/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:39:54,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:39:54,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:39:54,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 09:39:54,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:39:54,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:39:54,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:39:54,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:39:54,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:39:54,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:39:54,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:39:54,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:39:54,128 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:39:54,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:39:54,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:39:54,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:39:54,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:39:54,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 09:39:54,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:39:54,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:39:54,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:39:54,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:39:54,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:39:54,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:39:54,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:39:54,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:39:54,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:39:54,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:39:54,164 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:39:54,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:39:54,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:39:54,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:39:54,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:39:54,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:39:54,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:39:54,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:39:54,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:39:54,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:39:54,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:39:54,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:39:54,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:39:54,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:39:54,167 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:39:54,168 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:39:54,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:39:54,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:39:54,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:39:54,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:39:54,370 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:39:54,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-04-06 09:39:54,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bc44d395/69388a8b25644bb39efd0605072465ef/FLAG889ce363f [2022-04-06 09:39:54,792 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:39:54,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-04-06 09:39:54,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bc44d395/69388a8b25644bb39efd0605072465ef/FLAG889ce363f [2022-04-06 09:39:54,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bc44d395/69388a8b25644bb39efd0605072465ef [2022-04-06 09:39:54,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:39:54,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:39:54,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:39:54,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:39:54,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:39:54,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:39:54" (1/1) ... [2022-04-06 09:39:54,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e40d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:54, skipping insertion in model container [2022-04-06 09:39:54,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:39:54" (1/1) ... [2022-04-06 09:39:54,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:39:54,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:39:55,009 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2022-04-06 09:39:55,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:39:55,040 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:39:55,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2022-04-06 09:39:55,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:39:55,077 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:39:55,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55 WrapperNode [2022-04-06 09:39:55,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:39:55,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:39:55,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:39:55,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:39:55,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:39:55,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:39:55,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:39:55,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:39:55,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:39:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:39:55,136 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) [2022-04-06 09:39:55,159 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 [2022-04-06 09:39:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:39:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:39:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:39:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 09:39:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:39:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:39:55,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:39:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:39:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:39:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:39:55,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:39:55,237 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:39:55,239 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:39:55,408 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:39:55,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:39:55,413 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 09:39:55,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:39:55 BoogieIcfgContainer [2022-04-06 09:39:55,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:39:55,415 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:39:55,415 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:39:55,420 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:39:55,423 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:39:55" (1/1) ... [2022-04-06 09:39:55,424 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:39:55,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:39:55 BasicIcfg [2022-04-06 09:39:55,437 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:39:55,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:39:55,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:39:55,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:39:55,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:39:54" (1/4) ... [2022-04-06 09:39:55,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12482ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:39:55, skipping insertion in model container [2022-04-06 09:39:55,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:39:55" (2/4) ... [2022-04-06 09:39:55,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12482ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:39:55, skipping insertion in model container [2022-04-06 09:39:55,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:39:55" (3/4) ... [2022-04-06 09:39:55,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12482ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:39:55, skipping insertion in model container [2022-04-06 09:39:55,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:39:55" (4/4) ... [2022-04-06 09:39:55,448 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.iqvasr [2022-04-06 09:39:55,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:39:55,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:39:55,493 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:39:55,499 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:39:55,500 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:39:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 09:39:55,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:55,517 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:55,518 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:55,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash -868390563, now seen corresponding path program 1 times [2022-04-06 09:39:55,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:55,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491149017] [2022-04-06 09:39:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:55,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:55,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:39:55,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491149017] [2022-04-06 09:39:55,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491149017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:55,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:55,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:39:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161412900] [2022-04-06 09:39:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:55,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:39:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:39:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:39:55,756 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:39:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:55,964 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2022-04-06 09:39:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:39:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 09:39:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:55,971 INFO L225 Difference]: With dead ends: 88 [2022-04-06 09:39:55,971 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 09:39:55,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:39:55,976 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:55,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 09:39:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-04-06 09:39:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-04-06 09:39:56,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-04-06 09:39:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:56,016 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-04-06 09:39:56,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:39:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-04-06 09:39:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 09:39:56,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:56,017 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:56,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:39:56,018 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:56,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -867437251, now seen corresponding path program 1 times [2022-04-06 09:39:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:56,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338874377] [2022-04-06 09:39:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:39:56,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338874377] [2022-04-06 09:39:56,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338874377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:56,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:56,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:39:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130370640] [2022-04-06 09:39:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:56,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:39:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:39:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:39:56,071 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:39:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:56,287 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-04-06 09:39:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:39:56,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 09:39:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:56,292 INFO L225 Difference]: With dead ends: 55 [2022-04-06 09:39:56,292 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 09:39:56,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:39:56,299 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:56,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 09:39:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-04-06 09:39:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-04-06 09:39:56,314 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2022-04-06 09:39:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:56,314 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-04-06 09:39:56,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:39:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-04-06 09:39:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 09:39:56,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:56,320 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:56,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:39:56,320 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1607544442, now seen corresponding path program 1 times [2022-04-06 09:39:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:56,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123685055] [2022-04-06 09:39:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 09:39:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:39:56,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123685055] [2022-04-06 09:39:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123685055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:56,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:56,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:39:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162532656] [2022-04-06 09:39:56,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:56,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:39:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:39:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:39:56,409 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:39:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:56,564 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-04-06 09:39:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:39:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-04-06 09:39:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:56,568 INFO L225 Difference]: With dead ends: 57 [2022-04-06 09:39:56,568 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 09:39:56,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:39:56,580 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:56,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 09:39:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 09:39:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-04-06 09:39:56,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2022-04-06 09:39:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:56,593 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-04-06 09:39:56,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:39:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-04-06 09:39:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 09:39:56,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:56,593 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:56,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 09:39:56,594 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1153064602, now seen corresponding path program 1 times [2022-04-06 09:39:56,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:56,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023850667] [2022-04-06 09:39:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:56,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 09:39:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:39:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:39:56,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:56,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023850667] [2022-04-06 09:39:56,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023850667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:56,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:56,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 09:39:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404570305] [2022-04-06 09:39:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:56,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 09:39:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 09:39:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 09:39:56,684 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:39:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:56,844 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-04-06 09:39:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 09:39:56,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-06 09:39:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:56,846 INFO L225 Difference]: With dead ends: 61 [2022-04-06 09:39:56,846 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 09:39:56,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 09:39:56,852 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:56,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 59 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 09:39:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 09:39:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-04-06 09:39:56,867 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2022-04-06 09:39:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:56,867 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-04-06 09:39:56,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:39:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-04-06 09:39:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 09:39:56,868 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:56,868 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:56,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 09:39:56,868 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:56,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1359459551, now seen corresponding path program 1 times [2022-04-06 09:39:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:56,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443413056] [2022-04-06 09:39:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 09:39:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:39:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 09:39:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 09:39:56,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:56,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443413056] [2022-04-06 09:39:56,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443413056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:56,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:56,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:39:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538548306] [2022-04-06 09:39:56,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:56,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:39:56,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:39:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:39:56,921 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 09:39:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:57,032 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-04-06 09:39:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:39:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-06 09:39:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:57,036 INFO L225 Difference]: With dead ends: 66 [2022-04-06 09:39:57,036 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 09:39:57,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:39:57,037 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:57,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 09:39:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 09:39:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-04-06 09:39:57,062 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2022-04-06 09:39:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:57,063 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-04-06 09:39:57,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 09:39:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-04-06 09:39:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 09:39:57,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:57,064 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:57,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 09:39:57,064 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1056918318, now seen corresponding path program 1 times [2022-04-06 09:39:57,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:57,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338376498] [2022-04-06 09:39:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:57,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 09:39:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:39:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:39:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:39:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:39:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:39:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 09:39:57,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:57,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338376498] [2022-04-06 09:39:57,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338376498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:57,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:57,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 09:39:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396097269] [2022-04-06 09:39:57,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:57,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 09:39:57,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 09:39:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 09:39:57,177 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 09:39:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:57,331 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-04-06 09:39:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 09:39:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-06 09:39:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:57,332 INFO L225 Difference]: With dead ends: 75 [2022-04-06 09:39:57,332 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 09:39:57,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 09:39:57,333 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:57,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 09:39:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-04-06 09:39:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-04-06 09:39:57,340 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2022-04-06 09:39:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:57,340 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-04-06 09:39:57,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 09:39:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-04-06 09:39:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 09:39:57,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:57,342 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:57,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 09:39:57,342 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1366093938, now seen corresponding path program 1 times [2022-04-06 09:39:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:57,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153824182] [2022-04-06 09:39:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 09:39:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:39:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:39:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:39:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:39:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:39:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:39:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:39:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 09:39:57,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:57,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153824182] [2022-04-06 09:39:57,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153824182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:57,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:57,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 09:39:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583751074] [2022-04-06 09:39:57,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:57,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 09:39:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 09:39:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 09:39:57,428 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 09:39:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:57,602 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-04-06 09:39:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 09:39:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-04-06 09:39:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:57,604 INFO L225 Difference]: With dead ends: 75 [2022-04-06 09:39:57,604 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 09:39:57,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 09:39:57,606 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:57,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 09:39:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-04-06 09:39:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 09:39:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-04-06 09:39:57,627 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2022-04-06 09:39:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:57,627 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-04-06 09:39:57,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 09:39:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-04-06 09:39:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 09:39:57,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:39:57,633 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:57,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 09:39:57,633 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:39:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:39:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash -430516171, now seen corresponding path program 1 times [2022-04-06 09:39:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:39:57,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136670310] [2022-04-06 09:39:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:39:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:39:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:39:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 09:39:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 09:39:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 09:39:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 09:39:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:39:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 09:39:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 09:39:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 09:39:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 09:39:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 09:39:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:39:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 09:39:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:39:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136670310] [2022-04-06 09:39:57,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136670310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:39:57,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:39:57,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 09:39:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796378462] [2022-04-06 09:39:57,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:39:57,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 09:39:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:39:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 09:39:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 09:39:57,738 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 09:39:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:39:57,896 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-04-06 09:39:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 09:39:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2022-04-06 09:39:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:39:57,897 INFO L225 Difference]: With dead ends: 73 [2022-04-06 09:39:57,897 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 09:39:57,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 09:39:57,898 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:39:57,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:39:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 09:39:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 09:39:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 09:39:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 09:39:57,899 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-04-06 09:39:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:39:57,899 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 09:39:57,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 09:39:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 09:39:57,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 09:39:57,901 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 09:39:57,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 09:39:57,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 09:39:58,099 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 09:39:58,100 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 09:39:58,100 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 09:39:58,100 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 09:39:58,100 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 09:39:58,100 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 09:39:58,100 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 09:39:58,100 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 67) the Hoare annotation is: true [2022-04-06 09:39:58,100 INFO L882 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-04-06 09:39:58,100 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2022-04-06 09:39:58,100 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,101 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2022-04-06 09:39:58,101 INFO L882 garLoopResultBuilder]: For program point L34-3(lines 34 65) no Hoare annotation was computed. [2022-04-06 09:39:58,101 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,101 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 63) no Hoare annotation was computed. [2022-04-06 09:39:58,101 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-04-06 09:39:58,101 INFO L878 garLoopResultBuilder]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,101 INFO L878 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-04-06 09:39:58,101 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,101 INFO L882 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,102 INFO L882 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-04-06 09:39:58,102 INFO L882 garLoopResultBuilder]: For program point L60(line 60) no Hoare annotation was computed. [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L40-1(line 40) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ 5 main_~j~0) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~i~0 2) main_~len~0)) [2022-04-06 09:39:58,102 INFO L882 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2022-04-06 09:39:58,102 INFO L878 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,103 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,103 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,103 INFO L882 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2022-04-06 09:39:58,103 INFO L878 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,103 INFO L882 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-04-06 09:39:58,103 INFO L878 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,103 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2022-04-06 09:39:58,103 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-06 09:39:58,103 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-04-06 09:39:58,103 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-04-06 09:39:58,103 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-04-06 09:39:58,104 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-04-06 09:39:58,104 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-04-06 09:39:58,106 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:39:58,107 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 09:39:58,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:39:58 BasicIcfg [2022-04-06 09:39:58,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 09:39:58,116 INFO L158 Benchmark]: Toolchain (without parser) took 3292.68ms. Allocated memory was 175.1MB in the beginning and 257.9MB in the end (delta: 82.8MB). Free memory was 149.5MB in the beginning and 157.9MB in the end (delta: -8.4MB). Peak memory consumption was 74.6MB. Max. memory is 8.0GB. [2022-04-06 09:39:58,116 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 134.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 09:39:58,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.49ms. Allocated memory was 175.1MB in the beginning and 257.9MB in the end (delta: 82.8MB). Free memory was 149.5MB in the beginning and 229.8MB in the end (delta: -80.3MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-04-06 09:39:58,117 INFO L158 Benchmark]: Boogie Preprocessor took 34.90ms. Allocated memory is still 257.9MB. Free memory was 229.8MB in the beginning and 228.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 09:39:58,117 INFO L158 Benchmark]: RCFGBuilder took 299.14ms. Allocated memory is still 257.9MB. Free memory was 228.2MB in the beginning and 216.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 09:39:58,117 INFO L158 Benchmark]: IcfgTransformer took 22.60ms. Allocated memory is still 257.9MB. Free memory was 216.3MB in the beginning and 214.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:39:58,117 INFO L158 Benchmark]: TraceAbstraction took 2677.30ms. Allocated memory is still 257.9MB. Free memory was 214.2MB in the beginning and 157.9MB in the end (delta: 56.3MB). Peak memory consumption was 57.1MB. Max. memory is 8.0GB. [2022-04-06 09:39:58,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 134.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 253.49ms. Allocated memory was 175.1MB in the beginning and 257.9MB in the end (delta: 82.8MB). Free memory was 149.5MB in the beginning and 229.8MB in the end (delta: -80.3MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.90ms. Allocated memory is still 257.9MB. Free memory was 229.8MB in the beginning and 228.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 299.14ms. Allocated memory is still 257.9MB. Free memory was 228.2MB in the beginning and 216.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 22.60ms. Allocated memory is still 257.9MB. Free memory was 216.3MB in the beginning and 214.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2677.30ms. Allocated memory is still 257.9MB. Free memory was 214.2MB in the beginning and 157.9MB in the end (delta: 56.3MB). Peak memory consumption was 57.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 250 mSDsluCounter, 459 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 489 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1489 IncrementalHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 489 mSolverCounterUnsat, 294 mSDtfsCounter, 1489 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 374 HoareAnnotationTreeSize, 55 FomulaSimplifications, 98 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 532 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((i + 1 <= len && 0 <= j) && 5 + j <= bufsize) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize RESULT: Ultimate proved your program to be correct! [2022-04-06 09:39:58,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...