/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/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:42:49,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:42:49,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:42:49,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:42:49,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:42:49,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:42:49,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:42:49,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:42:49,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:42:49,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:42:49,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:42:49,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:42:49,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:42:49,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:42:49,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:42:49,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:42:49,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:42:49,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:42:49,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:42:49,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:42:49,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:42:49,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:42:49,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:42:49,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:42:49,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:42:49,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:42:49,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:42:49,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:42:49,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:42:49,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:42:49,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:42:49,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:42:49,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:42:49,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:42:49,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:42:49,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:42:49,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:42:49,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:42:49,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:42:49,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:42:49,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:42:49,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:42:49,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:42:49,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:42:49,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:42:49,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:42:49,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:42:49,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:42:49,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:42:49,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:42:49,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:42:49,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:42:49,286 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:42:49,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:42:49,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:42:49,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:42:49,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:42:49,523 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:42:49,525 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:42:49,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2022-01-31 08:42:49,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb466c27/e06a62be96044b648fc8ccddc5733fa2/FLAGbbdc0d268 [2022-01-31 08:42:49,925 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:42:49,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2022-01-31 08:42:49,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb466c27/e06a62be96044b648fc8ccddc5733fa2/FLAGbbdc0d268 [2022-01-31 08:42:49,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb466c27/e06a62be96044b648fc8ccddc5733fa2 [2022-01-31 08:42:49,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:42:49,957 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:42:49,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:42:49,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:42:49,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:42:49,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:42:49" (1/1) ... [2022-01-31 08:42:49,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26395d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:49, skipping insertion in model container [2022-01-31 08:42:49,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:42:49" (1/1) ... [2022-01-31 08:42:49,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:42:49,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:42:50,122 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/sep60-2.i[1293,1306] [2022-01-31 08:42:50,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:42:50,128 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:42:50,141 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/sep60-2.i[1293,1306] [2022-01-31 08:42:50,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:42:50,150 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:42:50,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50 WrapperNode [2022-01-31 08:42:50,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:42:50,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:42:50,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:42:50,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:42:50,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:42:50,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:42:50,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:42:50,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:42:50,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:42:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:50,244 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 08:42:50,253 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 08:42:50,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:42:50,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:42:50,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:42:50,277 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-31 08:42:50,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:42:50,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:42:50,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:42:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:42:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:42:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:42:50,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:42:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:42:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-31 08:42:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:42:50,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:42:50,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:42:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:42:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:42:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:42:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:42:50,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:42:50,330 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:42:50,331 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:42:50,460 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:42:50,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:42:50,465 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:42:50,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:42:50 BoogieIcfgContainer [2022-01-31 08:42:50,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:42:50,466 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:42:50,467 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:42:50,478 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:42:50,481 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:42:50" (1/1) ... [2022-01-31 08:42:50,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:42:50 BasicIcfg [2022-01-31 08:42:50,494 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:42:50,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:42:50,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:42:50,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:42:50,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:42:49" (1/4) ... [2022-01-31 08:42:50,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146e4f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:42:50, skipping insertion in model container [2022-01-31 08:42:50,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:42:50" (2/4) ... [2022-01-31 08:42:50,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146e4f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:42:50, skipping insertion in model container [2022-01-31 08:42:50,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:42:50" (3/4) ... [2022-01-31 08:42:50,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146e4f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:42:50, skipping insertion in model container [2022-01-31 08:42:50,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:42:50" (4/4) ... [2022-01-31 08:42:50,513 INFO L111 eAbstractionObserver]: Analyzing ICFG sep60-2.iJordan [2022-01-31 08:42:50,517 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:42:50,518 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:42:50,593 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:42:50,597 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 08:42:50,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:42:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 08:42:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:42:50,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:50,619 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 08:42:50,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 820388973, now seen corresponding path program 1 times [2022-01-31 08:42:50,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:50,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829980915] [2022-01-31 08:42:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:50,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:50,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:50,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:42:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:50,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:50,846 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 08:42:50,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:50,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829980915] [2022-01-31 08:42:50,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829980915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:42:50,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:42:50,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:42:50,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751771356] [2022-01-31 08:42:50,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:42:50,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:42:50,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:42:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:42:50,877 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 08:42:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:50,917 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-31 08:42:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:42:50,920 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 08:42:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:50,931 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:42:50,931 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:42:50,933 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 08:42:50,936 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 08:42:50,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:42:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:42:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 08:42:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 08:42:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 08:42:50,966 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2022-01-31 08:42:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:50,967 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 08:42:50,967 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 08:42:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 08:42:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:42:50,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:50,969 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 08:42:50,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:42:50,969 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash 676191406, now seen corresponding path program 1 times [2022-01-31 08:42:50,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:50,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832837382] [2022-01-31 08:42:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:50,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:42:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:42:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:42:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,109 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 08:42:51,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832837382] [2022-01-31 08:42:51,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832837382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667223540] [2022-01-31 08:42:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:51,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:51,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:51,128 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 08:42:51,129 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 08:42:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:42:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:51,284 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 08:42:51,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:42:51,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667223540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:42:51,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:42:51,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:42:51,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391123551] [2022-01-31 08:42:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:42:51,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:42:51,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:42:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:42:51,297 INFO L87 Difference]: Start difference. First operand 27 states and 32 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 08:42:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:51,312 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-01-31 08:42:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:42:51,312 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 08:42:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:51,313 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:42:51,314 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:42:51,314 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 08:42:51,315 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 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 08:42:51,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:42:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:42:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:42:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 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 08:42:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 08:42:51,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2022-01-31 08:42:51,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:51,326 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 08:42:51,326 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 08:42:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 08:42:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:42:51,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:51,328 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 08:42:51,352 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 08:42:51,542 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 08:42:51,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash -941288240, now seen corresponding path program 1 times [2022-01-31 08:42:51,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:51,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130015164] [2022-01-31 08:42:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:51,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:42:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:42:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:42:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,633 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 08:42:51,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:51,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130015164] [2022-01-31 08:42:51,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130015164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179392717] [2022-01-31 08:42:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:51,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:51,652 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 08:42:51,692 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 08:42:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:42:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:51,837 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 08:42:51,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:42:51,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179392717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:42:51,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:42:51,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:42:51,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636252712] [2022-01-31 08:42:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:42:51,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:42:51,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:42:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:42:51,839 INFO L87 Difference]: Start difference. First operand 28 states and 33 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 08:42:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:51,848 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-01-31 08:42:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:42:51,848 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 08:42:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:51,849 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:42:51,849 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:42:51,850 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 08:42:51,851 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 58 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 08:42:51,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:42:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:42:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-31 08:42:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 08:42:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 08:42:51,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2022-01-31 08:42:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:51,859 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 08:42:51,859 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 08:42:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 08:42:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 08:42:51,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:51,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:51,885 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 08:42:52,079 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 08:42:52,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -996630189, now seen corresponding path program 1 times [2022-01-31 08:42:52,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:52,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583126005] [2022-01-31 08:42:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:52,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:42:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:42:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:42:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-31 08:42:52,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583126005] [2022-01-31 08:42:52,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583126005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532245990] [2022-01-31 08:42:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:52,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:52,136 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 08:42:52,138 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 08:42:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:42:52,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:42:52,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:42:52,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532245990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:42:52,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:42:52,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:42:52,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441933358] [2022-01-31 08:42:52,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:42:52,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:42:52,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:42:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:42:52,266 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 08:42:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:52,273 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-31 08:42:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:42:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 43 [2022-01-31 08:42:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:52,274 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:42:52,274 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:42:52,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 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 08:42:52,275 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 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 08:42:52,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:42:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:42:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 08:42:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 08:42:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 08:42:52,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2022-01-31 08:42:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:52,280 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 08:42:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 08:42:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 08:42:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 08:42:52,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:52,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:52,318 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 08:42:52,503 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 08:42:52,504 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:52,505 INFO L85 PathProgramCache]: Analyzing trace with hash -673044969, now seen corresponding path program 1 times [2022-01-31 08:42:52,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:52,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125754595] [2022-01-31 08:42:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:52,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:42:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:42:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:42:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:42:52,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125754595] [2022-01-31 08:42:52,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125754595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805129576] [2022-01-31 08:42:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:52,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:52,560 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 08:42:52,573 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 08:42:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:42:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:42:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:42:52,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805129576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:52,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:52,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:42:52,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851921642] [2022-01-31 08:42:52,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:42:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:42:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:42:52,795 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 08:42:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:52,872 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 08:42:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:42:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 45 [2022-01-31 08:42:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:52,873 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:42:52,873 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 08:42:52,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 08:42:52,874 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:52,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:42:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 08:42:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 08:42:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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 08:42:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 08:42:52,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 45 [2022-01-31 08:42:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:52,877 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 08:42:52,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 08:42:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 08:42:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 08:42:52,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:52,878 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:42:52,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 08:42:53,110 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 08:42:53,110 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash -322190095, now seen corresponding path program 2 times [2022-01-31 08:42:53,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:53,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899422555] [2022-01-31 08:42:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:53,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:53,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:53,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:42:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:53,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:42:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:53,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:42:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:42:53,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899422555] [2022-01-31 08:42:53,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899422555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469058104] [2022-01-31 08:42:53,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:42:53,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:53,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:53,225 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 08:42:53,226 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 08:42:53,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:42:53,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:42:53,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:42:53,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 08:42:53,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469058104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:53,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:53,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:42:53,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34306782] [2022-01-31 08:42:53,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:53,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:42:53,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:42:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:42:53,541 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 08:42:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:53,745 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-01-31 08:42:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:42:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 51 [2022-01-31 08:42:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:53,746 INFO L225 Difference]: With dead ends: 53 [2022-01-31 08:42:53,746 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 08:42:53,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 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 08:42:53,747 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:53,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:42:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 08:42:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-01-31 08:42:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 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 08:42:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-01-31 08:42:53,750 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 51 [2022-01-31 08:42:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:53,751 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-01-31 08:42:53,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 08:42:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-01-31 08:42:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:42:53,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:53,752 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 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 08:42:53,771 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 08:42:53,967 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 08:42:53,968 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1650423198, now seen corresponding path program 3 times [2022-01-31 08:42:53,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174381923] [2022-01-31 08:42:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:53,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:42:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:42:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 08:42:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:42:54,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:54,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174381923] [2022-01-31 08:42:54,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174381923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:54,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913654041] [2022-01-31 08:42:54,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:42:54,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:54,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:54,057 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 08:42:54,062 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 08:42:54,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:42:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:42:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:54,222 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-31 08:42:54,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-31 08:42:54,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913654041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:54,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:54,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:42:54,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162900770] [2022-01-31 08:42:54,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:54,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:42:54,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:42:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:42:54,332 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 08:42:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:54,415 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-01-31 08:42:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:42:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 72 [2022-01-31 08:42:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:54,416 INFO L225 Difference]: With dead ends: 57 [2022-01-31 08:42:54,416 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 08:42:54,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 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 08:42:54,431 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:54,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:42:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 08:42:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 08:42:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 08:42:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 08:42:54,435 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 72 [2022-01-31 08:42:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:54,435 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 08:42:54,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 08:42:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 08:42:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:42:54,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:54,436 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 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 08:42:54,463 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 08:42:54,636 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 08:42:54,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash 831180370, now seen corresponding path program 4 times [2022-01-31 08:42:54,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:54,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779876370] [2022-01-31 08:42:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:54,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:42:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:42:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:42:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-31 08:42:54,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779876370] [2022-01-31 08:42:54,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779876370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626941001] [2022-01-31 08:42:54,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:42:54,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:54,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:54,770 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 08:42:54,771 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 08:42:54,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:42:54,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:54,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:42:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-31 08:42:54,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-31 08:42:55,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626941001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:55,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:55,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 08:42:55,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878379132] [2022-01-31 08:42:55,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:55,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:42:55,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:42:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:42:55,087 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 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 08:42:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:55,384 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2022-01-31 08:42:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:42:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 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 78 [2022-01-31 08:42:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:55,385 INFO L225 Difference]: With dead ends: 72 [2022-01-31 08:42:55,385 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:42:55,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:42:55,386 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:55,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 67 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:42:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:42:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 08:42:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 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 08:42:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-31 08:42:55,390 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 78 [2022-01-31 08:42:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:55,390 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-31 08:42:55,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 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 08:42:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-31 08:42:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 08:42:55,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:55,391 INFO L514 BasicCegarLoop]: trace histogram [18, 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 08:42:55,409 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 08:42:55,608 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 08:42:55,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash -223833676, now seen corresponding path program 5 times [2022-01-31 08:42:55,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:55,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420930503] [2022-01-31 08:42:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:55,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:55,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:55,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:42:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 08:42:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 08:42:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-31 08:42:55,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420930503] [2022-01-31 08:42:55,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420930503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122743277] [2022-01-31 08:42:55,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:42:55,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:55,770 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 08:42:55,771 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 08:42:56,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-31 08:42:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:42:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-01-31 08:42:56,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-31 08:42:56,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122743277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:56,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:56,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 08:42:56,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8020518] [2022-01-31 08:42:56,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:56,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:42:56,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:42:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:42:56,781 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 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 08:42:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:57,243 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2022-01-31 08:42:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:42:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 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 116 [2022-01-31 08:42:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:57,244 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:42:57,244 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 08:42:57,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 240 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 08:42:57,246 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 167 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:57,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 52 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:42:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 08:42:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 08:42:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 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 08:42:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2022-01-31 08:42:57,250 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 116 [2022-01-31 08:42:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:57,251 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2022-01-31 08:42:57,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 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 08:42:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2022-01-31 08:42:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 08:42:57,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:57,252 INFO L514 BasicCegarLoop]: trace histogram [42, 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 08:42:57,273 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 08:42:57,471 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 08:42:57,471 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash 502059094, now seen corresponding path program 6 times [2022-01-31 08:42:57,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:57,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247192472] [2022-01-31 08:42:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:57,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:57,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:57,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:42:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:42:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:57,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 08:42:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2022-01-31 08:42:57,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247192472] [2022-01-31 08:42:57,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247192472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157237942] [2022-01-31 08:42:57,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:42:57,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:57,702 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 08:42:57,703 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 08:42:57,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 08:42:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:42:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:42:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1242 proven. 16 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-01-31 08:42:58,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:42:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-31 08:42:58,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157237942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:42:58,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:42:58,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 08:42:58,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726344245] [2022-01-31 08:42:58,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:42:58,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:42:58,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:42:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:42:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:42:58,455 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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 08:42:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:42:58,814 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-01-31 08:42:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:42:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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 190 [2022-01-31 08:42:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:42:58,816 INFO L225 Difference]: With dead ends: 112 [2022-01-31 08:42:58,816 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 08:42:58,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 378 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 08:42:58,817 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:42:58,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:42:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 08:42:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 08:42:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 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 08:42:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2022-01-31 08:42:58,822 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 190 [2022-01-31 08:42:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:42:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2022-01-31 08:42:58,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 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 08:42:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2022-01-31 08:42:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 08:42:58,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:42:58,823 INFO L514 BasicCegarLoop]: trace histogram [42, 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 08:42:58,844 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 08:42:59,035 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 08:42:59,035 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:42:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:42:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1107414944, now seen corresponding path program 7 times [2022-01-31 08:42:59,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:42:59,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015982925] [2022-01-31 08:42:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:42:59,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:42:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:42:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:42:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:59,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 08:42:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:59,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 08:42:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:42:59,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:42:59,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015982925] [2022-01-31 08:42:59,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015982925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:42:59,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879881144] [2022-01-31 08:42:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:42:59,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:42:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:42:59,292 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 08:42:59,343 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 08:42:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:42:59,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:42:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:42:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:42:59,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:43:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879881144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:43:00,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:43:00,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-31 08:43:00,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549542014] [2022-01-31 08:43:00,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:43:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:43:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:43:00,146 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 08:43:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:00,564 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2022-01-31 08:43:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:43:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 204 [2022-01-31 08:43:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:00,567 INFO L225 Difference]: With dead ends: 141 [2022-01-31 08:43:00,567 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 08:43:00,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 401 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 08:43:00,568 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:00,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 54 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:43:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 08:43:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-31 08:43:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 133 states have internal predecessors, (150), 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 08:43:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2022-01-31 08:43:00,584 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 204 [2022-01-31 08:43:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:00,584 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2022-01-31 08:43:00,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 08:43:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2022-01-31 08:43:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 08:43:00,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:00,586 INFO L514 BasicCegarLoop]: trace histogram [42, 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 08:43:00,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 08:43:00,786 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 08:43:00,787 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1855062238, now seen corresponding path program 8 times [2022-01-31 08:43:00,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533382148] [2022-01-31 08:43:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:00,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:43:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:01,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 08:43:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 08:43:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:43:01,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533382148] [2022-01-31 08:43:01,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533382148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112883139] [2022-01-31 08:43:01,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:43:01,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:01,291 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 08:43:01,292 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 08:43:01,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:43:01,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:43:01,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 08:43:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:43:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:43:01,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:43:02,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112883139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:43:02,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:43:02,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-01-31 08:43:02,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851415777] [2022-01-31 08:43:02,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:02,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 08:43:02,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 08:43:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 08:43:02,841 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 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 08:43:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:04,214 INFO L93 Difference]: Finished difference Result 201 states and 219 transitions. [2022-01-31 08:43:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 08:43:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 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 234 [2022-01-31 08:43:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:04,215 INFO L225 Difference]: With dead ends: 201 [2022-01-31 08:43:04,215 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 08:43:04,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 08:43:04,219 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:04,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 69 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:43:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 08:43:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-31 08:43:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 193 states have internal predecessors, (210), 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 08:43:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 219 transitions. [2022-01-31 08:43:04,223 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 219 transitions. Word has length 234 [2022-01-31 08:43:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 219 transitions. [2022-01-31 08:43:04,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 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 08:43:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 219 transitions. [2022-01-31 08:43:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 08:43:04,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:04,226 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 42, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:43:04,244 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 08:43:04,444 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 08:43:04,444 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1148374950, now seen corresponding path program 9 times [2022-01-31 08:43:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693626967] [2022-01-31 08:43:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:04,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:05,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:05,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 08:43:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:05,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 08:43:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-01-31 08:43:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6188 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-31 08:43:05,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693626967] [2022-01-31 08:43:05,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693626967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3956750] [2022-01-31 08:43:05,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:43:05,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:05,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:05,764 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 08:43:05,766 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 08:43:06,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 08:43:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:43:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:43:06,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:43:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6188 backedges. 1242 proven. 100 refuted. 0 times theorem prover too weak. 4846 trivial. 0 not checked. [2022-01-31 08:43:06,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6188 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6088 trivial. 0 not checked. [2022-01-31 08:43:07,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3956750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:43:07,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:43:07,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2022-01-31 08:43:07,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563991261] [2022-01-31 08:43:07,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:07,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 08:43:07,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 08:43:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 08:43:07,480 INFO L87 Difference]: Start difference. First operand 201 states and 219 transitions. Second operand has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 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 08:43:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:09,724 INFO L93 Difference]: Finished difference Result 228 states and 246 transitions. [2022-01-31 08:43:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 08:43:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 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 294 [2022-01-31 08:43:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:09,726 INFO L225 Difference]: With dead ends: 228 [2022-01-31 08:43:09,726 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 08:43:09,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 08:43:09,731 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:09,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 102 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:43:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 08:43:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-01-31 08:43:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0776255707762556) internal successors, (236), 219 states have internal predecessors, (236), 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 08:43:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2022-01-31 08:43:09,735 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 294 [2022-01-31 08:43:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:09,736 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2022-01-31 08:43:09,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 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 08:43:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2022-01-31 08:43:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 08:43:09,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:09,738 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 42, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:43:09,766 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 08:43:09,957 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 08:43:09,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1944894924, now seen corresponding path program 10 times [2022-01-31 08:43:09,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467105647] [2022-01-31 08:43:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:09,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 08:43:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:11,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 08:43:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:11,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-01-31 08:43:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6689 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 3208 trivial. 0 not checked. [2022-01-31 08:43:11,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467105647] [2022-01-31 08:43:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467105647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670730561] [2022-01-31 08:43:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:43:11,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:11,310 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 08:43:11,311 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 08:43:11,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:43:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:43:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 08:43:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:43:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6689 backedges. 1240 proven. 287 refuted. 0 times theorem prover too weak. 5162 trivial. 0 not checked. [2022-01-31 08:43:12,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:43:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6689 backedges. 1240 proven. 287 refuted. 0 times theorem prover too weak. 5162 trivial. 0 not checked. [2022-01-31 08:43:13,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670730561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:43:13,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:43:13,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2022-01-31 08:43:13,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776079689] [2022-01-31 08:43:13,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:43:13,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 08:43:13,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:43:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 08:43:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 08:43:13,086 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 93 states, 93 states have (on average 2.5698924731182795) internal successors, (239), 92 states have internal predecessors, (239), 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 08:43:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:43:15,921 INFO L93 Difference]: Finished difference Result 277 states and 311 transitions. [2022-01-31 08:43:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 08:43:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.5698924731182795) internal successors, (239), 92 states have internal predecessors, (239), 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 320 [2022-01-31 08:43:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:43:15,922 INFO L225 Difference]: With dead ends: 277 [2022-01-31 08:43:15,922 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 08:43:15,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 08:43:15,925 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 400 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:43:15,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 52 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:43:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 08:43:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-01-31 08:43:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 269 states have (on average 1.1226765799256506) internal successors, (302), 269 states have internal predecessors, (302), 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 08:43:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 311 transitions. [2022-01-31 08:43:15,930 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 311 transitions. Word has length 320 [2022-01-31 08:43:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:43:15,930 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 311 transitions. [2022-01-31 08:43:15,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.5698924731182795) internal successors, (239), 92 states have internal predecessors, (239), 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 08:43:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 311 transitions. [2022-01-31 08:43:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 08:43:15,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:43:15,932 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 60, 60, 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 08:43:15,950 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 08:43:16,140 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 08:43:16,141 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:43:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:43:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash -640084754, now seen corresponding path program 11 times [2022-01-31 08:43:16,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:43:16,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165702867] [2022-01-31 08:43:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:43:16,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:43:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:43:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:16,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 08:43:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-01-31 08:43:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:16,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2022-01-31 08:43:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:43:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 6863 refuted. 0 times theorem prover too weak. 9521 trivial. 0 not checked. [2022-01-31 08:43:16,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:43:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165702867] [2022-01-31 08:43:16,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165702867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:43:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678953448] [2022-01-31 08:43:16,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:43:16,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:43:16,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:43:16,840 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 08:43:16,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process