/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/reducercommutativity/sum40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:48:16,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:48:16,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:48:16,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:48:16,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:48:16,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:48:16,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:48:16,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:48:16,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:48:16,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:48:17,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:48:17,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:48:17,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:48:17,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:48:17,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:48:17,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:48:17,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:48:17,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:48:17,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:48:17,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:48:17,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:48:17,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:48:17,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:48:17,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:48:17,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:48:17,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:48:17,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:48:17,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:48:17,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:48:17,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:48:17,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:48:17,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:48:17,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:48:17,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:48:17,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:48:17,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:48:17,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:48:17,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:48:17,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:48:17,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:48:17,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:48:17,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:48:17,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:48:17,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:48:17,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:48:17,051 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:48:17,051 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:48:17,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:48:17,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:48:17,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:48:17,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:48:17,283 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:48:17,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum40-2.i [2022-01-31 08:48:17,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71477ab21/01225e1942764a32be84df1ad284b427/FLAG2eac2e683 [2022-01-31 08:48:17,732 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:48:17,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i [2022-01-31 08:48:17,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71477ab21/01225e1942764a32be84df1ad284b427/FLAG2eac2e683 [2022-01-31 08:48:17,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71477ab21/01225e1942764a32be84df1ad284b427 [2022-01-31 08:48:17,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:48:17,769 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:48:17,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:48:17,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:48:17,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:48:17,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:48:17" (1/1) ... [2022-01-31 08:48:17,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6490705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:17, skipping insertion in model container [2022-01-31 08:48:17,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:48:17" (1/1) ... [2022-01-31 08:48:17,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:48:17,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:48:17,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i[1277,1290] [2022-01-31 08:48:17,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:48:17,976 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:48:17,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i[1277,1290] [2022-01-31 08:48:17,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:48:17,999 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:48:18,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18 WrapperNode [2022-01-31 08:48:18,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:48:18,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:48:18,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:48:18,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:48:18,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:48:18,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:48:18,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:48:18,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:48:18,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:48:18,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:18,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:48:18,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:48:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:48:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:48:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:48:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-31 08:48:18,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:48:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:48:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:48:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:48:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:48:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:48:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:48:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:48:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-31 08:48:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:48:18,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:48:18,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:48:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:48:18,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:48:18,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:48:18,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:48:18,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:48:18,156 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:48:18,157 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:48:18,306 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:48:18,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:48:18,310 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:48:18,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:18 BoogieIcfgContainer [2022-01-31 08:48:18,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:48:18,312 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:48:18,312 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:48:18,313 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:48:18,316 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:18" (1/1) ... [2022-01-31 08:48:18,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:48:18 BasicIcfg [2022-01-31 08:48:18,332 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:48:18,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:48:18,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:48:18,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:48:18,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:48:17" (1/4) ... [2022-01-31 08:48:18,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf93de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:48:18, skipping insertion in model container [2022-01-31 08:48:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:18" (2/4) ... [2022-01-31 08:48:18,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf93de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:48:18, skipping insertion in model container [2022-01-31 08:48:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:18" (3/4) ... [2022-01-31 08:48:18,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf93de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:48:18, skipping insertion in model container [2022-01-31 08:48:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:48:18" (4/4) ... [2022-01-31 08:48:18,339 INFO L111 eAbstractionObserver]: Analyzing ICFG sum40-2.iJordan [2022-01-31 08:48:18,344 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:48:18,344 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:48:18,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:48:18,390 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:48:18,390 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:48:18,400 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 08:48:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:48:18,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:18,406 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 08:48:18,407 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash 142417289, now seen corresponding path program 1 times [2022-01-31 08:48:18,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:18,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328625905] [2022-01-31 08:48:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:18,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:48:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:48:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:48:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,606 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 08:48:18,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:18,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328625905] [2022-01-31 08:48:18,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328625905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:18,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:48:18,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:48:18,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783753162] [2022-01-31 08:48:18,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:18,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:48:18,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:48:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:48:18,647 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 08:48:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:18,685 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 08:48:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:48:18,687 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 08:48:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:18,696 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:48:18,696 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 08:48:18,698 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 08:48:18,701 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 08:48:18,702 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 08:48:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 08:48:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 08:48:18,725 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 08:48:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 08:48:18,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 08:48:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:18,730 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 08:48:18,731 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 08:48:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 08:48:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:48:18,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:18,733 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 08:48:18,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:48:18,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1780278, now seen corresponding path program 1 times [2022-01-31 08:48:18,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:18,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164309987] [2022-01-31 08:48:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:18,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:48:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:48:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:48:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,856 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 08:48:18,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164309987] [2022-01-31 08:48:18,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164309987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356426486] [2022-01-31 08:48:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:18,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:18,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:48:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:48:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:19,062 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 08:48:19,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:48:19,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356426486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:19,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:48:19,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:48:19,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323743654] [2022-01-31 08:48:19,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:48:19,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:48:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:48:19,079 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 08:48:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:19,091 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 08:48:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:48:19,092 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 08:48:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:19,093 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:48:19,093 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 08:48:19,094 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 08:48:19,094 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 08:48:19,095 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 08:48:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 08:48:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 08:48:19,104 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 08:48:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 08:48:19,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 08:48:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:19,107 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 08:48:19,107 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 08:48:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 08:48:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:48:19,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:19,108 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 08:48:19,150 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 08:48:19,327 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 08:48:19,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash 561300940, now seen corresponding path program 1 times [2022-01-31 08:48:19,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:19,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399552821] [2022-01-31 08:48:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:19,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:48:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:48:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:48:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,456 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 08:48:19,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399552821] [2022-01-31 08:48:19,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399552821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613495804] [2022-01-31 08:48:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:19,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:19,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:19,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:19,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:48:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:48:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:19,596 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 08:48:19,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:48:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613495804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:19,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:48:19,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:48:19,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124803265] [2022-01-31 08:48:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:19,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:48:19,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:48:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:48:19,598 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 08:48:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:19,606 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 08:48:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:48:19,606 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 08:48:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:19,607 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:48:19,607 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:48:19,607 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 08:48:19,608 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 08:48:19,608 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 08:48:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:48:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:48:19,611 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 08:48:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:48:19,612 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-31 08:48:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:19,612 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:48:19,612 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 08:48:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:48:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:48:19,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:19,613 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 08:48:19,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:19,829 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 08:48:19,830 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1061096375, now seen corresponding path program 1 times [2022-01-31 08:48:19,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:19,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764741029] [2022-01-31 08:48:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:19,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:48:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:48:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:48:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,929 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 08:48:19,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:19,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764741029] [2022-01-31 08:48:19,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764741029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992361974] [2022-01-31 08:48:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:19,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:19,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:19,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:48:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:48:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:20,055 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 08:48:20,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:48:20,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992361974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:48:20,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:48:20,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:48:20,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578586397] [2022-01-31 08:48:20,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:48:20,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:48:20,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:48:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:48:20,060 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 08:48:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:20,073 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 08:48:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:48:20,073 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 08:48:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:20,074 INFO L225 Difference]: With dead ends: 30 [2022-01-31 08:48:20,074 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:48:20,074 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 08:48:20,077 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 08:48:20,077 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 08:48:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:48:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:48:20,083 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 08:48:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 08:48:20,085 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-31 08:48:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:20,086 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 08:48:20,086 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 08:48:20,086 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 08:48:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 08:48:20,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:20,087 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 08:48:20,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:20,304 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 08:48:20,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash -619501722, now seen corresponding path program 1 times [2022-01-31 08:48:20,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:20,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488532151] [2022-01-31 08:48:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:20,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:48:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:48:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:48:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,381 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 08:48:20,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:20,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488532151] [2022-01-31 08:48:20,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488532151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:20,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744860219] [2022-01-31 08:48:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:20,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:20,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:20,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:48:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:48:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:20,535 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 08:48:20,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:20,635 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 08:48:20,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744860219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:20,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:20,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:48:20,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066881771] [2022-01-31 08:48:20,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:20,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:48:20,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:48:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:48:20,637 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 08:48:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:20,705 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 08:48:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:48:20,705 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 08:48:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:20,706 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:48:20,706 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:48:20,706 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 08:48:20,706 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:20,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:48:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:48:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:48:20,709 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 08:48:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 08:48:20,709 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-31 08:48:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:20,709 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 08:48:20,710 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 08:48:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 08:48:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:48:20,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:20,710 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 08:48:20,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:20,926 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 08:48:20,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1074871916, now seen corresponding path program 2 times [2022-01-31 08:48:20,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:20,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061421920] [2022-01-31 08:48:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:20,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:48:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 08:48:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:48:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:20,995 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 08:48:20,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:20,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061421920] [2022-01-31 08:48:20,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061421920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:20,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735264246] [2022-01-31 08:48:20,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:48:20,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:20,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:20,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:20,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:48:21,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:48:21,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:48:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:21,158 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 08:48:21,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:21,273 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 08:48:21,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735264246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:21,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:21,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:48:21,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613896016] [2022-01-31 08:48:21,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:21,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:48:21,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:21,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:48:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:48:21,275 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 08:48:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:21,446 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-31 08:48:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:48:21,446 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 08:48:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:21,447 INFO L225 Difference]: With dead ends: 50 [2022-01-31 08:48:21,447 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:48:21,447 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 08:48:21,448 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 08:48:21,448 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 08:48:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:48:21,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 08:48:21,450 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 08:48:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 08:48:21,451 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-31 08:48:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 08:48:21,451 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 08:48:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 08:48:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 08:48:21,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:21,452 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 08:48:21,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:21,655 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 08:48:21,655 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash 859300597, now seen corresponding path program 3 times [2022-01-31 08:48:21,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874659387] [2022-01-31 08:48:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:21,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:21,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:48:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:21,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 08:48:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:21,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:48:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:21,723 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 08:48:21,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:21,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874659387] [2022-01-31 08:48:21,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874659387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:21,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536750131] [2022-01-31 08:48:21,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:48:21,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:21,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:21,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:21,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:48:21,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:48:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:48:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:21,854 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 08:48:21,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:21,923 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 08:48:21,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536750131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:21,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:21,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:48:21,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132145700] [2022-01-31 08:48:21,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:48:21,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:48:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:48:21,925 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 08:48:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:21,982 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 08:48:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:48:21,982 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 08:48:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:21,984 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:48:21,984 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 08:48:21,984 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 08:48:21,984 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 08:48:21,985 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 08:48:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 08:48:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 08:48:21,991 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 08:48:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 08:48:21,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-31 08:48:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 08:48:21,992 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 08:48:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 08:48:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:48:21,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:21,994 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 08:48:22,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:22,210 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 08:48:22,211 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 49480076, now seen corresponding path program 4 times [2022-01-31 08:48:22,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622533690] [2022-01-31 08:48:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:22,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:22,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:22,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:48:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:22,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 08:48:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:22,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 08:48:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-31 08:48:22,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622533690] [2022-01-31 08:48:22,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622533690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139919275] [2022-01-31 08:48:22,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:48:22,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:22,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:22,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:48:22,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:48:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:48:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:22,495 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 08:48:22,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:22,590 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 08:48:22,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139919275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:22,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:22,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 08:48:22,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210679016] [2022-01-31 08:48:22,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:22,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:48:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:48:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:48:22,592 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 08:48:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:22,830 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-01-31 08:48:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:48:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 72 [2022-01-31 08:48:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:22,831 INFO L225 Difference]: With dead ends: 66 [2022-01-31 08:48:22,831 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 08:48:22,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:48:22,832 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:22,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 08:48:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 08:48:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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 08:48:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-31 08:48:22,835 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2022-01-31 08:48:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:22,835 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-31 08:48:22,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 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 08:48:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-31 08:48:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 08:48:22,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:22,836 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 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 08:48:22,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:23,050 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 08:48:23,052 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2077107966, now seen corresponding path program 5 times [2022-01-31 08:48:23,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869745759] [2022-01-31 08:48:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:23,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:23,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:23,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:48:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 08:48:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:23,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 08:48:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-31 08:48:23,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869745759] [2022-01-31 08:48:23,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869745759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13310823] [2022-01-31 08:48:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:48:23,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:23,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:23,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:23,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:48:23,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 08:48:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:48:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-01-31 08:48:23,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 08:48:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13310823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:24,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:24,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 08:48:24,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169895535] [2022-01-31 08:48:24,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:48:24,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:48:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:48:24,165 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 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 08:48:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:24,544 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-01-31 08:48:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:48:24,545 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 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 98 [2022-01-31 08:48:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:24,545 INFO L225 Difference]: With dead ends: 84 [2022-01-31 08:48:24,545 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 08:48:24,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 08:48:24,547 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:24,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 45 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 08:48:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 08:48:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 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 08:48:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-31 08:48:24,550 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2022-01-31 08:48:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-31 08:48:24,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 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 08:48:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-31 08:48:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 08:48:24,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:24,552 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 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 08:48:24,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:24,752 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 08:48:24,753 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1610204012, now seen corresponding path program 6 times [2022-01-31 08:48:24,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:24,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275306553] [2022-01-31 08:48:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:24,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:24,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:24,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:48:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:24,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:48:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:24,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 08:48:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-31 08:48:24,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275306553] [2022-01-31 08:48:24,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275306553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429707261] [2022-01-31 08:48:24,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:48:24,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:24,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:24,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:48:25,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 08:48:25,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:48:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2022-01-31 08:48:25,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2022-01-31 08:48:25,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429707261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:25,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:25,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 08:48:25,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253546216] [2022-01-31 08:48:25,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:25,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:48:25,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:48:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:48:25,559 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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 08:48:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:25,919 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-01-31 08:48:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:48:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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 148 [2022-01-31 08:48:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:25,920 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:48:25,920 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 08:48:25,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 08:48:25,921 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:25,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 08:48:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 08:48:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 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 08:48:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-31 08:48:25,925 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2022-01-31 08:48:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-31 08:48:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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 08:48:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-31 08:48:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 08:48:25,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:25,927 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 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 08:48:25,947 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 08:48:26,136 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 08:48:26,136 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash -463648548, now seen corresponding path program 7 times [2022-01-31 08:48:26,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:26,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667682288] [2022-01-31 08:48:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:26,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:48:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:26,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 08:48:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 08:48:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:48:26,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667682288] [2022-01-31 08:48:26,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667682288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911672369] [2022-01-31 08:48:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:48:26,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:26,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:26,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:26,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 08:48:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:26,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:48:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:48:26,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:48:27,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911672369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:27,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:27,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-31 08:48:27,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701041237] [2022-01-31 08:48:27,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:27,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:48:27,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:48:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:48:27,012 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 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 08:48:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:27,473 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-01-31 08:48:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:48:27,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 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 162 [2022-01-31 08:48:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:27,474 INFO L225 Difference]: With dead ends: 127 [2022-01-31 08:48:27,474 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 08:48:27,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 08:48:27,475 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:27,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 47 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 08:48:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-31 08:48:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 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 08:48:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-31 08:48:27,479 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2022-01-31 08:48:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:27,479 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-31 08:48:27,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 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 08:48:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-31 08:48:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 08:48:27,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:27,481 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 28, 28, 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 08:48:27,514 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 08:48:27,695 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 08:48:27,695 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1903557882, now seen corresponding path program 8 times [2022-01-31 08:48:27,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:27,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068275182] [2022-01-31 08:48:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:27,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:28,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:48:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:28,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 08:48:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 08:48:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:48:28,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068275182] [2022-01-31 08:48:28,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068275182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612114894] [2022-01-31 08:48:28,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:48:28,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:28,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:28,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 08:48:28,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:48:28,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 08:48:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:48:28,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:48:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612114894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:28,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:28,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 44 [2022-01-31 08:48:28,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203131477] [2022-01-31 08:48:28,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:28,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 08:48:28,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 08:48:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:48:28,914 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 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 08:48:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:29,706 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-01-31 08:48:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 08:48:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 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 192 [2022-01-31 08:48:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:29,708 INFO L225 Difference]: With dead ends: 151 [2022-01-31 08:48:29,708 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 08:48:29,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 08:48:29,710 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:29,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 08:48:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-01-31 08:48:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 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 08:48:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-31 08:48:29,728 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 192 [2022-01-31 08:48:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:29,728 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-31 08:48:29,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 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 08:48:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-31 08:48:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 08:48:29,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:29,729 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 40, 40, 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 08:48:29,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:29,947 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 08:48:29,947 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1135004690, now seen corresponding path program 9 times [2022-01-31 08:48:29,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965291319] [2022-01-31 08:48:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:29,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:30,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:30,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:48:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 08:48:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:30,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 08:48:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3563 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 2519 trivial. 0 not checked. [2022-01-31 08:48:30,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965291319] [2022-01-31 08:48:30,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965291319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182773272] [2022-01-31 08:48:30,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:48:30,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:30,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:30,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:48:30,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 08:48:30,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:48:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3563 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 2613 trivial. 0 not checked. [2022-01-31 08:48:31,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3563 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3463 trivial. 0 not checked. [2022-01-31 08:48:31,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182773272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:31,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:31,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 40 [2022-01-31 08:48:31,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910172344] [2022-01-31 08:48:31,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:31,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 08:48:31,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 08:48:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:48:31,494 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 2 states have call successors, (8), 3 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 08:48:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:32,199 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-01-31 08:48:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 08:48:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 2 states have call successors, (8), 3 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 216 [2022-01-31 08:48:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:32,200 INFO L225 Difference]: With dead ends: 178 [2022-01-31 08:48:32,200 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 08:48:32,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1233, Invalid=4619, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 08:48:32,202 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:32,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 65 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:48:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 08:48:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-01-31 08:48:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 169 states have (on average 1.017751479289941) internal successors, (172), 169 states have internal predecessors, (172), 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 08:48:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-01-31 08:48:32,206 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 216 [2022-01-31 08:48:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:32,206 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-01-31 08:48:32,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 2 states have call successors, (8), 3 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 08:48:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-01-31 08:48:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 08:48:32,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:32,207 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 40, 40, 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 08:48:32,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:32,426 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 08:48:32,427 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 880581611, now seen corresponding path program 10 times [2022-01-31 08:48:32,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:32,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836260658] [2022-01-31 08:48:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:32,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:32,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:48:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:32,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 08:48:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 08:48:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 3021 trivial. 0 not checked. [2022-01-31 08:48:32,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836260658] [2022-01-31 08:48:32,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836260658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082366548] [2022-01-31 08:48:32,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:48:32,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:32,688 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:32,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 08:48:32,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:48:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:32,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 08:48:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 964 proven. 225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2022-01-31 08:48:33,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:48:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 3021 trivial. 0 not checked. [2022-01-31 08:48:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082366548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:48:33,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:48:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-01-31 08:48:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882337258] [2022-01-31 08:48:33,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:48:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:48:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:48:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:48:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:48:33,604 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:48:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:34,118 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-01-31 08:48:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:48:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-01-31 08:48:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:34,120 INFO L225 Difference]: With dead ends: 211 [2022-01-31 08:48:34,120 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 08:48:34,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 08:48:34,124 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:34,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 57 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:48:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 08:48:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-01-31 08:48:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 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 08:48:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-01-31 08:48:34,132 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 246 [2022-01-31 08:48:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:34,133 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-01-31 08:48:34,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:48:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-01-31 08:48:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-31 08:48:34,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:34,135 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 40, 40, 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 08:48:34,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:34,343 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 08:48:34,343 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1241279480, now seen corresponding path program 11 times [2022-01-31 08:48:34,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342893774] [2022-01-31 08:48:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:34,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:34,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:48:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:34,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 08:48:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:34,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2022-01-31 08:48:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11507 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 6251 trivial. 0 not checked. [2022-01-31 08:48:34,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342893774] [2022-01-31 08:48:34,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342893774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:34,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003625957] [2022-01-31 08:48:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:48:34,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:34,936 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:34,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 08:57:43,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2022-01-31 08:57:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:57:43,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 08:57:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:57:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11507 backedges. 4228 proven. 1024 refuted. 0 times theorem prover too weak. 6255 trivial. 0 not checked. [2022-01-31 08:57:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:57:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11507 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 6251 trivial. 0 not checked. [2022-01-31 08:57:44,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003625957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:57:44,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:57:44,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 43 [2022-01-31 08:57:44,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827977980] [2022-01-31 08:57:44,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:57:44,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 08:57:44,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:57:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 08:57:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:57:44,839 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:57:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:57:45,580 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2022-01-31 08:57:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 08:57:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 348 [2022-01-31 08:57:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:57:45,586 INFO L225 Difference]: With dead ends: 227 [2022-01-31 08:57:45,586 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 08:57:45,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 696 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 08:57:45,590 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:57:45,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 42 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:57:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 08:57:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-01-31 08:57:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 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 08:57:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-01-31 08:57:45,604 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 348 [2022-01-31 08:57:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:57:45,604 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-01-31 08:57:45,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:57:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-01-31 08:57:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-31 08:57:45,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:57:45,606 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 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 08:57:45,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 08:57:45,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:45,807 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:57:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:57:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1758944992, now seen corresponding path program 12 times [2022-01-31 08:57:45,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:57:45,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265036528] [2022-01-31 08:57:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:57:45,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:57:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:46,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:57:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:46,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:57:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:46,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 08:57:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2022-01-31 08:57:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-01-31 08:57:46,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:57:46,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265036528] [2022-01-31 08:57:46,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265036528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:57:46,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188037639] [2022-01-31 08:57:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:57:46,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:57:46,272 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:57:46,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 08:58:24,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-01-31 08:58:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:58:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 08:58:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:58:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 6570 proven. 484 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2022-01-31 08:58:24,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:58:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-01-31 08:58:25,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188037639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:58:25,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:58:25,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 43 [2022-01-31 08:58:25,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520071766] [2022-01-31 08:58:25,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:58:25,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 08:58:25,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:58:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 08:58:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:58:25,511 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 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 08:58:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:58:26,205 INFO L93 Difference]: Finished difference Result 261 states and 265 transitions. [2022-01-31 08:58:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 08:58:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 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 396 [2022-01-31 08:58:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:58:26,206 INFO L225 Difference]: With dead ends: 261 [2022-01-31 08:58:26,206 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 08:58:26,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 782 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 08:58:26,208 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:58:26,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 62 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:58:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 08:58:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-01-31 08:58:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 253 states have (on average 1.0118577075098814) internal successors, (256), 253 states have internal predecessors, (256), 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 08:58:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2022-01-31 08:58:26,212 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 396 [2022-01-31 08:58:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:58:26,212 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2022-01-31 08:58:26,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 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 08:58:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2022-01-31 08:58:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 08:58:26,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:58:26,214 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:58:26,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-31 08:58:26,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 08:58:26,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:58:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:58:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1997896691, now seen corresponding path program 13 times [2022-01-31 08:58:26,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:58:26,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499326676] [2022-01-31 08:58:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:58:26,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:58:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:05,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:01:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 09:01:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 09:01:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat