/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-05ce600 [2022-02-23 16:04:03,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:04:03,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:04:03,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 16:04:03,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:04:03,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:04:03,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:04:03,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:04:03,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:04:03,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:04:03,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:04:03,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:04:03,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:04:03,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:04:03,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:04:03,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:04:03,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:04:03,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:04:03,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:04:03,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:04:03,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:04:03,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:04:03,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:04:03,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:04:03,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:04:03,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:04:03,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:04:03,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:04:03,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:04:03,817 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:04:03,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:04:03,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:04:03,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:04:03,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:04:03,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:04:03,999 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:04:04,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-02-23 16:04:04,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7893b9b1d/ce6da429c593400a92d047bc049d4d9d/FLAGb676a7388 [2022-02-23 16:04:04,427 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:04:04,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-02-23 16:04:04,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7893b9b1d/ce6da429c593400a92d047bc049d4d9d/FLAGb676a7388 [2022-02-23 16:04:04,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7893b9b1d/ce6da429c593400a92d047bc049d4d9d [2022-02-23 16:04:04,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:04:04,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:04:04,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:04:04,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:04:04,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:04:04,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d027503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04, skipping insertion in model container [2022-02-23 16:04:04,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:04:04,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:04:04,612 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] [2022-02-23 16:04:04,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:04:04,644 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:04:04,653 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] [2022-02-23 16:04:04,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:04:04,677 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:04:04,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04 WrapperNode [2022-02-23 16:04:04,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:04:04,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:04:04,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:04:04,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:04:04,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:04:04,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:04:04,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:04:04,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:04:04,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:04:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:04:04,735 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 16:04:04,749 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 16:04:04,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:04:04,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:04:04,766 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:04:04,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:04:04,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:04:04,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:04:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:04:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:04:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 16:04:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 16:04:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:04:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:04:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:04:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:04:04,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:04:04,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:04:04,832 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:04:04,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:04:04,941 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:04:04,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:04:04,944 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 16:04:04,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:04:04 BoogieIcfgContainer [2022-02-23 16:04:04,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:04:04,946 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:04:04,946 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:04:04,947 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:04:04,949 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:04:04" (1/1) ... [2022-02-23 16:04:04,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:04:04 BasicIcfg [2022-02-23 16:04:04,960 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:04:04,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:04:04,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:04:04,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:04:04,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:04:04" (1/4) ... [2022-02-23 16:04:04,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5591b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:04:04, skipping insertion in model container [2022-02-23 16:04:04,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:04:04" (2/4) ... [2022-02-23 16:04:04,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5591b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:04:04, skipping insertion in model container [2022-02-23 16:04:04,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:04:04" (3/4) ... [2022-02-23 16:04:04,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5591b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:04:04, skipping insertion in model container [2022-02-23 16:04:04,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:04:04" (4/4) ... [2022-02-23 16:04:04,964 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.iJordan [2022-02-23 16:04:04,967 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:04:04,967 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:04:04,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:04:05,000 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 [2022-02-23 16:04:05,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:04:05,014 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) [2022-02-23 16:04:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 16:04:05,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:04:05,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:04:05,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:04:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:04:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1231819666, now seen corresponding path program 1 times [2022-02-23 16:04:05,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:04:05,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802488129] [2022-02-23 16:04:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:04:05,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:04:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:04:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,204 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 16:04:05,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:04:05,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802488129] [2022-02-23 16:04:05,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802488129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:04:05,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:04:05,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 16:04:05,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204044681] [2022-02-23 16:04:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:04:05,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 16:04:05,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:04:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 16:04:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 16:04:05,227 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) [2022-02-23 16:04:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:04:05,402 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-02-23 16:04:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 16:04:05,405 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 [2022-02-23 16:04:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:04:05,409 INFO L225 Difference]: With dead ends: 37 [2022-02-23 16:04:05,409 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 16:04:05,411 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 [2022-02-23 16:04:05,414 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 [2022-02-23 16:04:05,416 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] [2022-02-23 16:04:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 16:04:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-23 16:04:05,438 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) [2022-02-23 16:04:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-23 16:04:05,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2022-02-23 16:04:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:04:05,441 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-23 16:04:05,441 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) [2022-02-23 16:04:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-23 16:04:05,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 16:04:05,442 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:04:05,442 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] [2022-02-23 16:04:05,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:04:05,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:04:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:04:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1598286936, now seen corresponding path program 1 times [2022-02-23 16:04:05,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:04:05,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058268026] [2022-02-23 16:04:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:04:05,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:04:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:04:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:04:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,546 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 16:04:05,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:04:05,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058268026] [2022-02-23 16:04:05,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058268026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:04:05,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:04:05,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 16:04:05,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368623024] [2022-02-23 16:04:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:04:05,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 16:04:05,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:04:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 16:04:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 16:04:05,548 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) [2022-02-23 16:04:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:04:05,686 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-02-23 16:04:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 16:04:05,686 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 [2022-02-23 16:04:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:04:05,687 INFO L225 Difference]: With dead ends: 37 [2022-02-23 16:04:05,687 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 16:04:05,688 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 [2022-02-23 16:04:05,689 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 [2022-02-23 16:04:05,689 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] [2022-02-23 16:04:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 16:04:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-02-23 16:04:05,694 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) [2022-02-23 16:04:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-02-23 16:04:05,694 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2022-02-23 16:04:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:04:05,695 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-02-23 16:04:05,695 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) [2022-02-23 16:04:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-02-23 16:04:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 16:04:05,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:04:05,696 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] [2022-02-23 16:04:05,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:04:05,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:04:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:04:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1081273981, now seen corresponding path program 1 times [2022-02-23 16:04:05,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:04:05,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649041858] [2022-02-23 16:04:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:04:05,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:04:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:04:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:04:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-23 16:04:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-23 16:04:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,849 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 16:04:05,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:04:05,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649041858] [2022-02-23 16:04:05,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649041858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:04:05,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400735207] [2022-02-23 16:04:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:04:05,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:04:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:04:05,860 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 16:04:05,861 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 16:04:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 16:04:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:04:06,100 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 16:04:06,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:04:06,296 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 16:04:06,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400735207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:04:06,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:04:06,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-23 16:04:06,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191125188] [2022-02-23 16:04:06,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:04:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 16:04:06,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:04:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 16:04:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-23 16:04:06,299 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) [2022-02-23 16:04:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:04:06,591 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-02-23 16:04:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 16:04:06,592 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 [2022-02-23 16:04:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:04:06,593 INFO L225 Difference]: With dead ends: 51 [2022-02-23 16:04:06,593 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 16:04:06,593 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 [2022-02-23 16:04:06,594 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:04:06,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 65 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:04:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 16:04:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 16:04:06,598 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) [2022-02-23 16:04:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-02-23 16:04:06,599 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2022-02-23 16:04:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:04:06,599 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-02-23 16:04:06,599 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) [2022-02-23 16:04:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-02-23 16:04:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-23 16:04:06,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:04:06,601 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] [2022-02-23 16:04:06,620 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 16:04:06,801 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 [2022-02-23 16:04:06,802 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:04:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:04:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash 59588189, now seen corresponding path program 2 times [2022-02-23 16:04:06,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:04:06,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982102271] [2022-02-23 16:04:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:04:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:04:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:04:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 16:04:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-23 16:04:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-23 16:04:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 16:04:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-23 16:04:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-23 16:04:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-23 16:04:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:04:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-02-23 16:04:06,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:04:06,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982102271] [2022-02-23 16:04:06,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982102271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:04:06,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851703533] [2022-02-23 16:04:06,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:04:06,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:04:06,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:04:06,952 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) [2022-02-23 16:04:06,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:04:06,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:04:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:04:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 16:04:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:04:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:04:07,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:04:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 16:04:07,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851703533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:04:07,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:04:07,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 28 [2022-02-23 16:04:07,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973046647] [2022-02-23 16:04:07,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:04:07,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 16:04:07,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:04:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 16:04:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-02-23 16:04:07,480 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) [2022-02-23 16:04:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:04:07,862 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-02-23 16:04:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 16:04:07,863 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 [2022-02-23 16:04:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:04:07,863 INFO L225 Difference]: With dead ends: 54 [2022-02-23 16:04:07,863 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 16:04:07,865 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 [2022-02-23 16:04:07,866 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-23 16:04:07,866 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] [2022-02-23 16:04:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 16:04:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 16:04:07,867 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 16:04:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 16:04:07,867 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2022-02-23 16:04:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:04:07,867 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 16:04:07,867 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) [2022-02-23 16:04:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 16:04:07,867 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 16:04:07,870 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 16:04:07,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:04:08,083 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 [2022-02-23 16:04:08,086 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-02-23 16:04:08,087 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 16:04:08,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:04:08 BasicIcfg [2022-02-23 16:04:08,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 16:04:08,089 INFO L158 Benchmark]: Toolchain (without parser) took 3638.90ms. Allocated memory was 194.0MB in the beginning and 260.0MB in the end (delta: 66.1MB). Free memory was 145.0MB in the beginning and 106.1MB in the end (delta: 38.9MB). Peak memory consumption was 105.6MB. Max. memory is 8.0GB. [2022-02-23 16:04:08,089 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 194.0MB. Free memory was 161.5MB in the beginning and 161.3MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 16:04:08,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.54ms. Allocated memory is still 194.0MB. Free memory was 144.7MB in the beginning and 171.4MB in the end (delta: -26.8MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-02-23 16:04:08,090 INFO L158 Benchmark]: Boogie Preprocessor took 32.95ms. Allocated memory is still 194.0MB. Free memory was 171.4MB in the beginning and 169.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 16:04:08,090 INFO L158 Benchmark]: RCFGBuilder took 233.49ms. Allocated memory is still 194.0MB. Free memory was 169.9MB in the beginning and 158.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 16:04:08,090 INFO L158 Benchmark]: IcfgTransformer took 13.92ms. Allocated memory is still 194.0MB. Free memory was 158.3MB in the beginning and 157.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 16:04:08,090 INFO L158 Benchmark]: TraceAbstraction took 3127.66ms. Allocated memory was 194.0MB in the beginning and 260.0MB in the end (delta: 66.1MB). Free memory was 156.8MB in the beginning and 106.1MB in the end (delta: 50.7MB). Peak memory consumption was 117.8MB. Max. memory is 8.0GB. [2022-02-23 16:04:08,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 194.0MB. Free memory was 161.5MB in the beginning and 161.3MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.54ms. Allocated memory is still 194.0MB. Free memory was 144.7MB in the beginning and 171.4MB in the end (delta: -26.8MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.95ms. Allocated memory is still 194.0MB. Free memory was 171.4MB in the beginning and 169.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 233.49ms. Allocated memory is still 194.0MB. Free memory was 169.9MB in the beginning and 158.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.92ms. Allocated memory is still 194.0MB. Free memory was 158.3MB in the beginning and 157.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3127.66ms. Allocated memory was 194.0MB in the beginning and 260.0MB in the end (delta: 66.1MB). Free memory was 156.8MB in the beginning and 106.1MB in the end (delta: 50.7MB). Peak memory consumption was 117.8MB. 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: 3.1s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, 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, 1.3s 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! [2022-02-23 16:04:08,113 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...