/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:03:48,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:03:48,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:03:48,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:03:48,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:03:48,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:03:48,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:03:48,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:03:48,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:03:48,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:03:48,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:03:48,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:03:48,360 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:03:48,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:03:48,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:03:48,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:03:48,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:03:48,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:03:48,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:03:48,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:03:48,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:03:48,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:03:48,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:03:48,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:03:48,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:03:48,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:03:48,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:03:48,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:03:48,394 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:03:48,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:03:48,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:03:48,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:03:48,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:03:48,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:03:48,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:03:48,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:03:48,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:03:48,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:03:48,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:03:48,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:03:48,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:03:48,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:03:48,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:03:48,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:03:48,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:03:48,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:03:48,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:03:48,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:03:48,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:03:48,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:03:48,398 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:03:48,398 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:03:48,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:03:48,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:03:48,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:03:48,622 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:03:48,624 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:03:48,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-04-05 05:03:48,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16321d749/c4e1d8f68e944c57ad9c3d550cd0455a/FLAGbbe380f12 [2022-04-05 05:03:49,069 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:03:49,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-04-05 05:03:49,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16321d749/c4e1d8f68e944c57ad9c3d550cd0455a/FLAGbbe380f12 [2022-04-05 05:03:49,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16321d749/c4e1d8f68e944c57ad9c3d550cd0455a [2022-04-05 05:03:49,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:03:49,099 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:03:49,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:03:49,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:03:49,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:03:49,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6baa9e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49, skipping insertion in model container [2022-04-05 05:03:49,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:03:49,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:03:49,267 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-acceleration/array_3-1.i[849,862] [2022-04-05 05:03:49,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:03:49,284 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:03:49,293 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-acceleration/array_3-1.i[849,862] [2022-04-05 05:03:49,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:03:49,307 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:03:49,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49 WrapperNode [2022-04-05 05:03:49,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:03:49,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:03:49,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:03:49,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:03:49,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:03:49,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:03:49,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:03:49,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:03:49,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:03:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:03:49,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:03:49,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:03:49,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:03:49,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:03:49,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:03:49,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:03:49,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:03:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:03:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:03:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 05:03:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 05:03:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:03:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:03:49,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:03:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:03:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:03:49,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:03:49,451 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:03:49,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:03:49,562 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:03:49,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:03:49,567 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 05:03:49,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:03:49 BoogieIcfgContainer [2022-04-05 05:03:49,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:03:49,570 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:03:49,570 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:03:49,571 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:03:49,574 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:03:49" (1/1) ... [2022-04-05 05:03:49,576 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:03:49,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:03:49 BasicIcfg [2022-04-05 05:03:49,588 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:03:49,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:03:49,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:03:49,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:03:49,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:03:49" (1/4) ... [2022-04-05 05:03:49,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e151af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:03:49, skipping insertion in model container [2022-04-05 05:03:49,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:03:49" (2/4) ... [2022-04-05 05:03:49,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e151af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:03:49, skipping insertion in model container [2022-04-05 05:03:49,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:03:49" (3/4) ... [2022-04-05 05:03:49,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e151af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:03:49, skipping insertion in model container [2022-04-05 05:03:49,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:03:49" (4/4) ... [2022-04-05 05:03:49,595 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.iqvasr [2022-04-05 05:03:49,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:03:49,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:03:49,671 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:03:49,675 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:03:49,676 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:03:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:03:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 05:03:49,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:03:49,698 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:03:49,699 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:03:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:03:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 261736565, now seen corresponding path program 1 times [2022-04-05 05:03:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:03:49,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444671309] [2022-04-05 05:03:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:49,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:03:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:03:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:03:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:03:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444671309] [2022-04-05 05:03:49,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444671309] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:03:49,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:03:49,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:03:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069343142] [2022-04-05 05:03:49,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:03:49,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:03:49,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:03:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:03:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:03:49,894 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:03:49,944 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-05 05:03:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:03:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-05 05:03:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:03:49,951 INFO L225 Difference]: With dead ends: 42 [2022-04-05 05:03:49,951 INFO L226 Difference]: Without dead ends: 18 [2022-04-05 05:03:49,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:03:49,957 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:03:49,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:03:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-05 05:03:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-05 05:03:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-05 05:03:49,984 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-04-05 05:03:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:03:49,985 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-05 05:03:49,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-05 05:03:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:03:49,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:03:49,986 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:03:49,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:03:49,987 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:03:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:03:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1236111046, now seen corresponding path program 1 times [2022-04-05 05:03:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:03:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307789161] [2022-04-05 05:03:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:03:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:03:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:03:50,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:03:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307789161] [2022-04-05 05:03:50,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307789161] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:03:50,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:03:50,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:03:50,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871847428] [2022-04-05 05:03:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:03:50,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:03:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:03:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:03:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:03:50,062 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:03:50,113 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-05 05:03:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:03:50,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-05 05:03:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:03:50,116 INFO L225 Difference]: With dead ends: 35 [2022-04-05 05:03:50,116 INFO L226 Difference]: Without dead ends: 25 [2022-04-05 05:03:50,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:03:50,118 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:03:50,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:03:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-05 05:03:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-04-05 05:03:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-05 05:03:50,129 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-04-05 05:03:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:03:50,129 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-05 05:03:50,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-05 05:03:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-05 05:03:50,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:03:50,130 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:03:50,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:03:50,131 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:03:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:03:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1563816184, now seen corresponding path program 1 times [2022-04-05 05:03:50,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:03:50,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431781677] [2022-04-05 05:03:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:03:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:03:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:03:50,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:03:50,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431781677] [2022-04-05 05:03:50,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431781677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:03:50,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443798402] [2022-04-05 05:03:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:50,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:03:50,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:03:50,215 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) [2022-04-05 05:03:50,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:03:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 05:03:50,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:03:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:03:50,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:03:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:03:50,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443798402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:03:50,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:03:50,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 05:03:50,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082462363] [2022-04-05 05:03:50,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:03:50,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:03:50,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:03:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:03:50,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:03:50,418 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:03:50,509 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-04-05 05:03:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:03:50,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-05 05:03:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:03:50,510 INFO L225 Difference]: With dead ends: 52 [2022-04-05 05:03:50,511 INFO L226 Difference]: Without dead ends: 39 [2022-04-05 05:03:50,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:03:50,512 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:03:50,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:03:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-05 05:03:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-04-05 05:03:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-04-05 05:03:50,520 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2022-04-05 05:03:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:03:50,521 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-04-05 05:03:50,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-05 05:03:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 05:03:50,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:03:50,522 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:03:50,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:03:50,741 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 [2022-04-05 05:03:50,742 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:03:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:03:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1985862862, now seen corresponding path program 2 times [2022-04-05 05:03:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:03:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166899649] [2022-04-05 05:03:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:03:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:03:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:03:50,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:03:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166899649] [2022-04-05 05:03:50,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166899649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:03:50,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:03:50,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 05:03:50,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986182548] [2022-04-05 05:03:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:03:50,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 05:03:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:03:50,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 05:03:50,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 05:03:50,873 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:03:50,947 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-04-05 05:03:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:03:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 22 [2022-04-05 05:03:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:03:50,950 INFO L225 Difference]: With dead ends: 41 [2022-04-05 05:03:50,950 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 05:03:50,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:03:50,959 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:03:50,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:03:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 05:03:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-05 05:03:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-05 05:03:50,972 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-04-05 05:03:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:03:50,973 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-05 05:03:50,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-05 05:03:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 05:03:50,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:03:50,974 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:03:50,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 05:03:50,974 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:03:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:03:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1390832492, now seen corresponding path program 1 times [2022-04-05 05:03:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:03:50,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695259030] [2022-04-05 05:03:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:50,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:03:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:51,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:03:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:03:51,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:03:51,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695259030] [2022-04-05 05:03:51,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695259030] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:03:51,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008721021] [2022-04-05 05:03:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:03:51,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:03:51,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:03:51,073 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) [2022-04-05 05:03:51,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:03:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:03:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 05:03:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:03:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:03:51,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:03:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:03:51,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008721021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:03:51,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:03:51,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-04-05 05:03:51,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980463975] [2022-04-05 05:03:51,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:03:51,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 05:03:51,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:03:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 05:03:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:03:51,353 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:03:51,676 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-04-05 05:03:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 05:03:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-05 05:03:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:03:51,677 INFO L225 Difference]: With dead ends: 99 [2022-04-05 05:03:51,677 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 05:03:51,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-04-05 05:03:51,680 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:03:51,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 43 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:03:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 05:03:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 05:03:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 05:03:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 05:03:51,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-04-05 05:03:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:03:51,682 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 05:03:51,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:03:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 05:03:51,683 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 05:03:51,687 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 05:03:51,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:03:51,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:03:51,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 05:03:51,998 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 05:03:51,998 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 05:03:51,998 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 05:03:51,998 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 05:03:51,998 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 05:03:51,998 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 05:03:51,998 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 05:03:51,999 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2022-04-05 05:03:51,999 INFO L885 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2022-04-05 05:03:51,999 INFO L882 garLoopResultBuilder]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2022-04-05 05:03:51,999 INFO L882 garLoopResultBuilder]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2022-04-05 05:03:51,999 INFO L878 garLoopResultBuilder]: At program point L28-4(lines 28 32) the Hoare annotation is: (< main_~i~0 1024) [2022-04-05 05:03:52,000 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2022-04-05 05:03:52,000 INFO L878 garLoopResultBuilder]: At program point L28-5(lines 28 32) the Hoare annotation is: (< main_~i~0 1024) [2022-04-05 05:03:52,000 INFO L882 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2022-04-05 05:03:52,000 INFO L882 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-04-05 05:03:52,000 INFO L882 garLoopResultBuilder]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2022-04-05 05:03:52,000 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2022-04-05 05:03:52,000 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2022-04-05 05:03:52,000 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-04-05 05:03:52,001 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2022-04-05 05:03:52,002 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-04-05 05:03:52,002 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2022-04-05 05:03:52,002 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-04-05 05:03:52,002 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2022-04-05 05:03:52,007 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-04-05 05:03:52,008 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 05:03:52,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:03:52 BasicIcfg [2022-04-05 05:03:52,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 05:03:52,021 INFO L158 Benchmark]: Toolchain (without parser) took 2922.28ms. Allocated memory was 178.3MB in the beginning and 239.1MB in the end (delta: 60.8MB). Free memory was 119.4MB in the beginning and 187.3MB in the end (delta: -67.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 05:03:52,021 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 178.3MB. Free memory was 135.6MB in the beginning and 135.5MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 05:03:52,022 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.48ms. Allocated memory was 178.3MB in the beginning and 239.1MB in the end (delta: 60.8MB). Free memory was 119.2MB in the beginning and 211.9MB in the end (delta: -92.7MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-04-05 05:03:52,022 INFO L158 Benchmark]: Boogie Preprocessor took 23.23ms. Allocated memory is still 239.1MB. Free memory was 211.9MB in the beginning and 210.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 05:03:52,022 INFO L158 Benchmark]: RCFGBuilder took 236.19ms. Allocated memory is still 239.1MB. Free memory was 210.3MB in the beginning and 199.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 05:03:52,023 INFO L158 Benchmark]: IcfgTransformer took 18.35ms. Allocated memory is still 239.1MB. Free memory was 199.3MB in the beginning and 198.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 05:03:52,023 INFO L158 Benchmark]: TraceAbstraction took 2430.61ms. Allocated memory is still 239.1MB. Free memory was 197.7MB in the beginning and 187.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-04-05 05:03:52,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 178.3MB. Free memory was 135.6MB in the beginning and 135.5MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.48ms. Allocated memory was 178.3MB in the beginning and 239.1MB in the end (delta: 60.8MB). Free memory was 119.2MB in the beginning and 211.9MB in the end (delta: -92.7MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.23ms. Allocated memory is still 239.1MB. Free memory was 211.9MB in the beginning and 210.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 236.19ms. Allocated memory is still 239.1MB. Free memory was 210.3MB in the beginning and 199.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 18.35ms. Allocated memory is still 239.1MB. Free memory was 199.3MB in the beginning and 198.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2430.61ms. Allocated memory is still 239.1MB. Free memory was 197.7MB in the beginning and 187.3MB in the end (delta: 10.4MB). Peak memory consumption was 10.3MB. 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: 16]: 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, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 267 mSDsluCounter, 146 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 232 IncrementalHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 80 mSDtfsCounter, 232 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 21 PreInvPairs, 51 NumberOfFragments, 18 HoareAnnotationTreeSize, 21 FomulaSimplifications, 33 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 196 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 166 ConstructedInterpolants, 0 QuantifiedInterpolants, 284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 189 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 36/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i < 1024 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-04-05 05:03:52,065 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...