/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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:29:28,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:29:28,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:29:28,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:29:28,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:29:28,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:29:28,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:29:28,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:29:28,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:29:28,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:29:28,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:29:28,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:29:28,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:29:28,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:29:28,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:29:28,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:29:28,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:29:28,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:29:28,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:29:28,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:29:28,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:29:28,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:29:28,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:29:28,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:29:28,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 20:29:28,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:29:28,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:29:28,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:29:28,440 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:29:28,454 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:29:28,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:29:28,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:29:28,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:29:28,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:29:28,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:29:28,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:29:28,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:29:28,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:29:28,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:29:28,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:29:28,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:29:28,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:29:28,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:29:28,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:29:28,458 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:29:28,459 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:29:28,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:29:28,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:29:28,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:29:28,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:29:28,676 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:29:28,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-02-23 20:29:28,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e603dfb4/a795068bffe4454ea7f6a6fda5dad0c3/FLAGb8d6104da [2022-02-23 20:29:29,058 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:29:29,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-02-23 20:29:29,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e603dfb4/a795068bffe4454ea7f6a6fda5dad0c3/FLAGb8d6104da [2022-02-23 20:29:29,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e603dfb4/a795068bffe4454ea7f6a6fda5dad0c3 [2022-02-23 20:29:29,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:29:29,512 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:29:29,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:29:29,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:29:29,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:29:29,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773f5e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29, skipping insertion in model container [2022-02-23 20:29:29,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:29:29,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:29:29,643 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2022-02-23 20:29:29,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:29:29,657 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:29:29,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2022-02-23 20:29:29,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:29:29,692 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:29:29,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29 WrapperNode [2022-02-23 20:29:29,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:29:29,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:29:29,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:29:29,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:29:29,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:29:29,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:29:29,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:29:29,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:29:29,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:29:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:29:29,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 20:29:29,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 20:29:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:29:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:29:29,772 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:29:29,772 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 20:29:29,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:29:29,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 20:29:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:29:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:29:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:29:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:29:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:29:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:29:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:29:29,819 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:29:29,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:29:29,919 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:29:29,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:29:29,923 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 20:29:29,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:29 BoogieIcfgContainer [2022-02-23 20:29:29,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:29:29,927 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:29:29,927 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:29:29,927 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:29:29,929 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:29" (1/1) ... [2022-02-23 20:29:29,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:29:29 BasicIcfg [2022-02-23 20:29:29,943 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:29:29,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:29:29,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:29:29,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:29:29,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:29:29" (1/4) ... [2022-02-23 20:29:29,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69238586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:29:29, skipping insertion in model container [2022-02-23 20:29:29,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:29:29" (2/4) ... [2022-02-23 20:29:29,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69238586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:29:29, skipping insertion in model container [2022-02-23 20:29:29,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:29:29" (3/4) ... [2022-02-23 20:29:29,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69238586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:29:29, skipping insertion in model container [2022-02-23 20:29:29,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:29:29" (4/4) ... [2022-02-23 20:29:29,948 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.cqvasr [2022-02-23 20:29:29,951 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:29:29,951 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:29:29,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:29:29,985 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:29:29,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:29:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 20:29:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:29:29,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:29,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:29,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:30,002 INFO L85 PathProgramCache]: Analyzing trace with hash -932305726, now seen corresponding path program 1 times [2022-02-23 20:29:30,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:30,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132617105] [2022-02-23 20:29:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:30,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:30,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:30,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132617105] [2022-02-23 20:29:30,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132617105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:30,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:30,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 20:29:30,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976619435] [2022-02-23 20:29:30,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:30,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 20:29:30,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 20:29:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:29:30,180 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:30,230 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-02-23 20:29:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 20:29:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-23 20:29:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:30,243 INFO L225 Difference]: With dead ends: 41 [2022-02-23 20:29:30,243 INFO L226 Difference]: Without dead ends: 20 [2022-02-23 20:29:30,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:29:30,249 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:30,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:29:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-23 20:29:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-23 20:29:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-02-23 20:29:30,290 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-02-23 20:29:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:30,291 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-02-23 20:29:30,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-02-23 20:29:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:29:30,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:30,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:30,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:29:30,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -931382205, now seen corresponding path program 1 times [2022-02-23 20:29:30,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:30,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165083092] [2022-02-23 20:29:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:30,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:30,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165083092] [2022-02-23 20:29:30,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165083092] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:30,377 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:30,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 20:29:30,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801496105] [2022-02-23 20:29:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:30,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 20:29:30,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:30,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 20:29:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 20:29:30,379 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:30,439 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-23 20:29:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 20:29:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-02-23 20:29:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:30,441 INFO L225 Difference]: With dead ends: 33 [2022-02-23 20:29:30,441 INFO L226 Difference]: Without dead ends: 26 [2022-02-23 20:29:30,441 INFO L932 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 [2022-02-23 20:29:30,442 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:29:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-23 20:29:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-02-23 20:29:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 20:29:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-23 20:29:30,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-02-23 20:29:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:30,449 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-23 20:29:30,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-23 20:29:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:29:30,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:30,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:30,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:29:30,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash -930428893, now seen corresponding path program 1 times [2022-02-23 20:29:30,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:30,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734649500] [2022-02-23 20:29:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:30,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:30,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:30,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734649500] [2022-02-23 20:29:30,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734649500] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:30,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:30,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 20:29:30,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929140555] [2022-02-23 20:29:30,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:30,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 20:29:30,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:30,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 20:29:30,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-23 20:29:30,520 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:30,629 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-02-23 20:29:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 20:29:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 12 [2022-02-23 20:29:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:30,630 INFO L225 Difference]: With dead ends: 30 [2022-02-23 20:29:30,630 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 20:29:30,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:29:30,632 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:30,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:29:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 20:29:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-02-23 20:29:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 20:29:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-02-23 20:29:30,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2022-02-23 20:29:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:30,637 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-02-23 20:29:30,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:29:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-02-23 20:29:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-23 20:29:30,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:30,638 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:30,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 20:29:30,638 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash 231391925, now seen corresponding path program 1 times [2022-02-23 20:29:30,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:30,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012987547] [2022-02-23 20:29:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:30,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:29:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-23 20:29:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:29:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:29:30,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:29:30,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012987547] [2022-02-23 20:29:30,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012987547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:29:30,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:29:30,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 20:29:30,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357717093] [2022-02-23 20:29:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:29:30,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 20:29:30,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:29:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 20:29:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:29:30,759 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:29:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:29:30,859 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-02-23 20:29:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 20:29:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-02-23 20:29:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:29:30,860 INFO L225 Difference]: With dead ends: 38 [2022-02-23 20:29:30,860 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 20:29:30,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:29:30,861 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:29:30,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:29:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 20:29:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-02-23 20:29:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 20:29:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-02-23 20:29:30,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2022-02-23 20:29:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:29:30,867 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-02-23 20:29:30,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 20:29:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-02-23 20:29:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 20:29:30,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:29:30,868 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:29:30,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 20:29:30,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:29:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:29:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1683544803, now seen corresponding path program 1 times [2022-02-23 20:29:30,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:29:30,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299355749] [2022-02-23 20:29:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:29:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:29:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 20:29:30,880 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 20:29:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 20:29:30,919 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 20:29:30,919 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 20:29:30,921 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 20:29:30,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 20:29:30,926 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-23 20:29:30,928 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 20:29:30,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:29:30 BasicIcfg [2022-02-23 20:29:30,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 20:29:30,944 INFO L158 Benchmark]: Toolchain (without parser) took 1431.57ms. Allocated memory was 173.0MB in the beginning and 239.1MB in the end (delta: 66.1MB). Free memory was 115.9MB in the beginning and 133.8MB in the end (delta: -18.0MB). Peak memory consumption was 46.8MB. Max. memory is 8.0GB. [2022-02-23 20:29:30,944 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 173.0MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 20:29:30,945 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.52ms. Allocated memory was 173.0MB in the beginning and 239.1MB in the end (delta: 66.1MB). Free memory was 115.6MB in the beginning and 213.5MB in the end (delta: -98.0MB). Peak memory consumption was 15.4MB. Max. memory is 8.0GB. [2022-02-23 20:29:30,945 INFO L158 Benchmark]: Boogie Preprocessor took 22.56ms. Allocated memory is still 239.1MB. Free memory was 213.5MB in the beginning and 212.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 20:29:30,945 INFO L158 Benchmark]: RCFGBuilder took 200.46ms. Allocated memory is still 239.1MB. Free memory was 212.0MB in the beginning and 200.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 20:29:30,946 INFO L158 Benchmark]: IcfgTransformer took 16.63ms. Allocated memory is still 239.1MB. Free memory was 200.9MB in the beginning and 199.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 20:29:30,946 INFO L158 Benchmark]: TraceAbstraction took 999.54ms. Allocated memory is still 239.1MB. Free memory was 199.4MB in the beginning and 133.8MB in the end (delta: 65.6MB). Peak memory consumption was 66.1MB. Max. memory is 8.0GB. [2022-02-23 20:29:30,948 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 173.0MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.52ms. Allocated memory was 173.0MB in the beginning and 239.1MB in the end (delta: 66.1MB). Free memory was 115.6MB in the beginning and 213.5MB in the end (delta: -98.0MB). Peak memory consumption was 15.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.56ms. Allocated memory is still 239.1MB. Free memory was 213.5MB in the beginning and 212.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 200.46ms. Allocated memory is still 239.1MB. Free memory was 212.0MB in the beginning and 200.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.63ms. Allocated memory is still 239.1MB. Free memory was 200.9MB in the beginning and 199.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 999.54ms. Allocated memory is still 239.1MB. Free memory was 199.4MB in the beginning and 133.8MB in the end (delta: 65.6MB). Peak memory consumption was 66.1MB. 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 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i