/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/array-tiling/mbpr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:48:53,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:48:53,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:48:53,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:48:53,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:48:53,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:48:53,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:48:53,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:48:53,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:48:53,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:48:53,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:48:53,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:48:53,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:48:53,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:48:53,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:48:53,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:48:53,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:48:53,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:48:53,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:48:53,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:48:53,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:48:53,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:48:53,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:48:53,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:48:53,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:48:53,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:48:53,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:48:53,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:48:53,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:48:53,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:48:53,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:48:53,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:48:53,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:48:53,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:48:53,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:48:53,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:48:53,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:48:53,160 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:48:53,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:48:53,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:48:53,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:48:53,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:48:53,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:48:53,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:48:53,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:48:53,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:48:53,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:48:53,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:48:53,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:48:53,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:48:53,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:48:53,164 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:48:53,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:48:53,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:48:53,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:48:53,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:48:53,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:48:53,413 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:48:53,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr2.c [2022-01-31 08:48:53,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5547bb981/c18043b5a44c4253922bce5a3d6243d8/FLAGf6e02129f [2022-01-31 08:48:53,852 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:48:53,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c [2022-01-31 08:48:53,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5547bb981/c18043b5a44c4253922bce5a3d6243d8/FLAGf6e02129f [2022-01-31 08:48:54,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5547bb981/c18043b5a44c4253922bce5a3d6243d8 [2022-01-31 08:48:54,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:48:54,276 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:48:54,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:48:54,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:48:54,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:48:54,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e3097d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54, skipping insertion in model container [2022-01-31 08:48:54,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:48:54,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:48:54,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2022-01-31 08:48:54,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:48:54,458 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:48:54,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2022-01-31 08:48:54,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:48:54,487 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:48:54,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54 WrapperNode [2022-01-31 08:48:54,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:48:54,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:48:54,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:48:54,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:48:54,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:48:54,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:48:54,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:48:54,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:48:54,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:48:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:54,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:48:54,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:48:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:48:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:48:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:48:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 08:48:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:48:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:48:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:48:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:48:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:48:54,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:48:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 08:48:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:48:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:48:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:48:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:48:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:48:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:48:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:48:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:48:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:48:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:48:54,666 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:48:54,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:48:54,822 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:48:54,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:48:54,828 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:48:54,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:54 BoogieIcfgContainer [2022-01-31 08:48:54,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:48:54,831 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:48:54,831 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:48:54,832 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:48:54,834 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:54" (1/1) ... [2022-01-31 08:48:54,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:48:54 BasicIcfg [2022-01-31 08:48:54,870 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:48:54,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:48:54,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:48:54,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:48:54,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:48:54" (1/4) ... [2022-01-31 08:48:54,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc6522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:48:54, skipping insertion in model container [2022-01-31 08:48:54,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:54" (2/4) ... [2022-01-31 08:48:54,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc6522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:48:54, skipping insertion in model container [2022-01-31 08:48:54,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:54" (3/4) ... [2022-01-31 08:48:54,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc6522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:48:54, skipping insertion in model container [2022-01-31 08:48:54,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:48:54" (4/4) ... [2022-01-31 08:48:54,876 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr2.cJordan [2022-01-31 08:48:54,880 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:48:54,881 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:48:54,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:48:54,916 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:48:54,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:48:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 08:48:54,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:54,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:54,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 667823142, now seen corresponding path program 1 times [2022-01-31 08:48:54,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:54,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66372532] [2022-01-31 08:48:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:54,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:48:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:48:55,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66372532] [2022-01-31 08:48:55,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66372532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:55,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:48:55,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:48:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382877131] [2022-01-31 08:48:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:55,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:48:55,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:48:55,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:48:55,136 INFO L87 Difference]: Start difference. First operand has 41 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:48:55,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:55,233 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-01-31 08:48:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:48:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 08:48:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:55,247 INFO L225 Difference]: With dead ends: 41 [2022-01-31 08:48:55,247 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:48:55,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:48:55,253 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:55,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:48:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:48:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:48:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-31 08:48:55,290 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-01-31 08:48:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:55,291 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-31 08:48:55,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:48:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-31 08:48:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 08:48:55,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:55,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:55,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:48:55,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1708561347, now seen corresponding path program 1 times [2022-01-31 08:48:55,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:55,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470696882] [2022-01-31 08:48:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:55,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:48:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:48:55,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470696882] [2022-01-31 08:48:55,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470696882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:55,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:48:55,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:48:55,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23733231] [2022-01-31 08:48:55,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:55,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:48:55,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:55,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:48:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:48:55,469 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:48:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:55,615 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-31 08:48:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:48:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-01-31 08:48:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:55,616 INFO L225 Difference]: With dead ends: 41 [2022-01-31 08:48:55,617 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 08:48:55,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:48:55,618 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:55,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 08:48:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-01-31 08:48:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-01-31 08:48:55,624 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2022-01-31 08:48:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:55,625 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-01-31 08:48:55,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:48:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-01-31 08:48:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 08:48:55,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:55,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:55,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:48:55,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1709484868, now seen corresponding path program 1 times [2022-01-31 08:48:55,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:55,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093510410] [2022-01-31 08:48:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:55,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:48:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:48:55,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093510410] [2022-01-31 08:48:55,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093510410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:55,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:48:55,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:48:55,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726720975] [2022-01-31 08:48:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:55,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:48:55,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:48:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:48:55,860 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:48:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:55,964 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-01-31 08:48:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:48:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-01-31 08:48:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:55,969 INFO L225 Difference]: With dead ends: 48 [2022-01-31 08:48:55,970 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 08:48:55,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:48:55,976 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:55,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 32 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 08:48:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-01-31 08:48:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-31 08:48:55,993 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2022-01-31 08:48:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:55,993 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-31 08:48:55,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:48:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-31 08:48:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:48:55,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:55,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:55,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:48:55,996 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash 523441971, now seen corresponding path program 1 times [2022-01-31 08:48:55,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:55,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689684356] [2022-01-31 08:48:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:55,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:48:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:48:56,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689684356] [2022-01-31 08:48:56,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689684356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:56,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:48:56,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:48:56,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779266866] [2022-01-31 08:48:56,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:56,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:48:56,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:48:56,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:48:56,117 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:48:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:56,171 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-01-31 08:48:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:48:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-01-31 08:48:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:56,174 INFO L225 Difference]: With dead ends: 42 [2022-01-31 08:48:56,174 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 08:48:56,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:48:56,177 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:56,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 44 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:48:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 08:48:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-31 08:48:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-31 08:48:56,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2022-01-31 08:48:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:56,181 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-31 08:48:56,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:48:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-31 08:48:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:48:56,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:56,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:56,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:48:56,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1273509388, now seen corresponding path program 1 times [2022-01-31 08:48:56,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:56,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575179379] [2022-01-31 08:48:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:56,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:48:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:48:56,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575179379] [2022-01-31 08:48:56,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575179379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860536636] [2022-01-31 08:48:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:56,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:56,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:56,534 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) [2022-01-31 08:48:56,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:48:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 08:48:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:56,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:48:56,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:48:56,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 08:48:56,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:48:56,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:48:56,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-01-31 08:48:57,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:48:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:48:57,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:57,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-31 08:48:57,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-31 08:48:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:48:57,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860536636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:57,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:57,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-01-31 08:48:57,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956324046] [2022-01-31 08:48:57,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:48:57,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:48:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:48:57,317 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:57,614 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-01-31 08:48:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 08:48:57,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-01-31 08:48:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:57,616 INFO L225 Difference]: With dead ends: 61 [2022-01-31 08:48:57,616 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 08:48:57,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:48:57,617 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 87 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:57,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 109 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:48:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 08:48:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-01-31 08:48:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-01-31 08:48:57,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 32 [2022-01-31 08:48:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:57,624 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-01-31 08:48:57,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:48:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-01-31 08:48:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 08:48:57,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:57,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:57,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:48:57,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:57,836 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1585496059, now seen corresponding path program 1 times [2022-01-31 08:48:57,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459670675] [2022-01-31 08:48:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:57,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:57,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:48:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 08:48:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:48:58,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459670675] [2022-01-31 08:48:58,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459670675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290916242] [2022-01-31 08:48:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:58,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:58,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:58,023 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) [2022-01-31 08:48:58,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:48:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 08:48:58,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:58,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:48:58,152 INFO L353 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-01-31 08:48:58,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 08:49:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:00,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:02,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:49:02,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 08:49:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:02,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290916242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:02,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:02,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 15 [2022-01-31 08:49:02,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728074088] [2022-01-31 08:49:02,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:02,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:49:02,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:49:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=171, Unknown=2, NotChecked=0, Total=210 [2022-01-31 08:49:02,500 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:49:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:02,725 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-01-31 08:49:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:49:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-01-31 08:49:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:02,727 INFO L225 Difference]: With dead ends: 71 [2022-01-31 08:49:02,727 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 08:49:02,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=69, Invalid=309, Unknown=2, NotChecked=0, Total=380 [2022-01-31 08:49:02,728 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:02,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 209 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 285 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-01-31 08:49:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 08:49:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2022-01-31 08:49:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 08:49:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-01-31 08:49:02,733 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 41 [2022-01-31 08:49:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:02,734 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-01-31 08:49:02,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:49:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-01-31 08:49:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 08:49:02,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:02,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:02,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:02,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 08:49:02,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1212731027, now seen corresponding path program 2 times [2022-01-31 08:49:02,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234904494] [2022-01-31 08:49:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:02,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:03,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 08:49:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:49:03,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:03,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234904494] [2022-01-31 08:49:03,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234904494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:03,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147129826] [2022-01-31 08:49:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:49:03,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:03,113 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) [2022-01-31 08:49:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:49:03,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:49:03,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:03,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:49:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:49:03,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:49:03,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147129826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:03,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:03,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 08:49:03,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531579411] [2022-01-31 08:49:03,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:03,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 08:49:03,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 08:49:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:49:03,592 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:49:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:03,847 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2022-01-31 08:49:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:49:03,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-01-31 08:49:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:03,853 INFO L225 Difference]: With dead ends: 105 [2022-01-31 08:49:03,853 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 08:49:03,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-31 08:49:03,854 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:03,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 67 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:49:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 08:49:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-01-31 08:49:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 08:49:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2022-01-31 08:49:03,861 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 45 [2022-01-31 08:49:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:03,861 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2022-01-31 08:49:03,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:49:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2022-01-31 08:49:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 08:49:03,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:03,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:03,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:04,088 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash 701407700, now seen corresponding path program 3 times [2022-01-31 08:49:04,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:04,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311787438] [2022-01-31 08:49:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:04,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:04,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:04,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 08:49:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:04,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:49:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:49:04,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:04,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311787438] [2022-01-31 08:49:04,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311787438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:04,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421532234] [2022-01-31 08:49:04,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:49:04,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:04,342 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) [2022-01-31 08:49:04,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:49:04,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:49:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 08:49:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:49:04,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:49:05,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421532234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:05,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2022-01-31 08:49:05,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046056637] [2022-01-31 08:49:05,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:05,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:49:05,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:49:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:49:05,066 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:05,438 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-01-31 08:49:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 08:49:05,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 50 [2022-01-31 08:49:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:05,439 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:49:05,439 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 08:49:05,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 08:49:05,440 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:05,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 76 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:49:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 08:49:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2022-01-31 08:49:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-31 08:49:05,445 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 50 [2022-01-31 08:49:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:05,445 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-31 08:49:05,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-31 08:49:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 08:49:05,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:05,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:05,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:05,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:05,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1488402613, now seen corresponding path program 4 times [2022-01-31 08:49:05,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384969310] [2022-01-31 08:49:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:05,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 08:49:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:49:05,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384969310] [2022-01-31 08:49:05,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384969310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:05,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74757431] [2022-01-31 08:49:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:49:05,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:05,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:05,851 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) [2022-01-31 08:49:05,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:49:05,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:49:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:49:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:05,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:05,993 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:49:05,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:06,027 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:49:06,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:06,044 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:49:06,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:08,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:08,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:49:08,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 08:49:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:08,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74757431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:08,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:08,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 08:49:08,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275898746] [2022-01-31 08:49:08,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:08,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 08:49:08,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 08:49:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=251, Unknown=2, NotChecked=0, Total=306 [2022-01-31 08:49:08,978 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:49:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:09,190 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-01-31 08:49:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 08:49:09,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-01-31 08:49:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:09,191 INFO L225 Difference]: With dead ends: 74 [2022-01-31 08:49:09,192 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 08:49:09,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=95, Invalid=455, Unknown=2, NotChecked=0, Total=552 [2022-01-31 08:49:09,193 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:09,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 200 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 296 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-01-31 08:49:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 08:49:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2022-01-31 08:49:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 08:49:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-01-31 08:49:09,198 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-01-31 08:49:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:09,198 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-01-31 08:49:09,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:49:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-01-31 08:49:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:49:09,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:09,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:09,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:09,416 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1693330300, now seen corresponding path program 5 times [2022-01-31 08:49:09,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:09,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034184831] [2022-01-31 08:49:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:09,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 08:49:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:49:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:09,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:09,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034184831] [2022-01-31 08:49:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034184831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:09,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039154207] [2022-01-31 08:49:09,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:49:09,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:09,600 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) [2022-01-31 08:49:09,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:49:09,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-31 08:49:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:09,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 08:49:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:09,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:09,798 INFO L353 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-01-31 08:49:09,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 28 [2022-01-31 08:49:09,838 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:49:09,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:09,855 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:49:09,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:11,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:49:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 08:49:12,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:14,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_67 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_67)) (forall ((v_ArrVal_202 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~i~0_67 8) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_202) (+ |c_main_~#volArray~0.offset| 4)) c_main_~MINVAL~0)))) is different from false [2022-01-31 08:49:15,060 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_202 Int) (v_main_~i~0_67 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_67)) (< (select (store (let ((.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|)) (.cse1 (+ (* c_main_~i~0 8) |c_main_~#volArray~0.offset| (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* v_main_~i~0_67 8) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_202) (+ |c_main_~#volArray~0.offset| 4)) c_main_~MINVAL~0))) is different from false [2022-01-31 08:49:15,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-01-31 08:49:15,078 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-31 08:49:15,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 576 treesize of output 540 [2022-01-31 08:49:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 2 not checked. [2022-01-31 08:49:15,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039154207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:15,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:15,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2022-01-31 08:49:15,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638318404] [2022-01-31 08:49:15,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:15,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 08:49:15,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 08:49:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=469, Unknown=4, NotChecked=94, Total=702 [2022-01-31 08:49:15,287 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:49:15,709 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* c_main_~i~0 8) (- 4) |c_main_~#volArray~0.offset|)) 0) (= 2 c_main_~MINVAL~0) (forall ((v_ArrVal_202 Int) (v_main_~i~0_67 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_67)) (< (select (store (let ((.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|)) (.cse1 (+ (* c_main_~i~0 8) |c_main_~#volArray~0.offset| (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* v_main_~i~0_67 8) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_202) (+ |c_main_~#volArray~0.offset| 4)) c_main_~MINVAL~0))) (= c_main_~i~0 1)) is different from false [2022-01-31 08:49:17,712 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* c_main_~i~0 8) (- 4) |c_main_~#volArray~0.offset|)) 0) (= 2 c_main_~MINVAL~0) (forall ((v_main_~i~0_67 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_67)) (forall ((v_ArrVal_202 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~i~0_67 8) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_202) (+ |c_main_~#volArray~0.offset| 4)) c_main_~MINVAL~0)))) (= c_main_~i~0 1)) is different from false [2022-01-31 08:49:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:17,864 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-01-31 08:49:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:49:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 58 [2022-01-31 08:49:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:17,866 INFO L225 Difference]: With dead ends: 68 [2022-01-31 08:49:17,866 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 08:49:17,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=173, Invalid=593, Unknown=6, NotChecked=220, Total=992 [2022-01-31 08:49:17,867 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:17,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 179 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 279 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-31 08:49:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 08:49:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-01-31 08:49:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 08:49:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 08:49:17,871 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 58 [2022-01-31 08:49:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:17,871 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 08:49:17,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 26 states have internal predecessors, (100), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:49:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 08:49:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:49:17,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:17,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:17,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:18,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:18,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2096078371, now seen corresponding path program 6 times [2022-01-31 08:49:18,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:18,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042003431] [2022-01-31 08:49:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:18,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 08:49:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:49:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:18,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:18,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042003431] [2022-01-31 08:49:18,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042003431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838664431] [2022-01-31 08:49:18,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:49:18,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:18,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:18,534 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) [2022-01-31 08:49:18,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:49:18,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-31 08:49:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 08:49:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:18,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:18,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 08:49:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:49:18,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:18,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:49:18,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:49:18,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-01-31 08:49:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:49:19,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:19,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-31 08:49:19,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-01-31 08:49:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:49:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838664431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:20,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:20,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2022-01-31 08:49:20,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716044076] [2022-01-31 08:49:20,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:20,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 08:49:20,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 08:49:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:49:20,084 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 34 states have internal predecessors, (115), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:21,246 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2022-01-31 08:49:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 08:49:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 34 states have internal predecessors, (115), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 58 [2022-01-31 08:49:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:21,248 INFO L225 Difference]: With dead ends: 133 [2022-01-31 08:49:21,248 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 08:49:21,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=534, Invalid=3372, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 08:49:21,250 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 217 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:21,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 261 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 774 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-01-31 08:49:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 08:49:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2022-01-31 08:49:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.075) internal successors, (86), 81 states have internal predecessors, (86), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2022-01-31 08:49:21,262 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 58 [2022-01-31 08:49:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:21,262 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2022-01-31 08:49:21,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 34 states have internal predecessors, (115), 12 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:49:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2022-01-31 08:49:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 08:49:21,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:21,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:21,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:21,488 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1312579260, now seen corresponding path program 7 times [2022-01-31 08:49:21,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344006558] [2022-01-31 08:49:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:21,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:49:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 08:49:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 08:49:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:49:21,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:21,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344006558] [2022-01-31 08:49:21,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344006558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:21,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264227833] [2022-01-31 08:49:21,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:49:21,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:21,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:49:21,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:49:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:49:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 08:49:21,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:49:22,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264227833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:22,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:22,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 08:49:22,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555813513] [2022-01-31 08:49:22,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:22,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:49:22,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:49:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:49:22,280 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:49:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:22,561 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2022-01-31 08:49:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:49:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-01-31 08:49:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:22,563 INFO L225 Difference]: With dead ends: 141 [2022-01-31 08:49:22,563 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 08:49:22,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-01-31 08:49:22,563 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 122 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 70 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:49:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 08:49:22,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-01-31 08:49:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 107 states have internal predecessors, (115), 13 states have call successors, (13), 12 states have call predecessors, (13), 9 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 08:49:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2022-01-31 08:49:22,569 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 71 [2022-01-31 08:49:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:22,569 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2022-01-31 08:49:22,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:49:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2022-01-31 08:49:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 08:49:22,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:22,570 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:22,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:22,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:49:22,783 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -434018237, now seen corresponding path program 8 times [2022-01-31 08:49:22,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:22,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105527052] [2022-01-31 08:49:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:22,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 08:49:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:49:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 08:49:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:49:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:49:23,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:23,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105527052] [2022-01-31 08:49:23,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105527052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:23,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121071488] [2022-01-31 08:49:23,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:49:23,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:23,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:49:23,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:49:23,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:49:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:49:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:49:23,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:49:24,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121071488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:24,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:24,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 35 [2022-01-31 08:49:24,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822134234] [2022-01-31 08:49:24,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:24,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:49:24,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:24,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:49:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:49:24,092 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 34 states have internal predecessors, (128), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:49:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:24,572 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2022-01-31 08:49:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:49:24,572 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 34 states have internal predecessors, (128), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 76 [2022-01-31 08:49:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:24,573 INFO L225 Difference]: With dead ends: 135 [2022-01-31 08:49:24,573 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 08:49:24,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=475, Invalid=1505, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 08:49:24,574 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 363 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:24,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 110 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:49:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 08:49:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2022-01-31 08:49:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 08:49:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 08:49:24,578 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 76 [2022-01-31 08:49:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:24,578 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 08:49:24,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 34 states have internal predecessors, (128), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:49:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 08:49:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 08:49:24,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:24,579 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:24,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 08:49:24,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:49:24,792 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash -92167172, now seen corresponding path program 9 times [2022-01-31 08:49:24,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:24,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024007175] [2022-01-31 08:49:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:24,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:25,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:49:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:25,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:49:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:49:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:25,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 08:49:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:49:25,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024007175] [2022-01-31 08:49:25,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024007175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001658078] [2022-01-31 08:49:25,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:49:25,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:25,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:25,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:49:25,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:49:25,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:49:25,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 08:49:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:25,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:49:25,513 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:49:25,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:25,602 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:49:25,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:25,640 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:49:25,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:49:54,457 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2022-01-31 08:49:54,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 20 [2022-01-31 08:49:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:49:54,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:03,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-01-31 08:50:03,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-01-31 08:50:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:50:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001658078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:03,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:03,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 21] total 50 [2022-01-31 08:50:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477051158] [2022-01-31 08:50:03,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:03,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:50:03,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:03,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:50:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2168, Unknown=9, NotChecked=0, Total=2450 [2022-01-31 08:50:03,784 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 50 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 47 states have internal predecessors, (149), 13 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 08:50:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:11,957 INFO L93 Difference]: Finished difference Result 189 states and 213 transitions. [2022-01-31 08:50:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 08:50:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 47 states have internal predecessors, (149), 13 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 75 [2022-01-31 08:50:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:11,959 INFO L225 Difference]: With dead ends: 189 [2022-01-31 08:50:11,959 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 08:50:11,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 126 SyntacticMatches, 21 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3264 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=1199, Invalid=8101, Unknown=12, NotChecked=0, Total=9312 [2022-01-31 08:50:11,962 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 362 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:11,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 417 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 883 Invalid, 0 Unknown, 358 Unchecked, 0.5s Time] [2022-01-31 08:50:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 08:50:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 133. [2022-01-31 08:50:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 113 states have (on average 1.079646017699115) internal successors, (122), 114 states have internal predecessors, (122), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:50:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-01-31 08:50:11,968 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 75 [2022-01-31 08:50:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:11,968 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-01-31 08:50:11,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 47 states have internal predecessors, (149), 13 states have call successors, (17), 6 states have call predecessors, (17), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 08:50:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-01-31 08:50:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 08:50:11,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:11,970 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:11,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:50:12,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:50:12,184 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1792519923, now seen corresponding path program 10 times [2022-01-31 08:50:12,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680842846] [2022-01-31 08:50:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:12,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:50:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:50:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 08:50:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 08:50:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 08:50:12,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:12,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680842846] [2022-01-31 08:50:12,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680842846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:12,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192341622] [2022-01-31 08:50:12,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:50:12,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:12,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:12,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:50:12,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:50:12,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:50:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:12,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 08:50:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:12,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:12,742 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:50:12,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:12,787 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:50:12,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:50:12,806 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:50:12,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:50:13,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:50:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:50:13,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:15,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_150 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_150)) (forall ((v_ArrVal_449 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_150) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_449) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) is different from false [2022-01-31 08:50:17,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-01-31 08:50:17,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1736 treesize of output 1704 [2022-01-31 08:50:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 2 not checked. [2022-01-31 08:50:18,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192341622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:18,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:18,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 35 [2022-01-31 08:50:18,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039254352] [2022-01-31 08:50:18,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:18,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:50:18,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:50:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=916, Unknown=6, NotChecked=64, Total=1190 [2022-01-31 08:50:18,220 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 35 states, 35 states have (on average 4.0) internal successors, (140), 34 states have internal predecessors, (140), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 08:50:20,373 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 8))) (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|)) 0) (forall ((v_main_~i~0_150 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_150)) (forall ((v_ArrVal_449 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_150) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_449) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) (= |c_main_~#volArray~0.offset| 0) (= 2 c_main_~MINVAL~0) (<= c_main_~i~0 2) (not (<= (+ .cse0 |c_main_~#volArray~0.offset|) 15)))) is different from false [2022-01-31 08:50:22,426 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) 12) 0) (forall ((v_main_~i~0_150 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_150)) (forall ((v_ArrVal_449 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_150) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_449) (+ 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) (= |c_main_~#volArray~0.offset| 0) (= (+ (- 2) c_main_~MINVAL~0) 0)) is different from false [2022-01-31 08:50:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:22,609 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2022-01-31 08:50:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 08:50:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.0) internal successors, (140), 34 states have internal predecessors, (140), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 84 [2022-01-31 08:50:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:22,611 INFO L225 Difference]: With dead ends: 157 [2022-01-31 08:50:22,611 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 08:50:22,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=254, Invalid=1156, Unknown=8, NotChecked=222, Total=1640 [2022-01-31 08:50:22,612 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:22,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 270 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 712 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-01-31 08:50:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 08:50:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2022-01-31 08:50:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.065040650406504) internal successors, (131), 124 states have internal predecessors, (131), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 08:50:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2022-01-31 08:50:22,620 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 84 [2022-01-31 08:50:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:22,620 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2022-01-31 08:50:22,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.0) internal successors, (140), 34 states have internal predecessors, (140), 14 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 08:50:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2022-01-31 08:50:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 08:50:22,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:22,621 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:22,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:50:22,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 08:50:22,836 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1286961298, now seen corresponding path program 11 times [2022-01-31 08:50:22,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898153082] [2022-01-31 08:50:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:22,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:50:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:50:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 08:50:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 08:50:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:50:23,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898153082] [2022-01-31 08:50:23,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898153082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550721604] [2022-01-31 08:50:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:50:23,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:23,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:50:23,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:50:23,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 08:50:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 08:50:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:23,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:23,736 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 08:50:23,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 08:50:23,802 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:50:23,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:50:23,816 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:50:23,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:50:23,859 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:50:23,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:50:23,871 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:50:23,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:50:23,910 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:50:23,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:23,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-01-31 08:50:45,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:50:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:50:45,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:04,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:51:04,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 08:51:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 08:51:04,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550721604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:04,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:04,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 42 [2022-01-31 08:51:04,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640754874] [2022-01-31 08:51:04,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:04,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 08:51:04,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 08:51:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1513, Unknown=9, NotChecked=0, Total=1722 [2022-01-31 08:51:04,194 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand has 42 states, 42 states have (on average 3.8095238095238093) internal successors, (160), 41 states have internal predecessors, (160), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:51:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:07,701 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2022-01-31 08:51:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 08:51:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.8095238095238093) internal successors, (160), 41 states have internal predecessors, (160), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 84 [2022-01-31 08:51:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:07,703 INFO L225 Difference]: With dead ends: 230 [2022-01-31 08:51:07,703 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 08:51:07,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 153 SyntacticMatches, 24 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=464, Invalid=3307, Unknown=11, NotChecked=0, Total=3782 [2022-01-31 08:51:07,705 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 173 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:07,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 425 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1227 Invalid, 0 Unknown, 577 Unchecked, 0.6s Time] [2022-01-31 08:51:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 08:51:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 194. [2022-01-31 08:51:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 162 states have (on average 1.0617283950617284) internal successors, (172), 164 states have internal predecessors, (172), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:51:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 205 transitions. [2022-01-31 08:51:07,712 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 205 transitions. Word has length 84 [2022-01-31 08:51:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:07,712 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 205 transitions. [2022-01-31 08:51:07,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.8095238095238093) internal successors, (160), 41 states have internal predecessors, (160), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 08:51:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 205 transitions. [2022-01-31 08:51:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 08:51:07,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:07,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:07,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:51:07,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 08:51:07,920 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash -125839388, now seen corresponding path program 12 times [2022-01-31 08:51:07,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528958768] [2022-01-31 08:51:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:07,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:08,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:51:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 08:51:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 08:51:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:08,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 08:51:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:51:08,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:08,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528958768] [2022-01-31 08:51:08,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528958768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247786959] [2022-01-31 08:51:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:51:08,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:08,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:51:08,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 08:51:08,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 08:51:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:08,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:51:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 08:51:08,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 08:51:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247786959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:09,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:09,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 08:51:09,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406001173] [2022-01-31 08:51:09,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:51:09,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:51:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:51:09,104 INFO L87 Difference]: Start difference. First operand 194 states and 205 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:51:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:09,991 INFO L93 Difference]: Finished difference Result 253 states and 279 transitions. [2022-01-31 08:51:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 08:51:09,992 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2022-01-31 08:51:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:09,993 INFO L225 Difference]: With dead ends: 253 [2022-01-31 08:51:09,993 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 08:51:09,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:51:09,995 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 312 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:09,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 160 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:51:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 08:51:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 189. [2022-01-31 08:51:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 160 states have (on average 1.06875) internal successors, (171), 162 states have internal predecessors, (171), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:51:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 200 transitions. [2022-01-31 08:51:10,003 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 200 transitions. Word has length 87 [2022-01-31 08:51:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:10,003 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 200 transitions. [2022-01-31 08:51:10,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:51:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 200 transitions. [2022-01-31 08:51:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 08:51:10,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:10,005 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:10,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 08:51:10,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 08:51:10,219 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash -692411619, now seen corresponding path program 13 times [2022-01-31 08:51:10,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:10,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138535875] [2022-01-31 08:51:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:10,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:51:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:51:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:51:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 08:51:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 08:51:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:51:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:51:10,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138535875] [2022-01-31 08:51:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138535875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350903559] [2022-01-31 08:51:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:51:10,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:10,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:10,480 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:51:10,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 08:51:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 08:51:10,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:10,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:51:10,664 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 08:51:10,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 08:51:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-31 08:51:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:55,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:51:55,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 08:51:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 80 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-31 08:51:55,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350903559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:55,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:55,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 25 [2022-01-31 08:51:55,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003144110] [2022-01-31 08:51:55,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:55,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:51:55,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:51:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=523, Unknown=6, NotChecked=0, Total=600 [2022-01-31 08:51:55,250 INFO L87 Difference]: Start difference. First operand 189 states and 200 transitions. Second operand has 25 states, 24 states have (on average 4.333333333333333) internal successors, (104), 22 states have internal predecessors, (104), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 08:51:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:00,000 INFO L93 Difference]: Finished difference Result 230 states and 246 transitions. [2022-01-31 08:52:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 08:52:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.333333333333333) internal successors, (104), 22 states have internal predecessors, (104), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 93 [2022-01-31 08:52:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:00,002 INFO L225 Difference]: With dead ends: 230 [2022-01-31 08:52:00,002 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 08:52:00,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 178 SyntacticMatches, 19 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=152, Invalid=1245, Unknown=9, NotChecked=0, Total=1406 [2022-01-31 08:52:00,003 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:00,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 356 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 869 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-01-31 08:52:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 08:52:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 187. [2022-01-31 08:52:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 160 states have internal predecessors, (169), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:52:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 198 transitions. [2022-01-31 08:52:00,010 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 198 transitions. Word has length 93 [2022-01-31 08:52:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:00,010 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 198 transitions. [2022-01-31 08:52:00,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.333333333333333) internal successors, (104), 22 states have internal predecessors, (104), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 08:52:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 198 transitions. [2022-01-31 08:52:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 08:52:00,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:00,011 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:00,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 08:52:00,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:00,227 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1393650332, now seen corresponding path program 14 times [2022-01-31 08:52:00,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:00,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732227213] [2022-01-31 08:52:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:00,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:00,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:52:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:00,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 08:52:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:00,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:52:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:00,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 08:52:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:52:00,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:00,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732227213] [2022-01-31 08:52:00,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732227213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:00,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797921221] [2022-01-31 08:52:00,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:52:00,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:00,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:00,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:52:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 08:52:00,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:52:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:00,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 08:52:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:00,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:52:00,834 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:52:00,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:52:00,865 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:00,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:00,879 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:00,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:00,909 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:00,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:00,931 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:00,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:00,963 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:00,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:00,977 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:00,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 08:52:01,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:52:09,927 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_232 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_232)) (forall ((v_ArrVal_750 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_232) |c_main_~#volArray~0.offset|) v_ArrVal_750) (+ 12 |c_main_~#volArray~0.offset|)) 0)))) is different from false [2022-01-31 08:52:13,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:52:13,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 08:52:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 61 trivial. 4 not checked. [2022-01-31 08:52:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797921221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:52:13,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:52:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 38 [2022-01-31 08:52:13,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267465581] [2022-01-31 08:52:13,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:52:13,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 08:52:13,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:52:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 08:52:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1129, Unknown=11, NotChecked=70, Total=1406 [2022-01-31 08:52:13,642 INFO L87 Difference]: Start difference. First operand 187 states and 198 transitions. Second operand has 38 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 35 states have internal predecessors, (133), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 08:52:15,855 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 8))) (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|)) 0) (= |c_main_~#volArray~0.offset| 0) (<= c_main_~i~0 2) (forall ((v_main_~i~0_232 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_232)) (forall ((v_ArrVal_750 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_232) |c_main_~#volArray~0.offset|) v_ArrVal_750) (+ 12 |c_main_~#volArray~0.offset|)) 0)))) (< 15 (+ .cse0 |c_main_~#volArray~0.offset|)))) is different from false [2022-01-31 08:52:17,879 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) 12) 0) (= |c_main_~#volArray~0.offset| 0) (<= (+ (div (+ 16 (* (- 1) |c_main_~#volArray~0.offset|)) 8) 1) c_main_~i~0) (forall ((v_main_~i~0_232 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_232)) (forall ((v_ArrVal_750 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_232) |c_main_~#volArray~0.offset|) v_ArrVal_750) (+ 12 |c_main_~#volArray~0.offset|)) 0))))) is different from false [2022-01-31 08:52:19,958 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ 2 (div (+ 16 (* (- 1) |c_main_~#volArray~0.offset|)) 8)) c_main_~i~0) (= (select (select |c_#memory_int| |c_main_~#volArray~0.base|) 12) 0) (= |c_main_~#volArray~0.offset| 0) (forall ((v_main_~i~0_232 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_232)) (forall ((v_ArrVal_750 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_232) |c_main_~#volArray~0.offset|) v_ArrVal_750) (+ 12 |c_main_~#volArray~0.offset|)) 0))))) is different from false [2022-01-31 08:52:22,049 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|))) (and (<= (+ 2 (div (+ 16 (* (- 1) |c_main_~#volArray~0.offset|)) 8)) c_main_~i~0) (= (select .cse0 12) 0) (<= 5 c_main_~i~0) (= |c_main_~#volArray~0.offset| 0) (= (select .cse0 (+ 12 |c_main_~#volArray~0.offset|)) 0) (forall ((v_main_~i~0_232 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_232)) (forall ((v_ArrVal_750 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) (* 8 v_main_~i~0_232) |c_main_~#volArray~0.offset|) v_ArrVal_750) (+ 12 |c_main_~#volArray~0.offset|)) 0)))))) is different from false [2022-01-31 08:52:22,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:22,249 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2022-01-31 08:52:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:52:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 35 states have internal predecessors, (133), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 91 [2022-01-31 08:52:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:22,251 INFO L225 Difference]: With dead ends: 193 [2022-01-31 08:52:22,251 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 08:52:22,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 164 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=323, Invalid=1938, Unknown=15, NotChecked=480, Total=2756 [2022-01-31 08:52:22,252 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:22,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 422 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1019 Invalid, 0 Unknown, 119 Unchecked, 0.4s Time] [2022-01-31 08:52:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 08:52:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2022-01-31 08:52:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 123 states have (on average 1.065040650406504) internal successors, (131), 124 states have internal predecessors, (131), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:52:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-01-31 08:52:22,256 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 91 [2022-01-31 08:52:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-01-31 08:52:22,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 35 states have internal predecessors, (133), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 08:52:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-01-31 08:52:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 08:52:22,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:22,258 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:22,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 08:52:22,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:22,471 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1925522674, now seen corresponding path program 15 times [2022-01-31 08:52:22,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033741975] [2022-01-31 08:52:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:22,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:52:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:52:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:52:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 08:52:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 08:52:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:52:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 08:52:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 08:52:22,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033741975] [2022-01-31 08:52:22,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033741975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162090092] [2022-01-31 08:52:22,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:52:22,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:22,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:22,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:52:22,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 08:52:23,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 08:52:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 08:52:23,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:23,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:52:23,464 INFO L353 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-01-31 08:52:23,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 28 [2022-01-31 08:52:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:52:49,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:52:49,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162090092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:49,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 08:52:49,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 35 [2022-01-31 08:52:49,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540358712] [2022-01-31 08:52:49,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 08:52:49,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:52:49,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:52:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:52:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1351, Unknown=2, NotChecked=0, Total=1640 [2022-01-31 08:52:49,386 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 16 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 08:52:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:53,791 INFO L93 Difference]: Finished difference Result 227 states and 240 transitions. [2022-01-31 08:52:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 08:52:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 16 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 102 [2022-01-31 08:52:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:53,793 INFO L225 Difference]: With dead ends: 227 [2022-01-31 08:52:53,793 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 08:52:53,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=400, Invalid=1948, Unknown=4, NotChecked=0, Total=2352 [2022-01-31 08:52:53,795 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:53,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 177 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 277 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-01-31 08:52:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 08:52:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 217. [2022-01-31 08:52:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 181 states have (on average 1.0552486187845305) internal successors, (191), 182 states have internal predecessors, (191), 19 states have call successors, (19), 19 states have call predecessors, (19), 16 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 08:52:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 228 transitions. [2022-01-31 08:52:53,801 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 228 transitions. Word has length 102 [2022-01-31 08:52:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:53,801 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 228 transitions. [2022-01-31 08:52:53,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 16 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 08:52:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 228 transitions. [2022-01-31 08:52:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 08:52:53,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:53,803 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:53,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 08:52:54,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:54,003 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:54,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1419964049, now seen corresponding path program 16 times [2022-01-31 08:52:54,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:54,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153231352] [2022-01-31 08:52:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:54,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:52:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:52:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:52:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 08:52:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 08:52:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:52:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 08:52:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 08:52:54,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:54,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153231352] [2022-01-31 08:52:54,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153231352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:54,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856704036] [2022-01-31 08:52:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:52:54,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:54,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:54,441 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:52:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 08:52:54,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:52:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:54,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:52:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 08:52:55,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:52:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-31 08:52:55,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856704036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:52:55,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:52:55,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 43 [2022-01-31 08:52:55,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014409343] [2022-01-31 08:52:55,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:52:55,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 08:52:55,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:52:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 08:52:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:52:55,726 INFO L87 Difference]: Start difference. First operand 217 states and 228 transitions. Second operand has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 42 states have internal predecessors, (163), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 08:52:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:56,395 INFO L93 Difference]: Finished difference Result 272 states and 280 transitions. [2022-01-31 08:52:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:52:56,396 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 42 states have internal predecessors, (163), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 102 [2022-01-31 08:52:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:56,397 INFO L225 Difference]: With dead ends: 272 [2022-01-31 08:52:56,397 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 08:52:56,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2207, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 08:52:56,398 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 245 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:56,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 154 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:52:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 08:52:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2022-01-31 08:52:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.0512820512820513) internal successors, (123), 118 states have internal predecessors, (123), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:52:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2022-01-31 08:52:56,402 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 102 [2022-01-31 08:52:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:56,402 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2022-01-31 08:52:56,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 42 states have internal predecessors, (163), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 08:52:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2022-01-31 08:52:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 08:52:56,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:56,403 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:56,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 08:52:56,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:56,616 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:56,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash 781287330, now seen corresponding path program 17 times [2022-01-31 08:52:56,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:56,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659685035] [2022-01-31 08:52:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:56,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:52:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 08:52:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:52:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 08:52:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 08:52:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 08:52:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 08:52:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 18 proven. 143 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:52:57,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659685035] [2022-01-31 08:52:57,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659685035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391376239] [2022-01-31 08:52:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:52:57,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:57,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:57,088 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:52:57,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 08:52:57,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 08:52:57,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 08:52:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:57,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:52:57,573 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:52:57,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:52:57,618 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:52:57,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:52:57,634 INFO L353 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2022-01-31 08:52:57,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 25 [2022-01-31 08:52:58,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:52:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 62 proven. 88 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-31 08:52:58,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:03,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_288 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_288)) (forall ((v_ArrVal_934 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_288) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_934) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) is different from false [2022-01-31 08:53:06,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-01-31 08:53:06,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 416 treesize of output 408 [2022-01-31 08:53:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 44 proven. 85 refuted. 0 times theorem prover too weak. 89 trivial. 3 not checked. [2022-01-31 08:53:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391376239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:06,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:06,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 17] total 49 [2022-01-31 08:53:06,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268821399] [2022-01-31 08:53:06,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:06,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 08:53:06,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 08:53:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2021, Unknown=7, NotChecked=92, Total=2352 [2022-01-31 08:53:06,923 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand has 49 states, 49 states have (on average 3.7551020408163267) internal successors, (184), 48 states have internal predecessors, (184), 21 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-01-31 08:53:15,715 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 8)) (.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|))) (and (= 3 (select .cse0 (+ .cse1 |c_main_~#volArray~0.offset|))) (forall ((v_main_~i~0_288 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_288)) (forall ((v_ArrVal_934 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_288) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_934) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) (<= c_main_~i~0 3) (= c_main_~i~0 3) (<= (select .cse0 (+ .cse1 (- 4) |c_main_~#volArray~0.offset|)) 0) (= 3 c_main_~CCCELVOL2~0) (<= 2 c_main_~MINVAL~0) (= 2 c_main_~MINVAL~0) (<= 3 c_main_~i~0) (= .cse1 24) (< (select .cse0 (+ (* c_main_~i~0 4) |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (= (+ (- 2) c_main_~MINVAL~0) 0))) is different from false [2022-01-31 08:53:17,824 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 4)) (.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|))) (and (forall ((v_main_~i~0_288 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_288)) (forall ((v_ArrVal_934 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* 8 v_main_~i~0_288) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_934) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) (= (select .cse0 (+ (* c_main_~i~0 8) |c_main_~#volArray~0.offset| (- 8))) 3) (<= c_main_~i~0 4) (<= 4 c_main_~i~0) (< (select .cse0 (+ .cse1 |c_main_~#volArray~0.offset| 4)) c_main_~MINVAL~0) (<= 2 c_main_~MINVAL~0) (< (select .cse0 (+ .cse1 12 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (<= (select .cse0 (+ 20 |c_main_~#volArray~0.offset|)) 0) (= (+ (- 2) c_main_~MINVAL~0) 0))) is different from false [2022-01-31 08:53:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:21,302 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2022-01-31 08:53:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 08:53:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.7551020408163267) internal successors, (184), 48 states have internal predecessors, (184), 21 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 110 [2022-01-31 08:53:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:21,304 INFO L225 Difference]: With dead ends: 232 [2022-01-31 08:53:21,304 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 08:53:21,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 209 SyntacticMatches, 22 SemanticMatches, 86 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=661, Invalid=6473, Unknown=18, NotChecked=504, Total=7656 [2022-01-31 08:53:21,307 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 163 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:21,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 479 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1777 Invalid, 0 Unknown, 409 Unchecked, 0.8s Time] [2022-01-31 08:53:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 08:53:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 218. [2022-01-31 08:53:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 182 states have (on average 1.043956043956044) internal successors, (190), 184 states have internal predecessors, (190), 21 states have call successors, (21), 16 states have call predecessors, (21), 14 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 08:53:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 231 transitions. [2022-01-31 08:53:21,313 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 231 transitions. Word has length 110 [2022-01-31 08:53:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 231 transitions. [2022-01-31 08:53:21,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.7551020408163267) internal successors, (184), 48 states have internal predecessors, (184), 21 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-01-31 08:53:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 231 transitions. [2022-01-31 08:53:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 08:53:21,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:21,315 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:53:21,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 08:53:21,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:21,531 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash 275728705, now seen corresponding path program 18 times [2022-01-31 08:53:21,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:21,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850116213] [2022-01-31 08:53:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:21,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 08:53:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:53:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 08:53:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 08:53:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 08:53:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 08:53:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 18 proven. 143 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:53:21,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:21,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850116213] [2022-01-31 08:53:21,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850116213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:21,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100997130] [2022-01-31 08:53:21,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:53:21,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:21,984 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:53:22,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 08:53:22,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 08:53:22,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:53:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-31 08:53:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:22,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:53:22,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:22,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:22,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:22,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:23,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:23,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:23,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:23,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:23,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:23,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:53:23,420 INFO L353 Elim1Store]: treesize reduction 35, result has 51.4 percent of original size [2022-01-31 08:53:23,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 55 [2022-01-31 08:53:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:53:25,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:53:25,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-01-31 08:53:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:53:25,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:26,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-31 08:53:26,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2494 treesize of output 2462 [2022-01-31 08:53:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 30 proven. 131 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:53:27,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100997130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:27,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:27,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 29] total 71 [2022-01-31 08:53:27,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561757212] [2022-01-31 08:53:27,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:27,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 08:53:27,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 08:53:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=4392, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 08:53:27,379 INFO L87 Difference]: Start difference. First operand 218 states and 231 transitions. Second operand has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 70 states have internal predecessors, (212), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 08:53:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:43,729 INFO L93 Difference]: Finished difference Result 295 states and 324 transitions. [2022-01-31 08:53:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 08:53:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 70 states have internal predecessors, (212), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 110 [2022-01-31 08:53:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:43,731 INFO L225 Difference]: With dead ends: 295 [2022-01-31 08:53:43,732 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 08:53:43,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 189 SyntacticMatches, 34 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6229 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=2074, Invalid=14955, Unknown=1, NotChecked=0, Total=17030 [2022-01-31 08:53:43,734 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 239 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 863 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:43,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 658 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1642 Invalid, 0 Unknown, 863 Unchecked, 0.8s Time] [2022-01-31 08:53:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 08:53:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 273. [2022-01-31 08:53:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 228 states have (on average 1.0526315789473684) internal successors, (240), 231 states have internal predecessors, (240), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 08:53:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 297 transitions. [2022-01-31 08:53:43,741 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 297 transitions. Word has length 110 [2022-01-31 08:53:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 297 transitions. [2022-01-31 08:53:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 70 states have internal predecessors, (212), 23 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 08:53:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 297 transitions. [2022-01-31 08:53:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 08:53:43,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:43,743 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:53:43,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 08:53:43,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:43,943 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:43,944 INFO L85 PathProgramCache]: Analyzing trace with hash -583063730, now seen corresponding path program 19 times [2022-01-31 08:53:43,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:43,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773091543] [2022-01-31 08:53:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:43,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 08:53:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:53:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 08:53:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 08:53:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 08:53:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 08:53:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 08:53:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 08:53:44,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773091543] [2022-01-31 08:53:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773091543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159668249] [2022-01-31 08:53:44,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:53:44,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:44,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:44,612 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:53:44,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 08:53:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 08:53:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:44,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:53:44,904 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 08:53:44,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 08:55:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 08:55:10,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:55:13,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:55:13,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 08:55:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 14 proven. 154 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 08:55:13,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159668249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:55:13,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:55:13,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 18] total 44 [2022-01-31 08:55:13,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308890669] [2022-01-31 08:55:13,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:55:13,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 08:55:13,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:55:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 08:55:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1721, Unknown=8, NotChecked=0, Total=1892 [2022-01-31 08:55:13,117 INFO L87 Difference]: Start difference. First operand 273 states and 297 transitions. Second operand has 44 states, 43 states have (on average 3.4186046511627906) internal successors, (147), 41 states have internal predecessors, (147), 17 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 08:55:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:55:22,316 INFO L93 Difference]: Finished difference Result 316 states and 347 transitions. [2022-01-31 08:55:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 08:55:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.4186046511627906) internal successors, (147), 41 states have internal predecessors, (147), 17 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 119 [2022-01-31 08:55:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:55:22,318 INFO L225 Difference]: With dead ends: 316 [2022-01-31 08:55:22,318 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 08:55:22,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 236 SyntacticMatches, 18 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 96.5s TimeCoverageRelationStatistics Valid=905, Invalid=10212, Unknown=13, NotChecked=0, Total=11130 [2022-01-31 08:55:22,319 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 374 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 08:55:22,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 517 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1766 Invalid, 0 Unknown, 90 Unchecked, 0.9s Time] [2022-01-31 08:55:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 08:55:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2022-01-31 08:55:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 244 states have (on average 1.0614754098360655) internal successors, (259), 248 states have internal predecessors, (259), 33 states have call successors, (33), 20 states have call predecessors, (33), 17 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 08:55:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 324 transitions. [2022-01-31 08:55:22,327 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 324 transitions. Word has length 119 [2022-01-31 08:55:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:55:22,328 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 324 transitions. [2022-01-31 08:55:22,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.4186046511627906) internal successors, (147), 41 states have internal predecessors, (147), 17 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 08:55:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 324 transitions. [2022-01-31 08:55:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 08:55:22,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:55:22,329 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:55:22,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 08:55:22,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 08:55:22,551 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:55:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:55:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 555993057, now seen corresponding path program 20 times [2022-01-31 08:55:22,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:55:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779457757] [2022-01-31 08:55:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:55:22,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:55:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:55:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:22,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:55:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 08:55:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:22,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:55:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:22,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 08:55:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:23,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 08:55:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:23,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 08:55:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:23,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 08:55:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:23,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 08:55:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:23,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 08:55:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-01-31 08:55:23,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:55:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779457757] [2022-01-31 08:55:23,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779457757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:55:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426513072] [2022-01-31 08:55:23,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:55:23,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:55:23,016 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:55:23,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 08:55:23,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:55:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:55:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 08:55:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:55:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 180 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-01-31 08:55:24,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:55:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 180 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-01-31 08:55:24,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426513072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:55:24,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:55:24,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 52 [2022-01-31 08:55:24,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539746034] [2022-01-31 08:55:24,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:55:24,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 08:55:24,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:55:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 08:55:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=2055, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 08:55:24,740 INFO L87 Difference]: Start difference. First operand 295 states and 324 transitions. Second operand has 52 states, 52 states have (on average 3.826923076923077) internal successors, (199), 51 states have internal predecessors, (199), 29 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 08:55:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:55:25,525 INFO L93 Difference]: Finished difference Result 325 states and 354 transitions. [2022-01-31 08:55:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:55:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.826923076923077) internal successors, (199), 51 states have internal predecessors, (199), 29 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 128 [2022-01-31 08:55:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:55:25,527 INFO L225 Difference]: With dead ends: 325 [2022-01-31 08:55:25,527 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 08:55:25,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=898, Invalid=3134, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 08:55:25,528 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 333 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:55:25,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 190 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:55:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 08:55:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-01-31 08:55:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 185 states have (on average 1.0702702702702702) internal successors, (198), 188 states have internal predecessors, (198), 27 states have call successors, (27), 14 states have call predecessors, (27), 11 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 08:55:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 251 transitions. [2022-01-31 08:55:25,534 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 251 transitions. Word has length 128 [2022-01-31 08:55:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:55:25,534 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 251 transitions. [2022-01-31 08:55:25,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.826923076923077) internal successors, (199), 51 states have internal predecessors, (199), 29 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 08:55:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 251 transitions. [2022-01-31 08:55:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 08:55:25,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:55:25,536 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:55:25,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 08:55:25,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 08:55:25,755 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:55:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:55:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 451491473, now seen corresponding path program 21 times [2022-01-31 08:55:25,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:55:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858918012] [2022-01-31 08:55:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:55:25,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:55:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:55:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:55:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 08:55:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:55:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 08:55:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:55:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 08:55:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 08:55:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:55:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 08:55:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 60 proven. 209 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-01-31 08:55:26,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:55:26,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858918012] [2022-01-31 08:55:26,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858918012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:55:26,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638082136] [2022-01-31 08:55:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:55:26,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:26,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:55:26,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:55:26,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 08:55:27,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 08:55:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:55:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 08:55:27,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:55:27,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:55:27,710 INFO L353 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-01-31 08:55:27,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 28 [2022-01-31 08:55:27,778 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:55:27,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:55:27,849 INFO L353 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2022-01-31 08:55:27,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 34 [2022-01-31 08:55:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 86 proven. 164 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 08:55:29,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:55:30,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-01-31 08:55:30,537 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 08:55:30,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 132 [2022-01-31 08:55:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-01-31 08:55:30,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638082136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:55:30,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:55:30,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 24] total 69 [2022-01-31 08:55:30,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801262882] [2022-01-31 08:55:30,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:55:30,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 08:55:30,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:55:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 08:55:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=4296, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 08:55:30,913 INFO L87 Difference]: Start difference. First operand 224 states and 251 transitions. Second operand has 69 states, 68 states have (on average 3.338235294117647) internal successors, (227), 67 states have internal predecessors, (227), 28 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-01-31 08:55:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:55:42,388 INFO L93 Difference]: Finished difference Result 267 states and 301 transitions. [2022-01-31 08:55:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 08:55:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.338235294117647) internal successors, (227), 67 states have internal predecessors, (227), 28 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 136 [2022-01-31 08:55:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:55:42,390 INFO L225 Difference]: With dead ends: 267 [2022-01-31 08:55:42,391 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 08:55:42,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 262 SyntacticMatches, 23 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4989 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1847, Invalid=15706, Unknown=3, NotChecked=0, Total=17556 [2022-01-31 08:55:42,393 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 605 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:55:42,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 668 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 2873 Invalid, 0 Unknown, 117 Unchecked, 1.6s Time] [2022-01-31 08:55:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 08:55:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 235. [2022-01-31 08:55:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 193 states have (on average 1.067357512953368) internal successors, (206), 197 states have internal predecessors, (206), 30 states have call successors, (30), 14 states have call predecessors, (30), 11 states have return successors, (29), 23 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 08:55:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2022-01-31 08:55:42,399 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 136 [2022-01-31 08:55:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:55:42,400 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2022-01-31 08:55:42,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.338235294117647) internal successors, (227), 67 states have internal predecessors, (227), 28 states have call successors, (31), 5 states have call predecessors, (31), 3 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-01-31 08:55:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2022-01-31 08:55:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 08:55:42,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:55:42,401 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:55:42,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 08:55:42,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 08:55:42,628 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:55:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:55:42,628 INFO L85 PathProgramCache]: Analyzing trace with hash -54067152, now seen corresponding path program 22 times [2022-01-31 08:55:42,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:55:42,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991717292] [2022-01-31 08:55:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:55:42,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:55:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:55:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:55:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 08:55:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:55:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 08:55:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:55:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 08:55:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 08:55:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:55:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 08:55:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 24 proven. 246 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 08:55:43,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:55:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991717292] [2022-01-31 08:55:43,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991717292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:55:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122459940] [2022-01-31 08:55:43,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:55:43,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:55:43,356 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:55:43,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 08:55:43,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:55:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:55:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 08:55:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:55:43,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:55:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:43,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 08:55:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:43,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:43,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:43,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:44,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:44,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:44,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:44,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:44,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:44,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:44,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:44,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:55:44,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:55:44,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:55:44,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-01-31 08:55:45,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:55:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 24 proven. 246 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 08:55:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:56:57,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:56:57,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 08:56:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 24 proven. 244 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-01-31 08:56:57,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122459940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:56:57,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:56:57,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 27] total 67 [2022-01-31 08:56:57,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031764157] [2022-01-31 08:56:57,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:56:57,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 08:56:57,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:56:57,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 08:56:57,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=4033, Unknown=17, NotChecked=0, Total=4422 [2022-01-31 08:56:57,467 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 67 states, 67 states have (on average 3.8358208955223883) internal successors, (257), 66 states have internal predecessors, (257), 29 states have call successors, (31), 4 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 08:57:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:57:16,000 INFO L93 Difference]: Finished difference Result 528 states and 598 transitions. [2022-01-31 08:57:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 08:57:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.8358208955223883) internal successors, (257), 66 states have internal predecessors, (257), 29 states have call successors, (31), 4 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 136 [2022-01-31 08:57:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:57:16,002 INFO L225 Difference]: With dead ends: 528 [2022-01-31 08:57:16,002 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 08:57:16,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 276 SyntacticMatches, 51 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7419 ImplicationChecksByTransitivity, 89.9s TimeCoverageRelationStatistics Valid=1528, Invalid=17633, Unknown=21, NotChecked=0, Total=19182 [2022-01-31 08:57:16,004 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 591 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 4912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1213 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:57:16,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1065 Invalid, 4912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 3318 Invalid, 0 Unknown, 1213 Unchecked, 1.5s Time] [2022-01-31 08:57:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 08:57:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 368. [2022-01-31 08:57:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 305 states have (on average 1.0557377049180328) internal successors, (322), 310 states have internal predecessors, (322), 43 states have call successors, (43), 22 states have call predecessors, (43), 19 states have return successors, (42), 35 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 08:57:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 407 transitions. [2022-01-31 08:57:16,014 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 407 transitions. Word has length 136 [2022-01-31 08:57:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:57:16,014 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 407 transitions. [2022-01-31 08:57:16,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.8358208955223883) internal successors, (257), 66 states have internal predecessors, (257), 29 states have call successors, (31), 4 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 08:57:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 407 transitions. [2022-01-31 08:57:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 08:57:16,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:57:16,016 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:57:16,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 08:57:16,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:16,231 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:57:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:57:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash 716514290, now seen corresponding path program 23 times [2022-01-31 08:57:16,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:57:16,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389050718] [2022-01-31 08:57:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:57:16,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:57:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:57:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:57:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 08:57:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 08:57:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 08:57:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 08:57:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 08:57:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 08:57:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 136 proven. 74 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 08:57:16,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:57:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389050718] [2022-01-31 08:57:16,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389050718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:57:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785029116] [2022-01-31 08:57:16,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:57:16,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:16,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:57:16,639 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:57:16,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 08:57:18,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 08:57:18,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:57:18,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:57:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:57:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 129 proven. 45 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-01-31 08:57:19,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:57:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 141 proven. 45 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-01-31 08:57:19,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785029116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:57:19,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:57:19,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 27 [2022-01-31 08:57:19,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398636531] [2022-01-31 08:57:19,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:57:19,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 08:57:19,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:57:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 08:57:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:57:19,903 INFO L87 Difference]: Start difference. First operand 368 states and 407 transitions. Second operand has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 26 states have internal predecessors, (117), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:57:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:57:20,338 INFO L93 Difference]: Finished difference Result 501 states and 534 transitions. [2022-01-31 08:57:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:57:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 26 states have internal predecessors, (117), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 134 [2022-01-31 08:57:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:57:20,340 INFO L225 Difference]: With dead ends: 501 [2022-01-31 08:57:20,340 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 08:57:20,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 271 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:57:20,341 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 208 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:57:20,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 96 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:57:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 08:57:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 458. [2022-01-31 08:57:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 377 states have (on average 1.0450928381962865) internal successors, (394), 384 states have internal predecessors, (394), 47 states have call successors, (47), 36 states have call predecessors, (47), 33 states have return successors, (46), 37 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 08:57:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 487 transitions. [2022-01-31 08:57:20,351 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 487 transitions. Word has length 134 [2022-01-31 08:57:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:57:20,352 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 487 transitions. [2022-01-31 08:57:20,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 26 states have internal predecessors, (117), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:57:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 487 transitions. [2022-01-31 08:57:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 08:57:20,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:57:20,354 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:57:20,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 08:57:20,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 08:57:20,563 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:57:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:57:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1509534266, now seen corresponding path program 24 times [2022-01-31 08:57:20,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:57:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438589860] [2022-01-31 08:57:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:57:20,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:57:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:57:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:57:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:57:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 08:57:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 08:57:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 08:57:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 08:57:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 08:57:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 136 proven. 95 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 08:57:20,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:57:20,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438589860] [2022-01-31 08:57:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438589860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:57:20,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232753649] [2022-01-31 08:57:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:57:20,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:20,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:57:20,916 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:57:20,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 08:57:21,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 08:57:21,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:57:21,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 08:57:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:57:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 153 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-01-31 08:57:22,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:57:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 165 proven. 66 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-31 08:57:23,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232753649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:57:23,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:57:23,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 36 [2022-01-31 08:57:23,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724524922] [2022-01-31 08:57:23,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:57:23,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 08:57:23,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:57:23,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 08:57:23,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:57:23,070 INFO L87 Difference]: Start difference. First operand 458 states and 487 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 35 states have internal predecessors, (150), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:57:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:57:25,627 INFO L93 Difference]: Finished difference Result 786 states and 850 transitions. [2022-01-31 08:57:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 08:57:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 35 states have internal predecessors, (150), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 138 [2022-01-31 08:57:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:57:25,634 INFO L225 Difference]: With dead ends: 786 [2022-01-31 08:57:25,634 INFO L226 Difference]: Without dead ends: 786 [2022-01-31 08:57:25,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 271 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2022, Invalid=9320, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 08:57:25,641 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1313 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:57:25,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 254 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 08:57:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-01-31 08:57:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 551. [2022-01-31 08:57:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 462 states have (on average 1.0476190476190477) internal successors, (484), 470 states have internal predecessors, (484), 48 states have call successors, (48), 43 states have call predecessors, (48), 40 states have return successors, (47), 37 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 08:57:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 579 transitions. [2022-01-31 08:57:25,657 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 579 transitions. Word has length 138 [2022-01-31 08:57:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:57:25,657 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 579 transitions. [2022-01-31 08:57:25,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 35 states have internal predecessors, (150), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:57:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 579 transitions. [2022-01-31 08:57:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 08:57:25,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:57:25,660 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:57:25,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 08:57:25,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 08:57:25,875 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:57:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:57:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1260980911, now seen corresponding path program 25 times [2022-01-31 08:57:25,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:57:25,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242220203] [2022-01-31 08:57:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:57:25,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:57:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:57:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:57:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 08:57:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:57:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 08:57:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:57:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 08:57:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 08:57:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 08:57:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 08:57:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 08:57:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-01-31 08:57:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 229 proven. 91 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-31 08:57:26,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:57:26,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242220203] [2022-01-31 08:57:26,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242220203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:57:26,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263165722] [2022-01-31 08:57:26,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:57:26,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:26,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:57:26,528 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:57:26,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 08:57:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:26,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:57:26,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:57:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 275 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-31 08:57:28,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:57:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 275 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-31 08:57:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263165722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:57:28,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:57:28,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 21] total 62 [2022-01-31 08:57:28,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975790290] [2022-01-31 08:57:28,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:57:28,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 08:57:28,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:57:28,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 08:57:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=2946, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 08:57:28,730 INFO L87 Difference]: Start difference. First operand 551 states and 579 transitions. Second operand has 62 states, 62 states have (on average 3.806451612903226) internal successors, (236), 61 states have internal predecessors, (236), 35 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 08:57:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:57:29,545 INFO L93 Difference]: Finished difference Result 590 states and 618 transitions. [2022-01-31 08:57:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:57:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.806451612903226) internal successors, (236), 61 states have internal predecessors, (236), 35 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 154 [2022-01-31 08:57:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:57:29,547 INFO L225 Difference]: With dead ends: 590 [2022-01-31 08:57:29,547 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 08:57:29,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1216, Invalid=4334, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 08:57:29,548 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 593 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:57:29,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 188 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:57:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 08:57:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2022-01-31 08:57:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 344 states have (on average 1.0494186046511629) internal successors, (361), 350 states have internal predecessors, (361), 34 states have call successors, (34), 29 states have call predecessors, (34), 26 states have return successors, (33), 25 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 08:57:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 428 transitions. [2022-01-31 08:57:29,556 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 428 transitions. Word has length 154 [2022-01-31 08:57:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:57:29,556 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 428 transitions. [2022-01-31 08:57:29,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.806451612903226) internal successors, (236), 61 states have internal predecessors, (236), 35 states have call successors, (37), 5 states have call predecessors, (37), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 08:57:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 428 transitions. [2022-01-31 08:57:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 08:57:29,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:57:29,557 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:57:29,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 08:57:29,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:29,771 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:57:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:57:29,772 INFO L85 PathProgramCache]: Analyzing trace with hash -274406126, now seen corresponding path program 26 times [2022-01-31 08:57:29,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:57:29,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084627384] [2022-01-31 08:57:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:57:29,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:57:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:57:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:57:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 08:57:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 08:57:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 08:57:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 08:57:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 08:57:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 08:57:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 46 proven. 365 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:57:32,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:57:32,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084627384] [2022-01-31 08:57:32,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084627384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:57:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930468381] [2022-01-31 08:57:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:57:32,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:57:32,756 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:57:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 08:57:32,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:57:32,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:57:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 08:57:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:57:33,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:57:33,205 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:57:33,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:57:33,262 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,277 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,337 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,352 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,412 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,428 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,493 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,516 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,582 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,596 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,670 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:33,689 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 08:57:33,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 08:57:34,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:57:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 117 proven. 158 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-01-31 08:57:34,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:57:41,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_588 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_588)) (forall ((v_ArrVal_1863 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) |c_main_~#volArray~0.offset| (* 8 v_main_~i~0_588)) v_ArrVal_1863) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)))) is different from false [2022-01-31 08:58:01,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_589 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_589)) (forall ((v_ArrVal_1859 Int) (v_ArrVal_1861 Int) (v_ArrVal_1863 Int) (v_main_~i~0_588 Int)) (or (< (select (store (let ((.cse0 (* 8 v_main_~i~0_589))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) .cse0 |c_main_~#volArray~0.offset|) v_ArrVal_1859) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1861)) (+ (- 4) |c_main_~#volArray~0.offset| (* 8 v_main_~i~0_588)) v_ArrVal_1863) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_589 1) v_main_~i~0_588)))))) is different from false [2022-01-31 08:58:15,616 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_590 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_590)) (forall ((v_ArrVal_1859 Int) (v_ArrVal_1861 Int) (v_ArrVal_1863 Int) (v_ArrVal_1854 Int) (v_main_~i~0_588 Int) (v_ArrVal_1856 Int) (v_main_~i~0_589 Int)) (or (not (<= (+ v_main_~i~0_590 1) v_main_~i~0_589)) (< (select (store (let ((.cse1 (* 8 v_main_~i~0_589))) (store (store (let ((.cse0 (* 8 v_main_~i~0_590))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) .cse0 |c_main_~#volArray~0.offset|) v_ArrVal_1854) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1856)) (+ (- 4) .cse1 |c_main_~#volArray~0.offset|) v_ArrVal_1859) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1861)) (+ (- 4) |c_main_~#volArray~0.offset| (* 8 v_main_~i~0_588)) v_ArrVal_1863) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_589 1) v_main_~i~0_588)))))) is different from false [2022-01-31 08:58:36,113 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_591 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_591)) (forall ((v_ArrVal_1859 Int) (v_ArrVal_1851 Int) (v_main_~i~0_590 Int) (v_ArrVal_1861 Int) (v_ArrVal_1852 Int) (v_ArrVal_1863 Int) (v_ArrVal_1854 Int) (v_main_~i~0_588 Int) (v_ArrVal_1856 Int) (v_main_~i~0_589 Int)) (or (not (<= (+ v_main_~i~0_591 1) v_main_~i~0_590)) (not (<= (+ v_main_~i~0_590 1) v_main_~i~0_589)) (< (select (store (let ((.cse2 (* 8 v_main_~i~0_589))) (store (store (let ((.cse1 (* 8 v_main_~i~0_590))) (store (store (let ((.cse0 (* 8 v_main_~i~0_591))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ .cse0 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_1851) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1852)) (+ (- 4) .cse1 |c_main_~#volArray~0.offset|) v_ArrVal_1854) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1856)) (+ (- 4) .cse2 |c_main_~#volArray~0.offset|) v_ArrVal_1859) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1861)) (+ (- 4) |c_main_~#volArray~0.offset| (* 8 v_main_~i~0_588)) v_ArrVal_1863) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_589 1) v_main_~i~0_588)))))) is different from false [2022-01-31 08:59:04,650 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_592 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_592)) (forall ((v_ArrVal_1859 Int) (v_ArrVal_1849 Int) (v_main_~i~0_591 Int) (v_main_~i~0_590 Int) (v_ArrVal_1851 Int) (v_ArrVal_1861 Int) (v_ArrVal_1852 Int) (v_ArrVal_1863 Int) (v_ArrVal_1854 Int) (v_ArrVal_1846 Int) (v_main_~i~0_588 Int) (v_ArrVal_1856 Int) (v_main_~i~0_589 Int)) (or (not (<= (+ v_main_~i~0_591 1) v_main_~i~0_590)) (not (<= (+ v_main_~i~0_590 1) v_main_~i~0_589)) (not (<= (+ v_main_~i~0_592 1) v_main_~i~0_591)) (< (select (store (let ((.cse3 (* 8 v_main_~i~0_589))) (store (store (let ((.cse2 (* 8 v_main_~i~0_590))) (store (store (let ((.cse1 (* 8 v_main_~i~0_591))) (store (store (let ((.cse0 (* 8 v_main_~i~0_592))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) .cse0 |c_main_~#volArray~0.offset|) v_ArrVal_1846) (+ .cse0 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1849)) (+ .cse1 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_1851) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1852)) (+ (- 4) .cse2 |c_main_~#volArray~0.offset|) v_ArrVal_1854) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1856)) (+ (- 4) .cse3 |c_main_~#volArray~0.offset|) v_ArrVal_1859) (+ .cse3 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1861)) (+ (- 4) |c_main_~#volArray~0.offset| (* 8 v_main_~i~0_588)) v_ArrVal_1863) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_589 1) v_main_~i~0_588)))))) is different from false [2022-01-31 08:59:44,463 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_593 Int)) (or (forall ((v_ArrVal_1859 Int) (v_ArrVal_1849 Int) (v_main_~i~0_591 Int) (v_main_~i~0_592 Int) (v_main_~i~0_590 Int) (v_ArrVal_1851 Int) (v_ArrVal_1861 Int) (v_ArrVal_1842 Int) (v_ArrVal_1852 Int) (v_ArrVal_1863 Int) (v_ArrVal_1844 Int) (v_ArrVal_1854 Int) (v_ArrVal_1846 Int) (v_main_~i~0_588 Int) (v_ArrVal_1856 Int) (v_main_~i~0_589 Int)) (or (not (<= (+ v_main_~i~0_591 1) v_main_~i~0_590)) (not (<= (+ v_main_~i~0_590 1) v_main_~i~0_589)) (not (<= (+ v_main_~i~0_593 1) v_main_~i~0_592)) (not (<= (+ v_main_~i~0_592 1) v_main_~i~0_591)) (< (select (store (let ((.cse4 (* 8 v_main_~i~0_589))) (store (store (let ((.cse3 (* 8 v_main_~i~0_590))) (store (store (let ((.cse2 (* 8 v_main_~i~0_591))) (store (store (let ((.cse1 (* 8 v_main_~i~0_592))) (store (store (let ((.cse0 (* 8 v_main_~i~0_593))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (- 4) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_1842) (+ |c_main_~#volArray~0.offset| .cse0 (- 8)) v_ArrVal_1844)) (+ (- 4) .cse1 |c_main_~#volArray~0.offset|) v_ArrVal_1846) (+ .cse1 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1849)) (+ .cse2 (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_1851) (+ .cse2 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1852)) (+ (- 4) .cse3 |c_main_~#volArray~0.offset|) v_ArrVal_1854) (+ .cse3 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1856)) (+ (- 4) .cse4 |c_main_~#volArray~0.offset|) v_ArrVal_1859) (+ .cse4 |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_1861)) (+ (- 4) |c_main_~#volArray~0.offset| (* 8 v_main_~i~0_588)) v_ArrVal_1863) (+ 20 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0) (not (<= (+ v_main_~i~0_589 1) v_main_~i~0_588)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_593)))) is different from false [2022-01-31 09:00:08,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 111 [2022-01-31 09:00:08,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 463864856552 treesize of output 463856467944