/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:24:58,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:24:58,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:24:58,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:24:58,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:24:58,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:24:58,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:24:58,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:24:58,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:24:58,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:24:58,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:24:58,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:24:58,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:24:58,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:24:58,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:24:58,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:24:58,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:24:58,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:24:58,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:24:58,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:24:58,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:24:58,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:24:58,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:24:58,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:24:58,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:24:58,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:24:58,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:24:58,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:24:58,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:24:58,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:24:58,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:24:58,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:24:58,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:24:58,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:24:58,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:24:58,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:24:58,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:24:58,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:24:58,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:24:58,861 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:24:58,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:24:58,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:24:58,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:24:58,864 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:24:58,864 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:24:59,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:24:59,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:24:59,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:24:59,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:24:59,067 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:24:59,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-01-31 12:24:59,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8494d3a73/38ccc328b913488d8be42e02680e2e07/FLAGbbe07e04e [2022-01-31 12:24:59,514 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:24:59,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-01-31 12:24:59,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8494d3a73/38ccc328b913488d8be42e02680e2e07/FLAGbbe07e04e [2022-01-31 12:24:59,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8494d3a73/38ccc328b913488d8be42e02680e2e07 [2022-01-31 12:24:59,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:24:59,548 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:24:59,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:24:59,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:24:59,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:24:59,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522e6f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59, skipping insertion in model container [2022-01-31 12:24:59,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:24:59,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:24:59,718 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/MADWiFi-encode_ie_ok.i[893,906] [2022-01-31 12:24:59,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:24:59,761 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:24:59,779 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/MADWiFi-encode_ie_ok.i[893,906] [2022-01-31 12:24:59,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:24:59,792 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:24:59,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59 WrapperNode [2022-01-31 12:24:59,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:24:59,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:24:59,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:24:59,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:24:59,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:24:59,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:24:59,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:24:59,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:24:59,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (1/1) ... [2022-01-31 12:24:59,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:24:59,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:24:59,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 12:24:59,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 12:24:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:24:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:24:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:24:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 12:24:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:24:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:24:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:24:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:24:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:24:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:24:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:24:59,935 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:24:59,936 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:25:00,072 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:25:00,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:25:00,077 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 12:25:00,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:25:00 BoogieIcfgContainer [2022-01-31 12:25:00,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:25:00,079 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:25:00,079 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:25:00,080 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:25:00,082 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:25:00" (1/1) ... [2022-01-31 12:25:00,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:25:00 BasicIcfg [2022-01-31 12:25:00,096 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:25:00,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:25:00,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:25:00,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:25:00,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:24:59" (1/4) ... [2022-01-31 12:25:00,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0cb67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:25:00, skipping insertion in model container [2022-01-31 12:25:00,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:24:59" (2/4) ... [2022-01-31 12:25:00,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0cb67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:25:00, skipping insertion in model container [2022-01-31 12:25:00,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:25:00" (3/4) ... [2022-01-31 12:25:00,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0cb67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:25:00, skipping insertion in model container [2022-01-31 12:25:00,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:25:00" (4/4) ... [2022-01-31 12:25:00,102 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.iJordan [2022-01-31 12:25:00,105 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:25:00,106 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:25:00,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:25:00,141 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 12:25:00,142 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:25:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 12:25:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 12:25:00,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:25:00,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:25:00,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:25:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:25:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1231819666, now seen corresponding path program 1 times [2022-01-31 12:25:00,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:25:00,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371998341] [2022-01-31 12:25:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:25:00,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:25:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:00,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:25:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:25:00,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:25:00,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371998341] [2022-01-31 12:25:00,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371998341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:25:00,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:25:00,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 12:25:00,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546255592] [2022-01-31 12:25:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:25:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 12:25:00,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:25:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 12:25:00,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 12:25:00,476 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-01-31 12:25:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:25:00,649 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-01-31 12:25:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 12:25:00,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2022-01-31 12:25:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:25:00,656 INFO L225 Difference]: With dead ends: 37 [2022-01-31 12:25:00,656 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 12:25:00,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 12:25:00,660 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:25:00,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:25:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 12:25:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 12:25:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:25:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-01-31 12:25:00,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2022-01-31 12:25:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:25:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-01-31 12:25:00,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-01-31 12:25:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-01-31 12:25:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 12:25:00,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:25:00,685 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:25:00,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:25:00,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:25:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:25:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1598286936, now seen corresponding path program 1 times [2022-01-31 12:25:00,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:25:00,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636111868] [2022-01-31 12:25:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:25:00,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:25:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:00,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:25:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:00,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:25:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:25:00,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:25:00,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636111868] [2022-01-31 12:25:00,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636111868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:25:00,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:25:00,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 12:25:00,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231246134] [2022-01-31 12:25:00,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:25:00,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 12:25:00,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:25:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 12:25:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 12:25:00,806 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-01-31 12:25:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:25:00,914 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-31 12:25:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 12:25:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 24 [2022-01-31 12:25:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:25:00,916 INFO L225 Difference]: With dead ends: 37 [2022-01-31 12:25:00,917 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 12:25:00,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 12:25:00,918 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:25:00,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:25:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 12:25:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-31 12:25:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 12:25:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-31 12:25:00,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2022-01-31 12:25:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:25:00,925 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-31 12:25:00,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-01-31 12:25:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-31 12:25:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 12:25:00,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:25:00,926 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:25:00,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:25:00,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:25:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:25:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1081273981, now seen corresponding path program 1 times [2022-01-31 12:25:00,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:25:00,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824145733] [2022-01-31 12:25:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:25:00,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:25:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:25:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:01,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:25:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:01,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 12:25:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:01,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 12:25:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 12:25:01,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:25:01,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824145733] [2022-01-31 12:25:01,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824145733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:25:01,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059627244] [2022-01-31 12:25:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:25:01,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:25:01,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:25:01,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:25:01,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 12:25:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 12:25:01,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:25:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 12:25:01,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:25:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 12:25:01,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059627244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:25:01,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:25:01,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-31 12:25:01,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103183947] [2022-01-31 12:25:01,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:25:01,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 12:25:01,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:25:01,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 12:25:01,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-31 12:25:01,643 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 12:25:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:25:01,939 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 12:25:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 12:25:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2022-01-31 12:25:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:25:01,941 INFO L225 Difference]: With dead ends: 51 [2022-01-31 12:25:01,941 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 12:25:01,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-01-31 12:25:01,942 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:25:01,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 65 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:25:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 12:25:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 12:25:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 12:25:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 12:25:01,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2022-01-31 12:25:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:25:01,948 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 12:25:01,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 12:25:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 12:25:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 12:25:01,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:25:01,949 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:25:01,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 12:25:02,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:25:02,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:25:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:25:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash 59588189, now seen corresponding path program 2 times [2022-01-31 12:25:02,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:25:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206952112] [2022-01-31 12:25:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:25:02,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:25:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:25:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:25:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 12:25:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 12:25:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 12:25:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 12:25:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 12:25:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 12:25:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:25:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-31 12:25:02,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:25:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206952112] [2022-01-31 12:25:02,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206952112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:25:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116208639] [2022-01-31 12:25:02,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:25:02,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:25:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:25:02,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:25:02,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 12:25:02,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:25:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:25:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 12:25:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:25:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 12:25:02,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:25:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 12:25:02,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116208639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:25:02,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:25:02,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 28 [2022-01-31 12:25:02,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761839491] [2022-01-31 12:25:02,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:25:02,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 12:25:02,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:25:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 12:25:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-31 12:25:02,933 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-01-31 12:25:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:25:03,352 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-01-31 12:25:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 12:25:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 63 [2022-01-31 12:25:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:25:03,354 INFO L225 Difference]: With dead ends: 54 [2022-01-31 12:25:03,354 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 12:25:03,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 12:25:03,355 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:25:03,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:25:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 12:25:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 12:25:03,356 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) [2022-01-31 12:25:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 12:25:03,356 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2022-01-31 12:25:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:25:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 12:25:03,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-01-31 12:25:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 12:25:03,357 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 12:25:03,359 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 12:25:03,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 12:25:03,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 12:25:03,579 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-01-31 12:25:03,580 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 12:25:03,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:25:03 BasicIcfg [2022-01-31 12:25:03,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 12:25:03,583 INFO L158 Benchmark]: Toolchain (without parser) took 4034.56ms. Allocated memory was 191.9MB in the beginning and 302.0MB in the end (delta: 110.1MB). Free memory was 136.1MB in the beginning and 207.4MB in the end (delta: -71.3MB). Peak memory consumption was 39.4MB. Max. memory is 8.0GB. [2022-01-31 12:25:03,583 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 152.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:25:03,583 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.49ms. Allocated memory was 191.9MB in the beginning and 302.0MB in the end (delta: 110.1MB). Free memory was 135.9MB in the beginning and 273.9MB in the end (delta: -137.9MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-01-31 12:25:03,583 INFO L158 Benchmark]: Boogie Preprocessor took 21.29ms. Allocated memory is still 302.0MB. Free memory was 273.9MB in the beginning and 272.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:25:03,584 INFO L158 Benchmark]: RCFGBuilder took 263.40ms. Allocated memory is still 302.0MB. Free memory was 272.8MB in the beginning and 260.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 12:25:03,584 INFO L158 Benchmark]: IcfgTransformer took 16.85ms. Allocated memory is still 302.0MB. Free memory was 260.2MB in the beginning and 258.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 12:25:03,584 INFO L158 Benchmark]: TraceAbstraction took 3485.19ms. Allocated memory is still 302.0MB. Free memory was 258.1MB in the beginning and 207.4MB in the end (delta: 50.7MB). Peak memory consumption was 51.8MB. Max. memory is 8.0GB. [2022-01-31 12:25:03,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 191.9MB. Free memory is still 152.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.49ms. Allocated memory was 191.9MB in the beginning and 302.0MB in the end (delta: 110.1MB). Free memory was 135.9MB in the beginning and 273.9MB in the end (delta: -137.9MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.29ms. Allocated memory is still 302.0MB. Free memory was 273.9MB in the beginning and 272.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 263.40ms. Allocated memory is still 302.0MB. Free memory was 272.8MB in the beginning and 260.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 16.85ms. Allocated memory is still 302.0MB. Free memory was 260.2MB in the beginning and 258.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 3485.19ms. Allocated memory is still 302.0MB. Free memory was 258.1MB in the beginning and 207.4MB in the end (delta: 50.7MB). Peak memory consumption was 51.8MB. 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 158 mSDsluCounter, 246 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 143 mSDsCounter, 169 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 871 IncrementalHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 169 mSolverCounterUnsat, 103 mSDtfsCounter, 871 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 204 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=3, InterpolantAutomatonStates: 52, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 1211 SizeOfPredicates, 16 NumberOfNonLiveVariables, 262 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 357/431 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 RESULT: Ultimate proved your program to be correct! [2022-01-31 12:25:03,608 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...