/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:28:31,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:28:31,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:28:31,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 04:28:31,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 04:28:31,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 04:28:31,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 04:28:31,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 04:28:31,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 04:28:31,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 04:28:31,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 04:28:31,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 04:28:31,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:28:31,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:28:31,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:28:31,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:28:31,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:28:31,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:28:31,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:28:31,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:28:31,312 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:28:31,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:28:31,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:28:31,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:28:31,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:28:31,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 04:28:31,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 04:28:31,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 04:28:31,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 04:28:31,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 04:28:31,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 04:28:31,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 04:28:31,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 04:28:31,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 04:28:31,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 04:28:31,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 04:28:31,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 04:28:31,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 04:28:31,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 04:28:31,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:28:31,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:28:31,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:28:31,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:28:31,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:28:31,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:28:31,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:28:31,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:28:31,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:28:31,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:28:31,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:28:31,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:28:31,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:28:31,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:28:31,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:28:31,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:28:31,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:28:31,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:28:31,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:28:31,343 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:28:31,343 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:28:31,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:28:31,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:28:31,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:28:31,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:28:31,514 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:28:31,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-20 04:28:31,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30aeb114/cb9db842989843b79b0035d02fd12108/FLAGc88bf55ec [2022-03-20 04:28:31,918 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:28:31,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-20 04:28:31,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30aeb114/cb9db842989843b79b0035d02fd12108/FLAGc88bf55ec [2022-03-20 04:28:32,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30aeb114/cb9db842989843b79b0035d02fd12108 [2022-03-20 04:28:32,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:28:32,356 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:28:32,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:28:32,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:28:32,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:28:32,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fcdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32, skipping insertion in model container [2022-03-20 04:28:32,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:28:32,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:28:32,485 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-simple/nested_5.c[899,912] [2022-03-20 04:28:32,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:28:32,502 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:28:32,515 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-simple/nested_5.c[899,912] [2022-03-20 04:28:32,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:28:32,524 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:28:32,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32 WrapperNode [2022-03-20 04:28:32,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:28:32,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:28:32,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:28:32,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:28:32,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:28:32,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:28:32,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:28:32,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:28:32,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:28:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:32,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 04:28:32,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 04:28:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:28:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:28:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:28:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:28:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:28:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:28:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:28:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:28:32,684 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:28:32,685 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:28:32,762 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:28:32,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:28:32,767 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 04:28:32,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:28:32 BoogieIcfgContainer [2022-03-20 04:28:32,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:28:32,769 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:28:32,769 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:28:32,769 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:28:32,771 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:28:32" (1/1) ... [2022-03-20 04:28:32,773 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:28:32,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:28:32 BasicIcfg [2022-03-20 04:28:32,783 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:28:32,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:28:32,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:28:32,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:28:32,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:28:32" (1/4) ... [2022-03-20 04:28:32,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12535b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:28:32, skipping insertion in model container [2022-03-20 04:28:32,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:28:32" (2/4) ... [2022-03-20 04:28:32,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12535b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:28:32, skipping insertion in model container [2022-03-20 04:28:32,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:28:32" (3/4) ... [2022-03-20 04:28:32,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12535b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:28:32, skipping insertion in model container [2022-03-20 04:28:32,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:28:32" (4/4) ... [2022-03-20 04:28:32,804 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.cJordan [2022-03-20 04:28:32,807 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:28:32,808 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:28:32,852 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:28:32,856 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 04:28:32,856 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:28:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 04:28:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 04:28:32,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:32,876 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:32,876 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2087165565, now seen corresponding path program 1 times [2022-03-20 04:28:32,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:32,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025134874] [2022-03-20 04:28:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:32,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:32,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:32,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025134874] [2022-03-20 04:28:32,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025134874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:28:32,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:28:32,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:28:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799002873] [2022-03-20 04:28:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:28:32,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:28:32,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:28:33,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:28:33,011 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,031 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-03-20 04:28:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:28:33,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-20 04:28:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,045 INFO L225 Difference]: With dead ends: 24 [2022-03-20 04:28:33,045 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 04:28:33,048 INFO L912 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 [2022-03-20 04:28:33,055 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 04:28:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 04:28:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-03-20 04:28:33,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-03-20 04:28:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,080 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-03-20 04:28:33,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-03-20 04:28:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-20 04:28:33,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,082 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:28:33,083 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2087166526, now seen corresponding path program 1 times [2022-03-20 04:28:33,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:33,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478744116] [2022-03-20 04:28:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478744116] [2022-03-20 04:28:33,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478744116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:28:33,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:28:33,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:28:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433040701] [2022-03-20 04:28:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:28:33,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:28:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:28:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:28:33,161 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,209 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-03-20 04:28:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:28:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-20 04:28:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,210 INFO L225 Difference]: With dead ends: 29 [2022-03-20 04:28:33,210 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 04:28:33,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:28:33,211 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 04:28:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-03-20 04:28:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 04:28:33,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-03-20 04:28:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,214 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 04:28:33,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 04:28:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 04:28:33,215 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,215 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:28:33,215 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 568010400, now seen corresponding path program 1 times [2022-03-20 04:28:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863658868] [2022-03-20 04:28:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863658868] [2022-03-20 04:28:33,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863658868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:28:33,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:28:33,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:28:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744242371] [2022-03-20 04:28:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:28:33,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:28:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:28:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:28:33,278 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,318 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2022-03-20 04:28:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:28:33,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 04:28:33,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,319 INFO L225 Difference]: With dead ends: 28 [2022-03-20 04:28:33,319 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 04:28:33,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:28:33,321 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 04:28:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-03-20 04:28:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 04:28:33,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-03-20 04:28:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,325 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 04:28:33,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 04:28:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 04:28:33,326 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,326 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 04:28:33,326 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash -918082799, now seen corresponding path program 1 times [2022-03-20 04:28:33,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:33,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465623160] [2022-03-20 04:28:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465623160] [2022-03-20 04:28:33,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465623160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:28:33,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:28:33,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:28:33,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910561905] [2022-03-20 04:28:33,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:28:33,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:28:33,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:28:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:28:33,382 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,426 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-20 04:28:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:28:33,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 04:28:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,429 INFO L225 Difference]: With dead ends: 27 [2022-03-20 04:28:33,429 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 04:28:33,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:28:33,435 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 04:28:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-20 04:28:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-20 04:28:33,438 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-03-20 04:28:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,438 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-20 04:28:33,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-20 04:28:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 04:28:33,439 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,439 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 04:28:33,439 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1067555700, now seen corresponding path program 1 times [2022-03-20 04:28:33,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:33,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732996765] [2022-03-20 04:28:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:33,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732996765] [2022-03-20 04:28:33,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732996765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:28:33,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:28:33,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:28:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258122798] [2022-03-20 04:28:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:28:33,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:28:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:28:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:28:33,496 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,522 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-03-20 04:28:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:28:33,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 04:28:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,526 INFO L225 Difference]: With dead ends: 26 [2022-03-20 04:28:33,526 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 04:28:33,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:28:33,527 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 04:28:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-03-20 04:28:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-20 04:28:33,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2022-03-20 04:28:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,530 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-20 04:28:33,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-20 04:28:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 04:28:33,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,531 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 04:28:33,531 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash -495476152, now seen corresponding path program 1 times [2022-03-20 04:28:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302666007] [2022-03-20 04:28:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302666007] [2022-03-20 04:28:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302666007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:28:33,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:28:33,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 04:28:33,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499195600] [2022-03-20 04:28:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:28:33,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 04:28:33,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 04:28:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 04:28:33,580 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,622 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-20 04:28:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 04:28:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 04:28:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,623 INFO L225 Difference]: With dead ends: 25 [2022-03-20 04:28:33,623 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 04:28:33,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:28:33,624 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 04:28:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 04:28:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-03-20 04:28:33,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 21 [2022-03-20 04:28:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,627 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-03-20 04:28:33,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-03-20 04:28:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 04:28:33,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,628 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 04:28:33,628 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1040068038, now seen corresponding path program 1 times [2022-03-20 04:28:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:33,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52884769] [2022-03-20 04:28:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52884769] [2022-03-20 04:28:33,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52884769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406959667] [2022-03-20 04:28:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:33,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:33,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:33,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:28:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 04:28:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406959667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:33,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:33,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 04:28:33,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757939091] [2022-03-20 04:28:33,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:33,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 04:28:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 04:28:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 04:28:33,864 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:33,911 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-20 04:28:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 04:28:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 04:28:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:33,912 INFO L225 Difference]: With dead ends: 30 [2022-03-20 04:28:33,912 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 04:28:33,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:28:33,913 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:33,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 04:28:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 04:28:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 04:28:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 04:28:33,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-20 04:28:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:33,916 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 04:28:33,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 04:28:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 04:28:33,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:33,917 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:33,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:34,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:34,134 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash -758389952, now seen corresponding path program 2 times [2022-03-20 04:28:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:34,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263586299] [2022-03-20 04:28:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:34,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 04:28:34,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263586299] [2022-03-20 04:28:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263586299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:34,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854486102] [2022-03-20 04:28:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 04:28:34,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:34,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:34,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:28:34,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 04:28:34,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:34,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 04:28:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:34,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:28:34,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854486102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:34,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:34,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 11 [2022-03-20 04:28:34,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350406693] [2022-03-20 04:28:34,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:34,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 04:28:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 04:28:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:28:34,348 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:34,616 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-03-20 04:28:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 04:28:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 04:28:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:34,617 INFO L225 Difference]: With dead ends: 63 [2022-03-20 04:28:34,617 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 04:28:34,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-20 04:28:34,618 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:34,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 46 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:28:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 04:28:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-03-20 04:28:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-20 04:28:34,622 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2022-03-20 04:28:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:34,622 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-20 04:28:34,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-20 04:28:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 04:28:34,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:34,623 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:34,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-20 04:28:34,837 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash 329949812, now seen corresponding path program 3 times [2022-03-20 04:28:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:34,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771264486] [2022-03-20 04:28:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:34,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-20 04:28:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771264486] [2022-03-20 04:28:34,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771264486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117292688] [2022-03-20 04:28:34,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 04:28:34,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:34,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:34,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:28:34,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 04:28:34,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 04:28:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 04:28:34,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 04:28:35,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117292688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:35,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:35,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-20 04:28:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956153531] [2022-03-20 04:28:35,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:35,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 04:28:35,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 04:28:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 04:28:35,063 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:35,230 INFO L93 Difference]: Finished difference Result 426 states and 470 transitions. [2022-03-20 04:28:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 04:28:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 04:28:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:35,232 INFO L225 Difference]: With dead ends: 426 [2022-03-20 04:28:35,232 INFO L226 Difference]: Without dead ends: 426 [2022-03-20 04:28:35,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-03-20 04:28:35,233 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:35,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 36 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:28:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-20 04:28:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 298. [2022-03-20 04:28:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 294 states have (on average 1.1122448979591837) internal successors, (327), 294 states have internal predecessors, (327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 330 transitions. [2022-03-20 04:28:35,247 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 330 transitions. Word has length 48 [2022-03-20 04:28:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:35,247 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 330 transitions. [2022-03-20 04:28:35,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 330 transitions. [2022-03-20 04:28:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-03-20 04:28:35,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:35,252 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:35,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:35,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:35,471 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1503345398, now seen corresponding path program 4 times [2022-03-20 04:28:35,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537351694] [2022-03-20 04:28:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 4294 proven. 1 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-03-20 04:28:35,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:35,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537351694] [2022-03-20 04:28:35,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537351694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:35,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366495512] [2022-03-20 04:28:35,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 04:28:35,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:35,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:35,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:35,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 04:28:35,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 04:28:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:35,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 04:28:35,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-20 04:28:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-20 04:28:36,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366495512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:36,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:36,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-20 04:28:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876626450] [2022-03-20 04:28:36,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:36,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 04:28:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 04:28:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 04:28:36,510 INFO L87 Difference]: Start difference. First operand 298 states and 330 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:36,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:36,756 INFO L93 Difference]: Finished difference Result 2286 states and 2470 transitions. [2022-03-20 04:28:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 04:28:36,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-03-20 04:28:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:36,762 INFO L225 Difference]: With dead ends: 2286 [2022-03-20 04:28:36,762 INFO L226 Difference]: Without dead ends: 2286 [2022-03-20 04:28:36,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-20 04:28:36,771 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:36,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 36 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:28:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-03-20 04:28:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1534. [2022-03-20 04:28:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1530 states have (on average 1.0816993464052287) internal successors, (1655), 1530 states have internal predecessors, (1655), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1658 transitions. [2022-03-20 04:28:36,831 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1658 transitions. Word has length 297 [2022-03-20 04:28:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:36,832 INFO L478 AbstractCegarLoop]: Abstraction has 1534 states and 1658 transitions. [2022-03-20 04:28:36,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1658 transitions. [2022-03-20 04:28:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1534 [2022-03-20 04:28:36,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:36,866 INFO L499 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:36,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:37,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:37,079 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -651169602, now seen corresponding path program 5 times [2022-03-20 04:28:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095111986] [2022-03-20 04:28:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 88166 proven. 3149 refuted. 0 times theorem prover too weak. 311023 trivial. 0 not checked. [2022-03-20 04:28:37,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095111986] [2022-03-20 04:28:37,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095111986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364623791] [2022-03-20 04:28:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 04:28:37,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:37,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:37,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 04:28:37,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-03-20 04:28:37,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 04:28:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-20 04:28:39,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-20 04:28:41,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364623791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:41,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:41,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 04:28:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667462978] [2022-03-20 04:28:41,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:41,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:28:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:41,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:28:41,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:28:41,084 INFO L87 Difference]: Start difference. First operand 1534 states and 1658 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:41,183 INFO L93 Difference]: Finished difference Result 4510 states and 4858 transitions. [2022-03-20 04:28:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:28:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1533 [2022-03-20 04:28:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:41,194 INFO L225 Difference]: With dead ends: 4510 [2022-03-20 04:28:41,194 INFO L226 Difference]: Without dead ends: 4510 [2022-03-20 04:28:41,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3078 GetRequests, 3064 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 04:28:41,195 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:41,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 48 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:28:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-03-20 04:28:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-03-20 04:28:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4506 states have (on average 1.0774522858411009) internal successors, (4855), 4506 states have internal predecessors, (4855), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 4858 transitions. [2022-03-20 04:28:41,243 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 4858 transitions. Word has length 1533 [2022-03-20 04:28:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:28:41,244 INFO L478 AbstractCegarLoop]: Abstraction has 4510 states and 4858 transitions. [2022-03-20 04:28:41,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 4858 transitions. [2022-03-20 04:28:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4510 [2022-03-20 04:28:41,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:28:41,388 INFO L499 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:28:41,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 04:28:41,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 04:28:41,604 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:28:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:28:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -737065794, now seen corresponding path program 6 times [2022-03-20 04:28:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:28:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150965931] [2022-03-20 04:28:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:28:41,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:28:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:28:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:28:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359703 proven. 113309 refuted. 0 times theorem prover too weak. 2150622 trivial. 0 not checked. [2022-03-20 04:28:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:28:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150965931] [2022-03-20 04:28:45,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150965931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:28:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246734168] [2022-03-20 04:28:45,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 04:28:45,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:28:45,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:28:45,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:28:45,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 04:28:50,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 753 check-sat command(s) [2022-03-20 04:28:50,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 04:28:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 5371 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 04:28:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:28:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-20 04:28:56,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:28:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-20 04:28:59,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246734168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:28:59,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:28:59,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 04:28:59,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320340165] [2022-03-20 04:28:59,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:28:59,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:28:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:28:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:28:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:28:59,687 INFO L87 Difference]: Start difference. First operand 4510 states and 4858 transitions. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:28:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:28:59,891 INFO L93 Difference]: Finished difference Result 13486 states and 14522 transitions. [2022-03-20 04:28:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:28:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 4509 [2022-03-20 04:28:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:28:59,918 INFO L225 Difference]: With dead ends: 13486 [2022-03-20 04:28:59,919 INFO L226 Difference]: Without dead ends: 13486 [2022-03-20 04:28:59,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9030 GetRequests, 9016 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 04:28:59,919 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:28:59,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 43 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:28:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2022-03-20 04:29:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 13486. [2022-03-20 04:29:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13486 states, 13482 states have (on average 1.0769173713098947) internal successors, (14519), 13482 states have internal predecessors, (14519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:29:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13486 states to 13486 states and 14522 transitions. [2022-03-20 04:29:00,101 INFO L78 Accepts]: Start accepts. Automaton has 13486 states and 14522 transitions. Word has length 4509 [2022-03-20 04:29:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:29:00,102 INFO L478 AbstractCegarLoop]: Abstraction has 13486 states and 14522 transitions. [2022-03-20 04:29:00,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:29:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 13486 states and 14522 transitions. [2022-03-20 04:29:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13486 [2022-03-20 04:29:01,169 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:29:01,172 INFO L499 BasicCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:29:01,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 04:29:01,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:29:01,386 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:29:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:29:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1057330878, now seen corresponding path program 7 times [2022-03-20 04:29:01,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:29:01,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342942219] [2022-03-20 04:29:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:29:01,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:29:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:29:47,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:29:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:29:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-20 04:29:48,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:29:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342942219] [2022-03-20 04:29:48,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342942219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:29:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370839888] [2022-03-20 04:29:48,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 04:29:48,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:29:48,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:29:48,830 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:29:48,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 04:29:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:29:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 21820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 04:29:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:30:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-20 04:30:13,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:30:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-20 04:30:36,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370839888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:30:36,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:30:36,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-20 04:30:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490447794] [2022-03-20 04:30:36,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:30:36,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 04:30:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:30:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 04:30:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 04:30:36,642 INFO L87 Difference]: Start difference. First operand 13486 states and 14522 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:30:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:30:36,807 INFO L93 Difference]: Finished difference Result 20224 states and 21778 transitions. [2022-03-20 04:30:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 04:30:36,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13485 [2022-03-20 04:30:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:30:36,857 INFO L225 Difference]: With dead ends: 20224 [2022-03-20 04:30:36,857 INFO L226 Difference]: Without dead ends: 20224 [2022-03-20 04:30:36,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26984 GetRequests, 26969 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 04:30:36,859 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:30:36,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 04:30:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2022-03-20 04:30:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 20224. [2022-03-20 04:30:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20224 states, 20220 states have (on average 1.0769040553907023) internal successors, (21775), 20220 states have internal predecessors, (21775), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:30:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20224 states to 20224 states and 21778 transitions. [2022-03-20 04:30:37,082 INFO L78 Accepts]: Start accepts. Automaton has 20224 states and 21778 transitions. Word has length 13485 [2022-03-20 04:30:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:30:37,094 INFO L478 AbstractCegarLoop]: Abstraction has 20224 states and 21778 transitions. [2022-03-20 04:30:37,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 04:30:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 20224 states and 21778 transitions. [2022-03-20 04:30:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20224 [2022-03-20 04:30:39,566 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:30:39,570 INFO L499 BasicCegarLoop]: trace histogram [7776, 7776, 1296, 1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:30:39,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 04:30:39,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:30:39,789 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:30:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:30:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash 587167998, now seen corresponding path program 8 times [2022-03-20 04:30:39,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:30:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984714325] [2022-03-20 04:30:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:30:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:31:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat