/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-crafted/bAnd3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:32:48,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:32:48,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:32:48,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:32:48,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:32:48,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:32:48,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:32:48,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:32:48,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:32:48,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:32:48,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:32:48,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:32:48,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:32:48,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:32:48,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:32:48,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:32:48,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:32:48,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:32:48,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:32:48,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:32:48,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:32:48,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:32:48,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:32:48,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:32:48,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:32:48,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:32:48,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:32:48,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:32:48,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:32:48,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:32:48,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:32:48,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:32:48,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:32:48,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:32:48,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:32:48,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:32:48,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:32:49,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:32:49,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:32:49,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:32:49,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:32:49,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:32:49,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:32:49,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:32:49,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:32:49,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:32:49,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:32:49,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:32:49,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:32:49,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:32:49,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:32:49,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:32:49,038 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:32:49,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:32:49,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:32:49,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:32:49,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:32:49,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:32:49,253 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:32:49,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd3.i [2022-01-31 09:32:49,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced8dd21a/5d42579a600d4137941063303c9cd9bb/FLAG8d07f9431 [2022-01-31 09:32:49,635 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:32:49,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd3.i [2022-01-31 09:32:49,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced8dd21a/5d42579a600d4137941063303c9cd9bb/FLAG8d07f9431 [2022-01-31 09:32:50,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced8dd21a/5d42579a600d4137941063303c9cd9bb [2022-01-31 09:32:50,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:32:50,051 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:32:50,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:32:50,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:32:50,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:32:50,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b6a21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50, skipping insertion in model container [2022-01-31 09:32:50,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:32:50,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:32:50,206 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-crafted/bAnd3.i[1302,1315] [2022-01-31 09:32:50,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:32:50,213 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:32:50,242 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-crafted/bAnd3.i[1302,1315] [2022-01-31 09:32:50,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:32:50,258 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:32:50,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50 WrapperNode [2022-01-31 09:32:50,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:32:50,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:32:50,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:32:50,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:32:50,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:32:50,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:32:50,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:32:50,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:32:50,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:32:50,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:50,349 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 09:32:50,367 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 09:32:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:32:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:32:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:32:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-01-31 09:32:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:32:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:32:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:32:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 09:32:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 09:32:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:32:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:32:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:32:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-01-31 09:32:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:32:50,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:32:50,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:32:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:32:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:32:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:32:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:32:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:32:50,456 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:32:50,457 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:32:50,618 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:32:50,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:32:50,622 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 09:32:50,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:32:50 BoogieIcfgContainer [2022-01-31 09:32:50,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:32:50,624 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:32:50,624 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:32:50,628 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:32:50,643 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:32:50" (1/1) ... [2022-01-31 09:32:50,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:32:50 BasicIcfg [2022-01-31 09:32:50,662 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:32:50,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:32:50,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:32:50,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:32:50,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:32:50" (1/4) ... [2022-01-31 09:32:50,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99fc64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:32:50, skipping insertion in model container [2022-01-31 09:32:50,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:32:50" (2/4) ... [2022-01-31 09:32:50,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99fc64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:32:50, skipping insertion in model container [2022-01-31 09:32:50,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:32:50" (3/4) ... [2022-01-31 09:32:50,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99fc64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:32:50, skipping insertion in model container [2022-01-31 09:32:50,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:32:50" (4/4) ... [2022-01-31 09:32:50,669 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd3.iJordan [2022-01-31 09:32:50,673 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:32:50,673 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:32:50,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:32:50,710 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 09:32:50,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:32:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:32:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:32:50,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:50,726 INFO L514 BasicCegarLoop]: trace histogram [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 09:32:50,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:50,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:50,730 INFO L85 PathProgramCache]: Analyzing trace with hash 142417289, now seen corresponding path program 1 times [2022-01-31 09:32:50,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:50,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768625503] [2022-01-31 09:32:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:50,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:50,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:32:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:50,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 09:32:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:50,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:32:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 09:32:50,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:50,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768625503] [2022-01-31 09:32:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768625503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:32:50,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:32:50,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:32:50,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665783237] [2022-01-31 09:32:50,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:32:50,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:32:50,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:32:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:32:50,959 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:50,987 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 09:32:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:32:50,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 09:32:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:50,993 INFO L225 Difference]: With dead ends: 31 [2022-01-31 09:32:50,993 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:32:50,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 09:32:50,997 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:32:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:32:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 09:32:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 09:32:51,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 09:32:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:51,020 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 09:32:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 09:32:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:32:51,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:51,022 INFO L514 BasicCegarLoop]: trace histogram [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 09:32:51,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:32:51,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1780278, now seen corresponding path program 1 times [2022-01-31 09:32:51,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:51,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599290272] [2022-01-31 09:32:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:51,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:32:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 09:32:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:32:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:32:51,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599290272] [2022-01-31 09:32:51,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599290272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:51,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475210092] [2022-01-31 09:32:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:51,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:51,176 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 09:32:51,177 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 09:32:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 09:32:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 09:32:51,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:32:51,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475210092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:32:51,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:32:51,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 09:32:51,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797524500] [2022-01-31 09:32:51,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:32:51,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:32:51,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:32:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:32:51,326 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:51,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:51,333 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 09:32:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:32:51,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 09:32:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:51,334 INFO L225 Difference]: With dead ends: 28 [2022-01-31 09:32:51,334 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:32:51,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:32:51,335 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:51,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:32:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:32:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 09:32:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 09:32:51,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 09:32:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:51,340 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 09:32:51,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 09:32:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:32:51,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:51,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 09:32:51,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:32:51,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:51,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:51,572 INFO L85 PathProgramCache]: Analyzing trace with hash 561300940, now seen corresponding path program 1 times [2022-01-31 09:32:51,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:51,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936963150] [2022-01-31 09:32:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:51,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:32:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 09:32:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 09:32:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 09:32:51,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936963150] [2022-01-31 09:32:51,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936963150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:51,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036803373] [2022-01-31 09:32:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:51,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:51,665 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 09:32:51,666 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 09:32:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 09:32:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:32:51,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:32:51,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036803373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:32:51,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:32:51,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 09:32:51,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928429189] [2022-01-31 09:32:51,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:32:51,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:32:51,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:32:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:32:51,780 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:51,789 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 09:32:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:32:51,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 09:32:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:51,790 INFO L225 Difference]: With dead ends: 29 [2022-01-31 09:32:51,790 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 09:32:51,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:32:51,791 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:51,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:32:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 09:32:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 09:32:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 09:32:51,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-31 09:32:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:51,795 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 09:32:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 09:32:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:32:51,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:51,796 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-01-31 09:32:51,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 09:32:51,997 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,SelfDestructingSolverStorable2 [2022-01-31 09:32:51,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1061096375, now seen corresponding path program 1 times [2022-01-31 09:32:51,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:51,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754802693] [2022-01-31 09:32:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:51,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:32:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 09:32:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 09:32:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 09:32:52,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754802693] [2022-01-31 09:32:52,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754802693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:52,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744790956] [2022-01-31 09:32:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:52,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:52,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:52,063 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 09:32:52,064 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 09:32:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 09:32:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:32:52,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:32:52,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744790956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:32:52,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 09:32:52,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 09:32:52,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145476681] [2022-01-31 09:32:52,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:32:52,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:32:52,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:52,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:32:52,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:32:52,230 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:52,261 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 09:32:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:32:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 09:32:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:52,262 INFO L225 Difference]: With dead ends: 30 [2022-01-31 09:32:52,262 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 09:32:52,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:32:52,263 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:52,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:32:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 09:32:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 09:32:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 09:32:52,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-31 09:32:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:52,268 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 09:32:52,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:32:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 09:32:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 09:32:52,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:52,269 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-01-31 09:32:52,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 09:32:52,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:52,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash -619501722, now seen corresponding path program 1 times [2022-01-31 09:32:52,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:52,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973243861] [2022-01-31 09:32:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:52,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 09:32:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 09:32:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 09:32:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:32:52,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:52,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973243861] [2022-01-31 09:32:52,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973243861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:52,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732048605] [2022-01-31 09:32:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:52,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:52,593 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 09:32:52,623 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 09:32:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:32:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:32:52,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:32:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732048605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:52,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:52,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:32:52,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592482467] [2022-01-31 09:32:52,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:32:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:32:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:32:52,824 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:52,910 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 09:32:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:32:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-31 09:32:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:52,911 INFO L225 Difference]: With dead ends: 35 [2022-01-31 09:32:52,911 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 09:32:52,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:32:52,912 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:52,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:32:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 09:32:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 09:32:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 09:32:52,916 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-31 09:32:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:52,916 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 09:32:52,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 09:32:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:32:52,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:52,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2022-01-31 09:32:52,946 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 09:32:53,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:53,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1074871916, now seen corresponding path program 2 times [2022-01-31 09:32:53,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:53,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363428583] [2022-01-31 09:32:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:53,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 09:32:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 09:32:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:32:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 09:32:53,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363428583] [2022-01-31 09:32:53,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363428583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:53,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493325966] [2022-01-31 09:32:53,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:32:53,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:53,284 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 09:32:53,285 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 09:32:53,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:32:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:32:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:32:53,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 09:32:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493325966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:53,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:53,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 09:32:53,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954073062] [2022-01-31 09:32:53,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:53,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:32:53,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:32:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:32:53,547 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 09:32:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:53,728 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-31 09:32:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:32:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-31 09:32:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:53,729 INFO L225 Difference]: With dead ends: 50 [2022-01-31 09:32:53,729 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 09:32:53,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:32:53,730 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:53,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:32:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 09:32:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 09:32:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 09:32:53,734 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-31 09:32:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:53,734 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 09:32:53,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 09:32:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 09:32:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 09:32:53,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:53,735 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 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 09:32:53,751 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 09:32:53,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:53,935 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 859300597, now seen corresponding path program 3 times [2022-01-31 09:32:53,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:53,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399329915] [2022-01-31 09:32:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:53,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:32:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:32:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 09:32:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 09:32:54,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399329915] [2022-01-31 09:32:54,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399329915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963743115] [2022-01-31 09:32:54,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:32:54,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:54,053 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 09:32:54,054 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 09:32:54,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:32:54,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:54,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:32:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-31 09:32:54,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 09:32:54,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963743115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:54,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:54,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:32:54,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798191888] [2022-01-31 09:32:54,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:54,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:32:54,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:32:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:32:54,275 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 09:32:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:54,347 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 09:32:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:32:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-31 09:32:54,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:54,348 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:32:54,348 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:32:54,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:32:54,349 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:54,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:32:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:32:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 09:32:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 09:32:54,353 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-31 09:32:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:54,353 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 09:32:54,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 09:32:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 09:32:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 09:32:54,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:54,354 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 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 09:32:54,370 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 09:32:54,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:54,571 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 49480076, now seen corresponding path program 4 times [2022-01-31 09:32:54,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779374904] [2022-01-31 09:32:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:54,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:32:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:32:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:32:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 09:32:54,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779374904] [2022-01-31 09:32:54,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779374904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:54,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849286877] [2022-01-31 09:32:54,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:32:54,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:54,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:54,704 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 09:32:54,719 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 09:32:54,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:32:54,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:32:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 09:32:54,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 09:32:54,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849286877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:54,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:54,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 09:32:54,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324231738] [2022-01-31 09:32:54,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:54,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:32:54,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:32:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:32:54,976 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:55,086 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-01-31 09:32:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 09:32:55,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-31 09:32:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:55,087 INFO L225 Difference]: With dead ends: 63 [2022-01-31 09:32:55,087 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 09:32:55,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:32:55,088 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:55,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 52 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:32:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 09:32:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-31 09:32:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-01-31 09:32:55,092 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 72 [2022-01-31 09:32:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:55,092 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-01-31 09:32:55,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-01-31 09:32:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 09:32:55,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:55,093 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 4, 4, 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 09:32:55,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 09:32:55,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:55,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1050867968, now seen corresponding path program 5 times [2022-01-31 09:32:55,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987635329] [2022-01-31 09:32:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:55,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:55,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 09:32:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:55,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:32:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:55,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:32:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-31 09:32:55,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:55,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987635329] [2022-01-31 09:32:55,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987635329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:55,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757067566] [2022-01-31 09:32:55,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:32:55,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:55,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:55,445 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 09:32:55,447 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 09:32:55,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 09:32:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:55,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:32:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-01-31 09:32:55,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-01-31 09:32:56,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757067566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:56,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:56,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2022-01-31 09:32:56,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590233352] [2022-01-31 09:32:56,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:56,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 09:32:56,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 09:32:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:32:56,002 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:56,379 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-01-31 09:32:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 09:32:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2022-01-31 09:32:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:56,380 INFO L225 Difference]: With dead ends: 82 [2022-01-31 09:32:56,380 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 09:32:56,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=591, Invalid=2165, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 09:32:56,382 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:56,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 55 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:32:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 09:32:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-31 09:32:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 09:32:56,386 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 96 [2022-01-31 09:32:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:56,387 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 09:32:56,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 09:32:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 09:32:56,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:56,388 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 11, 11, 4, 4, 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 09:32:56,444 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 09:32:56,610 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,SelfDestructingSolverStorable8 [2022-01-31 09:32:56,610 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1731418134, now seen corresponding path program 6 times [2022-01-31 09:32:56,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:56,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631682717] [2022-01-31 09:32:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:56,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:56,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 09:32:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:56,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 09:32:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:56,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 09:32:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-31 09:32:56,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:56,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631682717] [2022-01-31 09:32:56,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631682717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:56,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187992322] [2022-01-31 09:32:56,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:32:56,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:56,751 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 09:32:56,792 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 09:32:57,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 09:32:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:32:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2022-01-31 09:32:57,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-01-31 09:32:57,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187992322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:57,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:57,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2022-01-31 09:32:57,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364312644] [2022-01-31 09:32:57,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:57,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 09:32:57,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 09:32:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:32:57,430 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:57,766 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-01-31 09:32:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:32:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-01-31 09:32:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:57,767 INFO L225 Difference]: With dead ends: 96 [2022-01-31 09:32:57,767 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 09:32:57,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=1694, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 09:32:57,768 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:57,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 60 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:32:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 09:32:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-31 09:32:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-01-31 09:32:57,772 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 146 [2022-01-31 09:32:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-01-31 09:32:57,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-01-31 09:32:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 09:32:57,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:57,774 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 10, 10, 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 09:32:57,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:32:57,983 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,SelfDestructingSolverStorable9 [2022-01-31 09:32:57,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -363890470, now seen corresponding path program 7 times [2022-01-31 09:32:57,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49410581] [2022-01-31 09:32:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:57,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:58,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 09:32:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:58,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:32:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 09:32:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:32:58,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:58,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49410581] [2022-01-31 09:32:58,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49410581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:58,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707785620] [2022-01-31 09:32:58,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:32:58,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:58,137 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 09:32:58,138 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 09:32:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:32:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:32:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:32:58,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:32:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:32:58,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707785620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:32:58,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:32:58,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-01-31 09:32:58,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470586651] [2022-01-31 09:32:58,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:32:58,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:32:58,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:32:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:32:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:32:58,803 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:32:59,167 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2022-01-31 09:32:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 09:32:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 160 [2022-01-31 09:32:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:32:59,168 INFO L225 Difference]: With dead ends: 123 [2022-01-31 09:32:59,168 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 09:32:59,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 09:32:59,169 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:32:59,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 47 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:32:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 09:32:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-01-31 09:32:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:32:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-01-31 09:32:59,174 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 160 [2022-01-31 09:32:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:32:59,174 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-01-31 09:32:59,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:32:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-01-31 09:32:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 09:32:59,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:32:59,175 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 26, 26, 10, 10, 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 09:32:59,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 09:32:59,387 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,SelfDestructingSolverStorable10 [2022-01-31 09:32:59,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:32:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:32:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1362295946, now seen corresponding path program 8 times [2022-01-31 09:32:59,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:32:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780237586] [2022-01-31 09:32:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:32:59,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:32:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:59,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:32:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:59,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:32:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:59,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 09:32:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 09:32:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:32:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:32:59,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:32:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780237586] [2022-01-31 09:32:59,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780237586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:32:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698285512] [2022-01-31 09:32:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:32:59,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:32:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:32:59,776 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 09:32:59,814 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 09:32:59,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:32:59,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:32:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 09:32:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:33:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:33:00,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:33:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:33:01,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698285512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:33:01,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:33:01,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-01-31 09:33:01,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650257246] [2022-01-31 09:33:01,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:33:01,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 09:33:01,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:33:01,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 09:33:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 09:33:01,070 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:33:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:33:02,047 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2022-01-31 09:33:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 09:33:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 188 [2022-01-31 09:33:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:33:02,048 INFO L225 Difference]: With dead ends: 179 [2022-01-31 09:33:02,048 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 09:33:02,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 09:33:02,051 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:33:02,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 52 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:33:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 09:33:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-01-31 09:33:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:33:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-01-31 09:33:02,055 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 188 [2022-01-31 09:33:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:33:02,056 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-01-31 09:33:02,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:33:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-01-31 09:33:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 09:33:02,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:33:02,057 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 42, 42, 10, 10, 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 09:33:02,078 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 09:33:02,267 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,SelfDestructingSolverStorable11 [2022-01-31 09:33:02,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:33:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:33:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 540267182, now seen corresponding path program 9 times [2022-01-31 09:33:02,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:33:02,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401283653] [2022-01-31 09:33:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:33:02,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:33:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:03,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:33:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:03,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 09:33:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:03,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 09:33:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:03,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 09:33:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 09:33:03,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:33:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401283653] [2022-01-31 09:33:03,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401283653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:33:03,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904038885] [2022-01-31 09:33:03,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:33:03,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:33:03,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:33:03,478 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 09:33:03,479 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 09:33:04,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 09:33:04,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:33:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:33:04,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:33:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 3929 trivial. 0 not checked. [2022-01-31 09:33:04,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:33:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4779 trivial. 0 not checked. [2022-01-31 09:33:05,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904038885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:33:05,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:33:05,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 13, 13] total 80 [2022-01-31 09:33:05,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627314225] [2022-01-31 09:33:05,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:33:05,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 09:33:05,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:33:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 09:33:05,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1873, Invalid=4447, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 09:33:05,146 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:33:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:33:06,659 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2022-01-31 09:33:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 09:33:06,660 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 244 [2022-01-31 09:33:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:33:06,663 INFO L225 Difference]: With dead ends: 206 [2022-01-31 09:33:06,663 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 09:33:06,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4763 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5613, Invalid=18879, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 09:33:06,678 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:33:06,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 70 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:33:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 09:33:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-31 09:33:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:33:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2022-01-31 09:33:06,687 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 244 [2022-01-31 09:33:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:33:06,687 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2022-01-31 09:33:06,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:33:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2022-01-31 09:33:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 09:33:06,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:33:06,689 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 42, 42, 22, 22, 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 09:33:06,708 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 09:33:06,903 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,SelfDestructingSolverStorable12 [2022-01-31 09:33:06,903 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:33:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:33:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2087298956, now seen corresponding path program 10 times [2022-01-31 09:33:06,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:33:06,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551540615] [2022-01-31 09:33:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:33:06,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:33:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:08,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:33:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:08,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 09:33:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:08,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 09:33:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-01-31 09:33:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2022-01-31 09:33:08,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:33:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551540615] [2022-01-31 09:33:08,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551540615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:33:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999219466] [2022-01-31 09:33:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:33:08,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:33:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:33:08,122 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 09:33:08,123 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 09:33:08,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:33:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:33:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:33:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:33:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-01-31 09:33:08,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:33:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-01-31 09:33:09,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999219466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:33:09,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:33:09,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 17, 17] total 89 [2022-01-31 09:33:09,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284794302] [2022-01-31 09:33:09,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:33:09,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 09:33:09,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:33:09,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 09:33:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=5682, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 09:33:09,306 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:33:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:33:11,453 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2022-01-31 09:33:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 09:33:11,454 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 270 [2022-01-31 09:33:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:33:11,454 INFO L225 Difference]: With dead ends: 240 [2022-01-31 09:33:11,455 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 09:33:11,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6444, Invalid=24006, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 09:33:11,457 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 205 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:33:11,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 65 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:33:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 09:33:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-31 09:33:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 231 states have (on average 1.0129870129870129) internal successors, (234), 231 states have internal predecessors, (234), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:33:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2022-01-31 09:33:11,461 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 270 [2022-01-31 09:33:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:33:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2022-01-31 09:33:11,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 09:33:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2022-01-31 09:33:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-31 09:33:11,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:33:11,465 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 56, 56, 22, 22, 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 09:33:11,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 09:33:11,683 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,SelfDestructingSolverStorable13 [2022-01-31 09:33:11,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:33:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:33:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash 701145566, now seen corresponding path program 11 times [2022-01-31 09:33:11,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:33:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172169450] [2022-01-31 09:33:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:33:11,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:33:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:12,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:33:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 09:33:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:12,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 09:33:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:12,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2022-01-31 09:33:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:33:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11915 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2022-01-31 09:33:12,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:33:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172169450] [2022-01-31 09:33:12,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172169450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:33:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712737432] [2022-01-31 09:33:12,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:33:12,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:33:12,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:33:12,574 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 09:33:12,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process