L225 Difference]: With dead ends: 901 [2022-01-31 21:01:02,839 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 21:01:02,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=657, Invalid=21395, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 21:01:02,841 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 682 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 40277 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 40846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 40277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:02,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 394 Invalid, 40846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [569 Valid, 40277 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2022-01-31 21:01:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 21:01:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 524. [2022-01-31 21:01:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 75 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-01-31 21:01:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 598 transitions. [2022-01-31 21:01:03,116 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 598 transitions. Word has length 158 [2022-01-31 21:01:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 598 transitions. [2022-01-31 21:01:03,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 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 21:01:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 598 transitions. [2022-01-31 21:01:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 21:01:03,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:03,118 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:03,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:01:03,118 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1493511656, now seen corresponding path program 73 times [2022-01-31 21:01:03,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:03,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543349974] [2022-01-31 21:01:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:03,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:03,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:01:03,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:03,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:01:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:05,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:05,481 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 21:01:05,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:05,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543349974] [2022-01-31 21:01:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543349974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:05,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:05,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:01:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583132163] [2022-01-31 21:01:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:05,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:01:05,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:01:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:01:05,483 INFO L87 Difference]: Start difference. First operand 524 states and 598 transitions. Second operand has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 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 21:01:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:20,863 INFO L93 Difference]: Finished difference Result 913 states and 1067 transitions. [2022-01-31 21:01:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:01:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-01-31 21:01:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:20,865 INFO L225 Difference]: With dead ends: 913 [2022-01-31 21:01:20,865 INFO L226 Difference]: Without dead ends: 542 [2022-01-31 21:01:20,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=666, Invalid=21984, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:01:20,867 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 708 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 40937 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 41525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 40937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:20,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 371 Invalid, 41525 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [588 Valid, 40937 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2022-01-31 21:01:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-31 21:01:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 531. [2022-01-31 21:01:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 452 states have (on average 1.0066371681415929) internal successors, (455), 452 states have internal predecessors, (455), 76 states have call successors, (76), 3 states have call predecessors, (76), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-01-31 21:01:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 606 transitions. [2022-01-31 21:01:21,160 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 606 transitions. Word has length 160 [2022-01-31 21:01:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:21,160 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 606 transitions. [2022-01-31 21:01:21,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 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 21:01:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 606 transitions. [2022-01-31 21:01:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 21:01:21,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:21,161 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:21,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:01:21,161 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1841325178, now seen corresponding path program 74 times [2022-01-31 21:01:21,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:21,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368035733] [2022-01-31 21:01:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:21,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:21,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:01:21,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:21,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:01:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:23,588 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 21:01:23,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:23,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368035733] [2022-01-31 21:01:23,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [368035733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:23,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:23,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 21:01:23,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199476634] [2022-01-31 21:01:23,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:23,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 21:01:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 21:01:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:01:23,590 INFO L87 Difference]: Start difference. First operand 531 states and 606 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 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 21:01:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:39,848 INFO L93 Difference]: Finished difference Result 925 states and 1081 transitions. [2022-01-31 21:01:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:01:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 21:01:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:39,850 INFO L225 Difference]: With dead ends: 925 [2022-01-31 21:01:39,850 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 21:01:39,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 21:01:39,852 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 671 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 43323 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 43888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 43323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:39,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 453 Invalid, 43888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [565 Valid, 43323 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-01-31 21:01:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 21:01:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 538. [2022-01-31 21:01:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 458 states have (on average 1.0065502183406114) internal successors, (461), 458 states have internal predecessors, (461), 77 states have call successors, (77), 3 states have call predecessors, (77), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-01-31 21:01:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 614 transitions. [2022-01-31 21:01:40,144 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 614 transitions. Word has length 162 [2022-01-31 21:01:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:40,144 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 614 transitions. [2022-01-31 21:01:40,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 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 21:01:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 614 transitions. [2022-01-31 21:01:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 21:01:40,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:40,145 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:40,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:01:40,145 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1721047460, now seen corresponding path program 75 times [2022-01-31 21:01:40,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:40,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232290624] [2022-01-31 21:01:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:40,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:40,154 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:01:40,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:40,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:01:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:01:42,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232290624] [2022-01-31 21:01:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [232290624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:42,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:42,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 21:01:42,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57381798] [2022-01-31 21:01:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:42,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 21:01:42,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 21:01:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:01:42,718 INFO L87 Difference]: Start difference. First operand 538 states and 614 transitions. Second operand has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 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 21:01:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:59,320 INFO L93 Difference]: Finished difference Result 937 states and 1095 transitions. [2022-01-31 21:01:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:01:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-01-31 21:01:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:59,322 INFO L225 Difference]: With dead ends: 937 [2022-01-31 21:01:59,323 INFO L226 Difference]: Without dead ends: 556 [2022-01-31 21:01:59,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=684, Invalid=23186, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 21:01:59,325 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 700 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 43929 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 44515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 43929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:59,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 425 Invalid, 44515 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [586 Valid, 43929 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-01-31 21:01:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-31 21:01:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 545. [2022-01-31 21:01:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 464 states have (on average 1.0064655172413792) internal successors, (467), 464 states have internal predecessors, (467), 78 states have call successors, (78), 3 states have call predecessors, (78), 2 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 21:01:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 622 transitions. [2022-01-31 21:01:59,635 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 622 transitions. Word has length 164 [2022-01-31 21:01:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:59,636 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 622 transitions. [2022-01-31 21:01:59,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 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 21:01:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 622 transitions. [2022-01-31 21:01:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 21:01:59,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:59,636 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:59,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:01:59,636 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2072217666, now seen corresponding path program 76 times [2022-01-31 21:01:59,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755632320] [2022-01-31 21:01:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:59,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:59,638 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:01:59,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:59,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:01:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:02,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:02,201 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 21:02:02,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:02,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755632320] [2022-01-31 21:02:02,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755632320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:02,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:02,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:02:02,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675234091] [2022-01-31 21:02:02,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:02,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:02:02,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:02:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:02:02,203 INFO L87 Difference]: Start difference. First operand 545 states and 622 transitions. Second operand has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 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 21:02:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:19,434 INFO L93 Difference]: Finished difference Result 949 states and 1109 transitions. [2022-01-31 21:02:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 21:02:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 21:02:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:19,436 INFO L225 Difference]: With dead ends: 949 [2022-01-31 21:02:19,436 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 21:02:19,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=693, Invalid=23799, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 21:02:19,438 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 681 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 45881 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 46456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 45881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:19,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 477 Invalid, 46456 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [575 Valid, 45881 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-01-31 21:02:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 21:02:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 552. [2022-01-31 21:02:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 470 states have (on average 1.0063829787234042) internal successors, (473), 470 states have internal predecessors, (473), 79 states have call successors, (79), 3 states have call predecessors, (79), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 21:02:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 630 transitions. [2022-01-31 21:02:19,744 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 630 transitions. Word has length 166 [2022-01-31 21:02:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:19,744 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 630 transitions. [2022-01-31 21:02:19,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 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 21:02:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 630 transitions. [2022-01-31 21:02:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 21:02:19,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:19,745 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:02:19,745 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash -244369248, now seen corresponding path program 77 times [2022-01-31 21:02:19,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:19,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322197951] [2022-01-31 21:02:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:19,747 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:19,747 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:02:19,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:19,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:02:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:22,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:22,339 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 21:02:22,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:22,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322197951] [2022-01-31 21:02:22,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [322197951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:22,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:22,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 21:02:22,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359279919] [2022-01-31 21:02:22,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:22,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 21:02:22,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:22,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 21:02:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:02:22,341 INFO L87 Difference]: Start difference. First operand 552 states and 630 transitions. Second operand has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 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 21:02:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:02:40,086 INFO L93 Difference]: Finished difference Result 961 states and 1123 transitions. [2022-01-31 21:02:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:02:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-01-31 21:02:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:02:40,089 INFO L225 Difference]: With dead ends: 961 [2022-01-31 21:02:40,089 INFO L226 Difference]: Without dead ends: 570 [2022-01-31 21:02:40,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=702, Invalid=24420, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 21:02:40,091 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 674 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 47527 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 48099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 47527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:02:40,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 509 Invalid, 48099 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [572 Valid, 47527 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-01-31 21:02:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-31 21:02:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 559. [2022-01-31 21:02:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 476 states have (on average 1.0063025210084033) internal successors, (479), 476 states have internal predecessors, (479), 80 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 21:02:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 638 transitions. [2022-01-31 21:02:40,402 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 638 transitions. Word has length 168 [2022-01-31 21:02:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:02:40,402 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 638 transitions. [2022-01-31 21:02:40,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 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 21:02:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 638 transitions. [2022-01-31 21:02:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 21:02:40,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:02:40,403 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:02:40,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:02:40,404 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:02:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:02:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -323663614, now seen corresponding path program 78 times [2022-01-31 21:02:40,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:02:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447559435] [2022-01-31 21:02:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:02:40,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:02:40,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:02:40,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:02:40,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:02:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:43,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:02:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:02:43,019 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 21:02:43,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:02:43,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447559435] [2022-01-31 21:02:43,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [447559435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:02:43,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:02:43,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:02:43,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430069043] [2022-01-31 21:02:43,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:02:43,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:02:43,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:02:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:02:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:02:43,021 INFO L87 Difference]: Start difference. First operand 559 states and 638 transitions. Second operand has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 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 21:03:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:00,993 INFO L93 Difference]: Finished difference Result 973 states and 1137 transitions. [2022-01-31 21:03:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 21:03:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 21:03:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:00,995 INFO L225 Difference]: With dead ends: 973 [2022-01-31 21:03:00,995 INFO L226 Difference]: Without dead ends: 577 [2022-01-31 21:03:00,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=711, Invalid=25049, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 21:03:00,998 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 682 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 48769 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 49348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 48769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:00,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 516 Invalid, 49348 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [579 Valid, 48769 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-01-31 21:03:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-31 21:03:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 566. [2022-01-31 21:03:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 482 states have (on average 1.0062240663900415) internal successors, (485), 482 states have internal predecessors, (485), 81 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 21:03:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 646 transitions. [2022-01-31 21:03:01,325 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 646 transitions. Word has length 170 [2022-01-31 21:03:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:01,325 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 646 transitions. [2022-01-31 21:03:01,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 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 21:03:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 646 transitions. [2022-01-31 21:03:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 21:03:01,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:01,326 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:03:01,326 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash 783861988, now seen corresponding path program 79 times [2022-01-31 21:03:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30665108] [2022-01-31 21:03:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:01,328 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:01,328 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:03:01,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:01,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:03:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:04,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:04,017 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 21:03:04,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30665108] [2022-01-31 21:03:04,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30665108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:04,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:04,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:03:04,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820181363] [2022-01-31 21:03:04,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:04,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:03:04,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:04,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:03:04,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:03:04,018 INFO L87 Difference]: Start difference. First operand 566 states and 646 transitions. Second operand has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 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 21:03:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:21,095 INFO L93 Difference]: Finished difference Result 985 states and 1151 transitions. [2022-01-31 21:03:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 21:03:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 21:03:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:21,097 INFO L225 Difference]: With dead ends: 985 [2022-01-31 21:03:21,097 INFO L226 Difference]: Without dead ends: 584 [2022-01-31 21:03:21,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=720, Invalid=25686, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 21:03:21,099 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 840 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45677 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 46363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 45677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:21,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 273 Invalid, 46363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [686 Valid, 45677 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-01-31 21:03:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-31 21:03:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 573. [2022-01-31 21:03:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 488 states have (on average 1.0061475409836065) internal successors, (491), 488 states have internal predecessors, (491), 82 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 21:03:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 654 transitions. [2022-01-31 21:03:21,434 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 654 transitions. Word has length 172 [2022-01-31 21:03:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:21,434 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 654 transitions. [2022-01-31 21:03:21,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 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 21:03:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 654 transitions. [2022-01-31 21:03:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 21:03:21,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:21,435 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:21,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:03:21,435 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash -35923898, now seen corresponding path program 80 times [2022-01-31 21:03:21,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:21,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802004960] [2022-01-31 21:03:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:21,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:21,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:03:21,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:21,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:03:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:24,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:24,225 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 21:03:24,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:24,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802004960] [2022-01-31 21:03:24,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802004960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:24,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:24,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 21:03:24,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681069171] [2022-01-31 21:03:24,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:24,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 21:03:24,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 21:03:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:03:24,227 INFO L87 Difference]: Start difference. First operand 573 states and 654 transitions. Second operand has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 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 21:03:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:41,500 INFO L93 Difference]: Finished difference Result 997 states and 1165 transitions. [2022-01-31 21:03:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:03:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 21:03:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:41,503 INFO L225 Difference]: With dead ends: 997 [2022-01-31 21:03:41,503 INFO L226 Difference]: Without dead ends: 591 [2022-01-31 21:03:41,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=729, Invalid=26331, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 21:03:41,505 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 887 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 45757 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 46476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 45757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:41,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 215 Invalid, 46476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [719 Valid, 45757 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-01-31 21:03:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-31 21:03:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2022-01-31 21:03:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 494 states have (on average 1.0060728744939271) internal successors, (497), 494 states have internal predecessors, (497), 83 states have call successors, (83), 3 states have call predecessors, (83), 2 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 21:03:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 662 transitions. [2022-01-31 21:03:41,884 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 662 transitions. Word has length 174 [2022-01-31 21:03:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 662 transitions. [2022-01-31 21:03:41,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 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 21:03:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 662 transitions. [2022-01-31 21:03:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 21:03:41,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:41,885 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:41,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:03:41,885 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:41,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1871145176, now seen corresponding path program 81 times [2022-01-31 21:03:41,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:41,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313203487] [2022-01-31 21:03:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:41,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:03:41,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:03:41,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:41,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:03:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:44,694 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 21:03:44,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:44,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313203487] [2022-01-31 21:03:44,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313203487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:44,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:44,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:03:44,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467414813] [2022-01-31 21:03:44,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:03:44,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:03:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:03:44,696 INFO L87 Difference]: Start difference. First operand 580 states and 662 transitions. Second operand has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 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 21:04:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:02,740 INFO L93 Difference]: Finished difference Result 1009 states and 1179 transitions. [2022-01-31 21:04:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 21:04:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-01-31 21:04:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:02,742 INFO L225 Difference]: With dead ends: 1009 [2022-01-31 21:04:02,742 INFO L226 Difference]: Without dead ends: 598 [2022-01-31 21:04:02,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=738, Invalid=26984, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 21:04:02,745 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 856 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 48141 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 48841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 48141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:02,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 287 Invalid, 48841 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [700 Valid, 48141 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2022-01-31 21:04:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-31 21:04:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 587. [2022-01-31 21:04:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 500 states have (on average 1.006) internal successors, (503), 500 states have internal predecessors, (503), 84 states have call successors, (84), 3 states have call predecessors, (84), 2 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 21:04:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 670 transitions. [2022-01-31 21:04:03,093 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 670 transitions. Word has length 176 [2022-01-31 21:04:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:03,093 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 670 transitions. [2022-01-31 21:04:03,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 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 21:04:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 670 transitions. [2022-01-31 21:04:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 21:04:03,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:03,094 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:03,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:04:03,094 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash -287234678, now seen corresponding path program 82 times [2022-01-31 21:04:03,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:03,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250185419] [2022-01-31 21:04:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:03,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:03,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:04:03,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:03,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:04:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:05,952 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 21:04:05,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:05,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250185419] [2022-01-31 21:04:05,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250185419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:05,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:05,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:04:05,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589364910] [2022-01-31 21:04:05,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:05,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:04:05,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:05,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:04:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:04:05,954 INFO L87 Difference]: Start difference. First operand 587 states and 670 transitions. Second operand has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 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 21:04:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:24,656 INFO L93 Difference]: Finished difference Result 1021 states and 1193 transitions. [2022-01-31 21:04:24,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 21:04:24,656 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-01-31 21:04:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:24,658 INFO L225 Difference]: With dead ends: 1021 [2022-01-31 21:04:24,658 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 21:04:24,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=747, Invalid=27645, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 21:04:24,660 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 837 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 50207 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 50896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 50207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:24,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 339 Invalid, 50896 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [689 Valid, 50207 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-01-31 21:04:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 21:04:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 594. [2022-01-31 21:04:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 506 states have (on average 1.0059288537549407) internal successors, (509), 506 states have internal predecessors, (509), 85 states have call successors, (85), 3 states have call predecessors, (85), 2 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-01-31 21:04:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 678 transitions. [2022-01-31 21:04:25,021 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 678 transitions. Word has length 178 [2022-01-31 21:04:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:25,021 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 678 transitions. [2022-01-31 21:04:25,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 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 21:04:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 678 transitions. [2022-01-31 21:04:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 21:04:25,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:25,022 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:25,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:04:25,022 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1432331116, now seen corresponding path program 83 times [2022-01-31 21:04:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238599836] [2022-01-31 21:04:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:25,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:04:25,024 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:04:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:25,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:04:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:27,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:27,945 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 21:04:27,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238599836] [2022-01-31 21:04:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238599836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:27,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:27,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 21:04:27,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108511532] [2022-01-31 21:04:27,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:27,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 21:04:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 21:04:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:04:27,946 INFO L87 Difference]: Start difference. First operand 594 states and 678 transitions. Second operand has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 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)