/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/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:47:31,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:47:31,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:47:31,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:47:31,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:47:31,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:47:31,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:47:31,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:47:31,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:47:31,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:47:31,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:47:31,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:47:31,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:47:31,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:47:31,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:47:31,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:47:31,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:47:31,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:47:31,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:47:31,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:47:31,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:47:31,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:47:31,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:47:31,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:47:31,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 20:47:31,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:47:31,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:47:31,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:47:31,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:47:31,910 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:47:31,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:47:31,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:47:31,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:47:31,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:47:31,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:47:31,912 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:47:31,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:47:31,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:47:31,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:47:31,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:47:31,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:47:31,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:47:31,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:47:31,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:47:31,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:47:31,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:47:31,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:47:31,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:47:31,915 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:47:31,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:47:32,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:47:32,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:47:32,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:47:32,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:47:32,102 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:47:32,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-02-23 20:47:32,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b714ab8b1/23babd19809641ad95a92cc3ec17aa60/FLAG336534141 [2022-02-23 20:47:32,470 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:47:32,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-02-23 20:47:32,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b714ab8b1/23babd19809641ad95a92cc3ec17aa60/FLAG336534141 [2022-02-23 20:47:32,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b714ab8b1/23babd19809641ad95a92cc3ec17aa60 [2022-02-23 20:47:32,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:47:32,920 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:47:32,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:47:32,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:47:32,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:47:32,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:47:32" (1/1) ... [2022-02-23 20:47:32,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691bf285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:32, skipping insertion in model container [2022-02-23 20:47:32,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:47:32" (1/1) ... [2022-02-23 20:47:32,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:47:32,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:47:33,081 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/apache-get-tag.i[893,906] [2022-02-23 20:47:33,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:47:33,113 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:47:33,123 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/apache-get-tag.i[893,906] [2022-02-23 20:47:33,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:47:33,151 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:47:33,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33 WrapperNode [2022-02-23 20:47:33,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:47:33,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:47:33,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:47:33,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:47:33,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:47:33,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:47:33,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:47:33,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:47:33,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:47:33,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:47:33,200 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) [2022-02-23 20:47:33,214 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 [2022-02-23 20:47:33,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:47:33,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:47:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:47:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 20:47:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:47:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:47:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:47:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:47:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:47:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:47:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:47:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:47:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:47:33,291 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:47:33,292 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:47:33,409 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:47:33,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:47:33,414 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 20:47:33,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:47:33 BoogieIcfgContainer [2022-02-23 20:47:33,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:47:33,416 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:47:33,416 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:47:33,420 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:47:33,422 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:47:33" (1/1) ... [2022-02-23 20:47:33,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:47:33 BasicIcfg [2022-02-23 20:47:33,445 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:47:33,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:47:33,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:47:33,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:47:33,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:47:32" (1/4) ... [2022-02-23 20:47:33,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6c69f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:47:33, skipping insertion in model container [2022-02-23 20:47:33,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:47:33" (2/4) ... [2022-02-23 20:47:33,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6c69f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:47:33, skipping insertion in model container [2022-02-23 20:47:33,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:47:33" (3/4) ... [2022-02-23 20:47:33,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6c69f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:47:33, skipping insertion in model container [2022-02-23 20:47:33,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:47:33" (4/4) ... [2022-02-23 20:47:33,452 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.iqvasr [2022-02-23 20:47:33,455 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:47:33,455 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:47:33,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:47:33,490 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:47:33,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:47:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 20:47:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-23 20:47:33,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:47:33,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:47:33,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:47:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:47:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1788024088, now seen corresponding path program 1 times [2022-02-23 20:47:33,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:47:33,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83354137] [2022-02-23 20:47:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:47:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:47:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:47:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:47:33,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:47:33,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83354137] [2022-02-23 20:47:33,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83354137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:47:33,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:47:33,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 20:47:33,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139184808] [2022-02-23 20:47:33,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:47:33,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 20:47:33,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:47:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 20:47:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:47:33,649 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-02-23 20:47:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:47:33,719 INFO L93 Difference]: Finished difference Result 88 states and 157 transitions. [2022-02-23 20:47:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 20:47:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-02-23 20:47:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:47:33,726 INFO L225 Difference]: With dead ends: 88 [2022-02-23 20:47:33,726 INFO L226 Difference]: Without dead ends: 43 [2022-02-23 20:47:33,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:47:33,733 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:47:33,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 57 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:47:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-23 20:47:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-23 20:47:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 20:47:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-23 20:47:33,767 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 13 [2022-02-23 20:47:33,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:47:33,768 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-23 20:47:33,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-02-23 20:47:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-23 20:47:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 20:47:33,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:47:33,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:47:33,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:47:33,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:47:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:47:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash -347621339, now seen corresponding path program 1 times [2022-02-23 20:47:33,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:47:33,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170486320] [2022-02-23 20:47:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:47:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:47:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:33,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:47:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:47:33,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:47:33,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170486320] [2022-02-23 20:47:33,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170486320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:47:33,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:47:33,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 20:47:33,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10446684] [2022-02-23 20:47:33,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:47:33,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 20:47:33,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:47:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 20:47:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 20:47:33,873 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) [2022-02-23 20:47:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:47:34,055 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-02-23 20:47:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:47:34,056 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 [2022-02-23 20:47:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:47:34,057 INFO L225 Difference]: With dead ends: 49 [2022-02-23 20:47:34,057 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 20:47:34,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 20:47:34,059 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:47:34,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 54 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:47:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 20:47:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-23 20:47:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 20:47:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-02-23 20:47:34,068 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 14 [2022-02-23 20:47:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:47:34,068 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-02-23 20:47:34,068 INFO L471 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) [2022-02-23 20:47:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-02-23 20:47:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 20:47:34,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:47:34,069 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:47:34,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:47:34,070 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:47:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:47:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2003510572, now seen corresponding path program 1 times [2022-02-23 20:47:34,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:47:34,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758169450] [2022-02-23 20:47:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:47:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:47:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:47:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-23 20:47:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:47:34,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:47:34,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758169450] [2022-02-23 20:47:34,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758169450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:47:34,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:47:34,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 20:47:34,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246641539] [2022-02-23 20:47:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:47:34,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 20:47:34,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:47:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 20:47:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-23 20:47:34,177 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-02-23 20:47:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:47:34,381 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2022-02-23 20:47:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 20:47:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 [2022-02-23 20:47:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:47:34,383 INFO L225 Difference]: With dead ends: 62 [2022-02-23 20:47:34,383 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 20:47:34,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:47:34,384 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:47:34,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 63 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:47:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 20:47:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-02-23 20:47:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 20:47:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-02-23 20:47:34,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 19 [2022-02-23 20:47:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:47:34,390 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-02-23 20:47:34,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-02-23 20:47:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-02-23 20:47:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 20:47:34,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:47:34,391 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:47:34,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 20:47:34,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:47:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:47:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2142117223, now seen corresponding path program 1 times [2022-02-23 20:47:34,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:47:34,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571243216] [2022-02-23 20:47:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:47:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:47:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:47:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 20:47:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:47:34,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:47:34,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571243216] [2022-02-23 20:47:34,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571243216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:47:34,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:47:34,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 20:47:34,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118463186] [2022-02-23 20:47:34,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:47:34,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 20:47:34,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:47:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 20:47:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 20:47:34,445 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-02-23 20:47:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:47:34,607 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-02-23 20:47:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 20:47:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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 20 [2022-02-23 20:47:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:47:34,609 INFO L225 Difference]: With dead ends: 60 [2022-02-23 20:47:34,609 INFO L226 Difference]: Without dead ends: 58 [2022-02-23 20:47:34,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-23 20:47:34,610 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:47:34,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:47:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-23 20:47:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-02-23 20:47:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 20:47:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-02-23 20:47:34,617 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2022-02-23 20:47:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:47:34,617 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-02-23 20:47:34,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-02-23 20:47:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-02-23 20:47:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 20:47:34,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:47:34,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:47:34,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 20:47:34,619 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:47:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:47:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1358705581, now seen corresponding path program 1 times [2022-02-23 20:47:34,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:47:34,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379844072] [2022-02-23 20:47:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:47:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:47:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:47:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 20:47:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-23 20:47:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-23 20:47:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 20:47:34,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:47:34,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379844072] [2022-02-23 20:47:34,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379844072] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:47:34,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552364415] [2022-02-23 20:47:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:47:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:47:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:47:34,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 20:47:34,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 20:47:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:47:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 20:47:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:47:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 20:47:35,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:47:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-23 20:47:35,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552364415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:47:35,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:47:35,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 16 [2022-02-23 20:47:35,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125736298] [2022-02-23 20:47:35,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:47:35,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 20:47:35,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:47:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 20:47:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-23 20:47:35,137 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-23 20:47:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:47:35,448 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2022-02-23 20:47:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 20:47:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 34 [2022-02-23 20:47:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:47:35,448 INFO L225 Difference]: With dead ends: 80 [2022-02-23 20:47:35,449 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 20:47:35,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-02-23 20:47:35,450 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:47:35,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 61 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 20:47:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 20:47:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 20:47:35,451 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) [2022-02-23 20:47:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 20:47:35,451 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-02-23 20:47:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:47:35,451 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 20:47:35,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (15), 4 states have call predecessors, (15), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-02-23 20:47:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 20:47:35,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 20:47:35,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 20:47:35,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 20:47:35,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:47:35,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 20:47:35,837 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 20:47:35,837 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 20:47:35,837 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 20:47:35,838 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 20:47:35,838 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 20:47:35,838 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 20:47:35,838 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 20:47:35,838 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 24 77) the Hoare annotation is: true [2022-02-23 20:47:35,839 INFO L858 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-02-23 20:47:35,839 INFO L858 garLoopResultBuilder]: For program point L29-1(line 29) no Hoare annotation was computed. [2022-02-23 20:47:35,839 INFO L861 garLoopResultBuilder]: At program point L74(lines 25 77) the Hoare annotation is: true [2022-02-23 20:47:35,839 INFO L854 garLoopResultBuilder]: At program point L32-2(lines 32 44) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,839 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 24 77) no Hoare annotation was computed. [2022-02-23 20:47:35,839 INFO L854 garLoopResultBuilder]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,840 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 37) no Hoare annotation was computed. [2022-02-23 20:47:35,840 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 24 77) no Hoare annotation was computed. [2022-02-23 20:47:35,840 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,840 INFO L854 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,840 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 40) no Hoare annotation was computed. [2022-02-23 20:47:35,840 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-02-23 20:47:35,840 INFO L854 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,841 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,841 INFO L854 garLoopResultBuilder]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,841 INFO L854 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,842 INFO L854 garLoopResultBuilder]: At program point L48-3(lines 48 72) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,842 INFO L858 garLoopResultBuilder]: For program point L49(lines 49 53) no Hoare annotation was computed. [2022-02-23 20:47:35,842 INFO L858 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-02-23 20:47:35,842 INFO L854 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,842 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,842 INFO L858 garLoopResultBuilder]: For program point L54(lines 54 68) no Hoare annotation was computed. [2022-02-23 20:47:35,842 INFO L854 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,842 INFO L854 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,842 INFO L858 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2022-02-23 20:47:35,844 INFO L854 garLoopResultBuilder]: At program point L60-1(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,844 INFO L854 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,846 INFO L858 garLoopResultBuilder]: For program point L70(line 70) no Hoare annotation was computed. [2022-02-23 20:47:35,846 INFO L858 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2022-02-23 20:47:35,846 INFO L858 garLoopResultBuilder]: For program point L66(lines 66 68) no Hoare annotation was computed. [2022-02-23 20:47:35,846 INFO L858 garLoopResultBuilder]: For program point L59(lines 59 63) no Hoare annotation was computed. [2022-02-23 20:47:35,847 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,847 INFO L854 garLoopResultBuilder]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,847 INFO L854 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-02-23 20:47:35,847 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-02-23 20:47:35,847 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-02-23 20:47:35,847 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-02-23 20:47:35,847 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-02-23 20:47:35,847 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-02-23 20:47:35,847 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-02-23 20:47:35,849 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-23 20:47:35,850 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 20:47:35,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:47:35 BasicIcfg [2022-02-23 20:47:35,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 20:47:35,862 INFO L158 Benchmark]: Toolchain (without parser) took 2941.31ms. Allocated memory was 202.4MB in the beginning and 248.5MB in the end (delta: 46.1MB). Free memory was 151.1MB in the beginning and 104.3MB in the end (delta: 46.9MB). Peak memory consumption was 93.5MB. Max. memory is 8.0GB. [2022-02-23 20:47:35,862 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 202.4MB. Free memory was 167.4MB in the beginning and 167.3MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 20:47:35,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.52ms. Allocated memory is still 202.4MB. Free memory was 150.9MB in the beginning and 177.3MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 20:47:35,863 INFO L158 Benchmark]: Boogie Preprocessor took 23.56ms. Allocated memory is still 202.4MB. Free memory was 177.3MB in the beginning and 175.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 20:47:35,863 INFO L158 Benchmark]: RCFGBuilder took 237.96ms. Allocated memory is still 202.4MB. Free memory was 175.8MB in the beginning and 163.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 20:47:35,863 INFO L158 Benchmark]: IcfgTransformer took 29.51ms. Allocated memory is still 202.4MB. Free memory was 163.7MB in the beginning and 162.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 20:47:35,863 INFO L158 Benchmark]: TraceAbstraction took 2415.22ms. Allocated memory was 202.4MB in the beginning and 248.5MB in the end (delta: 46.1MB). Free memory was 161.6MB in the beginning and 104.3MB in the end (delta: 57.3MB). Peak memory consumption was 104.5MB. Max. memory is 8.0GB. [2022-02-23 20:47:35,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 202.4MB. Free memory was 167.4MB in the beginning and 167.3MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.52ms. Allocated memory is still 202.4MB. Free memory was 150.9MB in the beginning and 177.3MB in the end (delta: -26.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.56ms. Allocated memory is still 202.4MB. Free memory was 177.3MB in the beginning and 175.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 237.96ms. Allocated memory is still 202.4MB. Free memory was 175.8MB in the beginning and 163.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 29.51ms. Allocated memory is still 202.4MB. Free memory was 163.7MB in the beginning and 162.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2415.22ms. Allocated memory was 202.4MB in the beginning and 248.5MB in the end (delta: 46.1MB). Free memory was 161.6MB in the beginning and 104.3MB in the end (delta: 57.3MB). Peak memory consumption was 104.5MB. 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, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 330 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 305 mSDsluCounter, 290 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 91 mSDsCounter, 348 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 897 IncrementalHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 348 mSolverCounterUnsat, 199 mSDtfsCounter, 897 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 69 PreInvPairs, 105 NumberOfFragments, 161 HoareAnnotationTreeSize, 69 FomulaSimplifications, 165 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 445 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 544 SizeOfPredicates, 1 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 60/67 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: 32]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: (1 <= tagbuf_len && t <= tagbuf_len) && 0 <= t RESULT: Ultimate proved your program to be correct! [2022-02-23 20:47:35,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...