/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/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:13:12,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:13:12,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:13:12,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 17:13:12,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 17:13:12,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 17:13:12,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 17:13:12,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 17:13:12,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 17:13:12,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 17:13:12,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 17:13:12,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 17:13:12,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 17:13:12,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 17:13:12,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 17:13:12,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 17:13:12,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 17:13:12,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 17:13:12,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 17:13:12,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 17:13:12,670 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 17:13:12,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 17:13:12,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 17:13:12,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 17:13:12,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 17:13:12,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 17:13:12,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:13:12,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:13:12,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:13:12,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:13:12,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:13:12,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:13:12,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:13:12,695 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:13:12,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:13:12,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:13:12,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:13:12,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:13:12,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:13:12,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:13:12,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:13:12,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:13:12,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:13:12,697 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:13:12,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:13:12,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:13:12,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:13:12,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:13:12,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:13:12,874 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:13:12,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2022-03-18 17:13:12,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061bc1708/7e7c18329a9a45dc8fd4af7c8e6b683f/FLAGa40eb3252 [2022-03-18 17:13:13,281 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:13:13,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2022-03-18 17:13:13,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061bc1708/7e7c18329a9a45dc8fd4af7c8e6b683f/FLAGa40eb3252 [2022-03-18 17:13:13,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061bc1708/7e7c18329a9a45dc8fd4af7c8e6b683f [2022-03-18 17:13:13,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:13:13,304 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:13:13,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:13:13,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:13:13,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:13:13,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453589c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13, skipping insertion in model container [2022-03-18 17:13:13,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:13:13,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:13:13,466 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/NetBSD_loop.i[893,906] [2022-03-18 17:13:13,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:13:13,478 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:13:13,485 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/NetBSD_loop.i[893,906] [2022-03-18 17:13:13,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:13:13,495 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:13:13,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13 WrapperNode [2022-03-18 17:13:13,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:13:13,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:13:13,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:13:13,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:13:13,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:13:13,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:13:13,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:13:13,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:13:13,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:13:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:13:13,535 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) [2022-03-18 17:13:13,537 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 [2022-03-18 17:13:13,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:13:13,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:13:13,558 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:13:13,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 17:13:13,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:13:13,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:13:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:13:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:13:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 17:13:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 17:13:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:13:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:13:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 17:13:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:13:13,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 17:13:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:13:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:13:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:13:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:13:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:13:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:13:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:13:13,644 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:13:13,645 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:13:13,723 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:13:13,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:13:13,727 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 17:13:13,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:13:13 BoogieIcfgContainer [2022-03-18 17:13:13,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:13:13,729 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:13:13,729 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:13:13,730 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:13:13,732 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:13:13" (1/1) ... [2022-03-18 17:13:13,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:13:13 BasicIcfg [2022-03-18 17:13:13,742 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:13:13,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:13:13,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:13:13,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:13:13,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:13:13" (1/4) ... [2022-03-18 17:13:13,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a6b069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:13:13, skipping insertion in model container [2022-03-18 17:13:13,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:13:13" (2/4) ... [2022-03-18 17:13:13,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a6b069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:13:13, skipping insertion in model container [2022-03-18 17:13:13,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:13:13" (3/4) ... [2022-03-18 17:13:13,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a6b069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:13:13, skipping insertion in model container [2022-03-18 17:13:13,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:13:13" (4/4) ... [2022-03-18 17:13:13,747 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.iJordan [2022-03-18 17:13:13,750 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:13:13,750 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:13:13,800 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:13:13,805 INFO L340 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 [2022-03-18 17:13:13,805 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:13:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-03-18 17:13:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 17:13:13,818 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:13,818 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:13,819 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash -665154378, now seen corresponding path program 1 times [2022-03-18 17:13:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:13,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048543136] [2022-03-18 17:13:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:13:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048543136] [2022-03-18 17:13:14,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048543136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:14,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:14,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 17:13:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155613325] [2022-03-18 17:13:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:14,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 17:13:14,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 17:13:14,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 17:13:14,070 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:13:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:14,187 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-03-18 17:13:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:13:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 17:13:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:14,196 INFO L225 Difference]: With dead ends: 30 [2022-03-18 17:13:14,196 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 17:13:14,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:13:14,200 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:14,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 42 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 17:13:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-18 17:13:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-03-18 17:13:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-03-18 17:13:14,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2022-03-18 17:13:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:14,224 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-03-18 17:13:14,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:13:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-03-18 17:13:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 17:13:14,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:14,226 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:14,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:13:14,226 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1437979323, now seen corresponding path program 1 times [2022-03-18 17:13:14,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:14,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127177431] [2022-03-18 17:13:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 17:13:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:13:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127177431] [2022-03-18 17:13:14,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127177431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:13:14,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:13:14,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 17:13:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277905960] [2022-03-18 17:13:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:13:14,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 17:13:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 17:13:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 17:13:14,349 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-03-18 17:13:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:14,464 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-03-18 17:13:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:13:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 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 18 [2022-03-18 17:13:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:14,466 INFO L225 Difference]: With dead ends: 30 [2022-03-18 17:13:14,467 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 17:13:14,471 INFO L911 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 [2022-03-18 17:13:14,472 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:14,472 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 17:13:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-18 17:13:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 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) [2022-03-18 17:13:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-18 17:13:14,483 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2022-03-18 17:13:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:14,486 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-18 17:13:14,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-03-18 17:13:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-18 17:13:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 17:13:14,491 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:14,491 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:14,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:13:14,492 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1407888200, now seen corresponding path program 1 times [2022-03-18 17:13:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:14,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000978073] [2022-03-18 17:13:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 17:13:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 17:13:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 17:13:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 17:13:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000978073] [2022-03-18 17:13:14,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000978073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:13:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089796533] [2022-03-18 17:13:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:14,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:13:14,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:13:14,633 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) [2022-03-18 17:13:14,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:13:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 17:13:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:13:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 17:13:14,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:13:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 17:13:14,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089796533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:13:14,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:13:14,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-18 17:13:14,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171612082] [2022-03-18 17:13:14,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:13:14,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 17:13:14,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 17:13:14,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:13:14,980 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 17:13:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:15,106 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-03-18 17:13:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:13:15,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2022-03-18 17:13:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:15,109 INFO L225 Difference]: With dead ends: 38 [2022-03-18 17:13:15,109 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 17:13:15,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-03-18 17:13:15,111 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:15,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 42 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:13:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 17:13:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-18 17:13:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 17:13:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-18 17:13:15,121 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2022-03-18 17:13:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:15,122 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-18 17:13:15,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 17:13:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-18 17:13:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 17:13:15,123 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:13:15,124 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:13:15,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:13:15,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:13:15,340 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:13:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:13:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash -699974453, now seen corresponding path program 2 times [2022-03-18 17:13:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:13:15,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944203585] [2022-03-18 17:13:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:13:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:13:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:13:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 17:13:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 17:13:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 17:13:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 17:13:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 17:13:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:13:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 17:13:15,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:13:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944203585] [2022-03-18 17:13:15,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944203585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:13:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310001240] [2022-03-18 17:13:15,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:13:15,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:13:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:13:15,409 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) [2022-03-18 17:13:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:13:15,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:13:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:13:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 17:13:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:13:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 17:13:15,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:13:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 17:13:15,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310001240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:13:15,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:13:15,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-03-18 17:13:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561663925] [2022-03-18 17:13:15,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:13:15,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 17:13:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:13:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 17:13:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 17:13:15,659 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 17:13:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:13:15,717 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-03-18 17:13:15,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 17:13:15,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-03-18 17:13:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:13:15,718 INFO L225 Difference]: With dead ends: 35 [2022-03-18 17:13:15,721 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 17:13:15,721 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-18 17:13:15,724 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:13:15,725 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 41 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:13:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 17:13:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 17:13:15,725 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) [2022-03-18 17:13:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 17:13:15,726 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2022-03-18 17:13:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:13:15,726 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 17:13:15,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 17:13:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 17:13:15,726 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 17:13:15,728 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 17:13:15,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:13:15,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 17:13:15,946 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-03-18 17:13:15,947 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 17:13:15,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:13:15 BasicIcfg [2022-03-18 17:13:15,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 17:13:15,949 INFO L158 Benchmark]: Toolchain (without parser) took 2644.40ms. Allocated memory was 210.8MB in the beginning and 261.1MB in the end (delta: 50.3MB). Free memory was 161.0MB in the beginning and 163.2MB in the end (delta: -2.2MB). Peak memory consumption was 49.7MB. Max. memory is 8.0GB. [2022-03-18 17:13:15,949 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 210.8MB. Free memory was 177.3MB in the beginning and 177.2MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 17:13:15,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.25ms. Allocated memory is still 210.8MB. Free memory was 160.9MB in the beginning and 187.8MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 17:13:15,949 INFO L158 Benchmark]: Boogie Preprocessor took 15.77ms. Allocated memory is still 210.8MB. Free memory was 187.8MB in the beginning and 186.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 17:13:15,949 INFO L158 Benchmark]: RCFGBuilder took 216.41ms. Allocated memory is still 210.8MB. Free memory was 186.1MB in the beginning and 176.3MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 17:13:15,949 INFO L158 Benchmark]: IcfgTransformer took 13.24ms. Allocated memory is still 210.8MB. Free memory was 176.0MB in the beginning and 175.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 17:13:15,950 INFO L158 Benchmark]: TraceAbstraction took 2205.06ms. Allocated memory was 210.8MB in the beginning and 261.1MB in the end (delta: 50.3MB). Free memory was 174.6MB in the beginning and 163.2MB in the end (delta: 11.4MB). Peak memory consumption was 62.6MB. Max. memory is 8.0GB. [2022-03-18 17:13:15,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 210.8MB. Free memory was 177.3MB in the beginning and 177.2MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.25ms. Allocated memory is still 210.8MB. Free memory was 160.9MB in the beginning and 187.8MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.77ms. Allocated memory is still 210.8MB. Free memory was 187.8MB in the beginning and 186.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.41ms. Allocated memory is still 210.8MB. Free memory was 186.1MB in the beginning and 176.3MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 13.24ms. Allocated memory is still 210.8MB. Free memory was 176.0MB in the beginning and 175.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2205.06ms. Allocated memory was 210.8MB in the beginning and 261.1MB in the end (delta: 50.3MB). Free memory was 174.6MB in the beginning and 163.2MB in the end (delta: 11.4MB). Peak memory consumption was 62.6MB. 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, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 86 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 162 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 97 mSDsCounter, 65 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 296 IncrementalHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 65 mSolverCounterUnsat, 65 mSDtfsCounter, 296 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=3, InterpolantAutomatonStates: 32, 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, 0.9s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 239 ConstructedInterpolants, 0 QuantifiedInterpolants, 479 SizeOfPredicates, 9 NumberOfNonLiveVariables, 203 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 224/245 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! [2022-03-18 17:13:15,978 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...