/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/diamond_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:17:35,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:17:35,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:17:35,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:17:35,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:17:35,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:17:35,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:17:35,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:17:35,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:17:35,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:17:35,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:17:35,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:17:35,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:17:35,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:17:35,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:17:35,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:17:35,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:17:35,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:17:35,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:17:35,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:17:35,937 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:17:35,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:17:35,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:17:35,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:17:35,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:17:35,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:17:35,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:17:35,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:17:35,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:17:35,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:17:35,971 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:17:35,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:17:35,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:17:35,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:17:35,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:17:35,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:17:35,973 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:17:35,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:17:35,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:17:35,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:17:35,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:17:35,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:17:35,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:17:35,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:17:35,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:17:35,976 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:17:35,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:17:36,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:17:36,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:17:36,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:17:36,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:17:36,143 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:17:36,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2022-03-20 08:17:36,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d639be3f/018dad2600bf47af85e6f0dce6018866/FLAGeb32ce545 [2022-03-20 08:17:36,522 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:17:36,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2022-03-20 08:17:36,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d639be3f/018dad2600bf47af85e6f0dce6018866/FLAGeb32ce545 [2022-03-20 08:17:36,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d639be3f/018dad2600bf47af85e6f0dce6018866 [2022-03-20 08:17:36,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:17:36,964 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:17:36,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:17:36,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:17:36,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:17:36,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742cefed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:36, skipping insertion in model container [2022-03-20 08:17:36,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:17:36" (1/1) ... [2022-03-20 08:17:36,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:17:36,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:17:37,109 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/diamond_2-2.c[373,386] [2022-03-20 08:17:37,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:17:37,132 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:17:37,140 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/diamond_2-2.c[373,386] [2022-03-20 08:17:37,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:17:37,154 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:17:37,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37 WrapperNode [2022-03-20 08:17:37,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:17:37,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:17:37,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:17:37,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:17:37,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:17:37,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:17:37,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:17:37,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:17:37,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:17:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:37,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:17:37,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:17:37,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:17:37,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:17:37,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:17:37,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:17:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:17:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:17:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:17:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:17:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:17:37,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:17:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:17:37,306 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:17:37,308 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:17:37,413 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:17:37,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:17:37,417 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:17:37,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:37 BoogieIcfgContainer [2022-03-20 08:17:37,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:17:37,419 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:17:37,419 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:17:37,420 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:17:37,422 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:37" (1/1) ... [2022-03-20 08:17:37,424 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:17:37,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:17:37 BasicIcfg [2022-03-20 08:17:37,435 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:17:37,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:17:37,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:17:37,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:17:37,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:17:36" (1/4) ... [2022-03-20 08:17:37,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e9e320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:17:37, skipping insertion in model container [2022-03-20 08:17:37,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:17:37" (2/4) ... [2022-03-20 08:17:37,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e9e320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:17:37, skipping insertion in model container [2022-03-20 08:17:37,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:17:37" (3/4) ... [2022-03-20 08:17:37,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e9e320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:17:37, skipping insertion in model container [2022-03-20 08:17:37,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:17:37" (4/4) ... [2022-03-20 08:17:37,447 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.cqvasr [2022-03-20 08:17:37,450 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:17:37,450 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:17:37,484 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:17:37,491 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 [2022-03-20 08:17:37,492 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:17:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-03-20 08:17:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:17:37,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:37,516 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:37,516 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -935980469, now seen corresponding path program 1 times [2022-03-20 08:17:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:37,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577739442] [2022-03-20 08:17:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:37,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577739442] [2022-03-20 08:17:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577739442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:37,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:37,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:17:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109926053] [2022-03-20 08:17:37,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:37,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:17:37,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:17:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:17:37,703 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:37,746 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-03-20 08:17:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:17:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-20 08:17:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:37,753 INFO L225 Difference]: With dead ends: 39 [2022-03-20 08:17:37,753 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 08:17:37,755 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 [2022-03-20 08:17:37,760 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 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 [2022-03-20 08:17:37,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 08:17:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-20 08:17:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-03-20 08:17:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-03-20 08:17:37,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 11 [2022-03-20 08:17:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:37,783 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-03-20 08:17:37,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-03-20 08:17:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:17:37,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:37,784 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:37,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:17:37,784 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash -935056948, now seen corresponding path program 1 times [2022-03-20 08:17:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945946466] [2022-03-20 08:17:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:37,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945946466] [2022-03-20 08:17:37,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945946466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:37,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:37,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864177714] [2022-03-20 08:17:37,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:37,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:37,853 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:37,893 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-03-20 08:17:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-20 08:17:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:37,895 INFO L225 Difference]: With dead ends: 29 [2022-03-20 08:17:37,895 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 08:17:37,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:17:37,897 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:37,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 08:17:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-20 08:17:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-03-20 08:17:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2022-03-20 08:17:37,901 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 11 [2022-03-20 08:17:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:37,901 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2022-03-20 08:17:37,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2022-03-20 08:17:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:17:37,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:37,902 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:37,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:17:37,903 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 982716702, now seen corresponding path program 1 times [2022-03-20 08:17:37,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:37,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178712258] [2022-03-20 08:17:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:38,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178712258] [2022-03-20 08:17:38,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178712258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748292832] [2022-03-20 08:17:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:38,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:38,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:38,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:17:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:17:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:38,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748292832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:38,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:38,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 08:17:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871686378] [2022-03-20 08:17:38,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:38,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:17:38,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:17:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:17:38,530 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-03-20 08:17:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:56,462 INFO L93 Difference]: Finished difference Result 341 states and 660 transitions. [2022-03-20 08:17:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 08:17:56,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 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 22 [2022-03-20 08:17:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:56,466 INFO L225 Difference]: With dead ends: 341 [2022-03-20 08:17:56,466 INFO L226 Difference]: Without dead ends: 336 [2022-03-20 08:17:56,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1529, Invalid=4021, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 08:17:56,468 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 237 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2777 mSolverCounterSat, 2071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 4848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2071 IncrementalHoareTripleChecker+Valid, 2777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:56,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 72 Invalid, 4848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2071 Valid, 2777 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 08:17:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-20 08:17:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 272. [2022-03-20 08:17:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.895131086142322) internal successors, (506), 267 states have internal predecessors, (506), 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) [2022-03-20 08:17:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 510 transitions. [2022-03-20 08:17:56,493 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 510 transitions. Word has length 22 [2022-03-20 08:17:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:56,493 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 510 transitions. [2022-03-20 08:17:56,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-03-20 08:17:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 510 transitions. [2022-03-20 08:17:56,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:17:56,495 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:56,495 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:56,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:56,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:56,696 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1831418748, now seen corresponding path program 1 times [2022-03-20 08:17:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794284957] [2022-03-20 08:17:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:56,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794284957] [2022-03-20 08:17:56,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794284957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:56,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:56,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777250626] [2022-03-20 08:17:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:56,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:56,735 INFO L87 Difference]: Start difference. First operand 272 states and 510 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:56,786 INFO L93 Difference]: Finished difference Result 386 states and 723 transitions. [2022-03-20 08:17:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 [2022-03-20 08:17:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:56,788 INFO L225 Difference]: With dead ends: 386 [2022-03-20 08:17:56,788 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 08:17:56,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:17:56,790 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:56,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 08:17:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 56. [2022-03-20 08:17:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 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) [2022-03-20 08:17:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-20 08:17:56,795 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 22 [2022-03-20 08:17:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:56,795 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-20 08:17:56,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-20 08:17:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:17:56,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:56,796 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:56,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 08:17:56,797 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash 649784287, now seen corresponding path program 1 times [2022-03-20 08:17:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:56,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805406883] [2022-03-20 08:17:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:56,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:56,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805406883] [2022-03-20 08:17:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805406883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:17:56,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:17:56,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:17:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985963004] [2022-03-20 08:17:56,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:17:56,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:17:56,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:17:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:17:56,840 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:56,879 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2022-03-20 08:17:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:17:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 [2022-03-20 08:17:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:56,880 INFO L225 Difference]: With dead ends: 83 [2022-03-20 08:17:56,881 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 08:17:56,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:17:56,881 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:56,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 31 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:17:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 08:17:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 08:17:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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) [2022-03-20 08:17:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-03-20 08:17:56,886 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 22 [2022-03-20 08:17:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:56,886 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-03-20 08:17:56,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-03-20 08:17:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:17:56,887 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:17:56,887 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:17:56,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 08:17:56,887 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:17:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:17:56,887 INFO L85 PathProgramCache]: Analyzing trace with hash 678413438, now seen corresponding path program 1 times [2022-03-20 08:17:56,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:17:56,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31037179] [2022-03-20 08:17:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:17:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:57,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:17:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:17:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31037179] [2022-03-20 08:17:57,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31037179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:17:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254784951] [2022-03-20 08:17:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:17:57,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:57,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:17:57,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:17:57,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:17:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:17:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 08:17:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:17:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:57,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:17:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:17:57,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254784951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:17:57,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:17:57,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6] total 16 [2022-03-20 08:17:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834046863] [2022-03-20 08:17:57,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:17:57,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 08:17:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:17:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 08:17:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:17:57,325 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:17:57,523 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-03-20 08:17:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 08:17:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 08:17:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:17:57,524 INFO L225 Difference]: With dead ends: 70 [2022-03-20 08:17:57,524 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:17:57,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-20 08:17:57,525 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:57,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:17:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:17:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:17:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 08:17:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:17:57,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2022-03-20 08:17:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:17:57,526 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:17:57,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:17:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:17:57,527 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:17:57,529 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:17:57,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 08:17:57,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 08:17:57,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:17:57,809 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|)) [2022-03-20 08:17:57,809 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:17:57,809 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:17:57,809 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:17:57,809 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:17:57,809 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:17:57,809 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:17:57,809 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 13 50) the Hoare annotation is: true [2022-03-20 08:17:57,809 INFO L878 garLoopResultBuilder]: At program point L45-1(lines 17 47) the Hoare annotation is: (let ((.cse0 (= (* (div main_~y~0 2) 2) main_~y~0))) (or (= main_~x~0 0) (and (= (+ 5 main_~x~0) 0) (not .cse0)) (and .cse0 (= (mod main_~x~0 2) (mod main_~y~0 2))))) [2022-03-20 08:17:57,809 INFO L878 garLoopResultBuilder]: At program point L17-2(lines 17 47) the Hoare annotation is: (let ((.cse0 (mod main_~y~0 2))) (or (and (<= 1 (mod (+ main_~x~0 1) 2)) (= (mod main_~x~0 2) .cse0)) (and (not (= .cse0 0)) (= main_~x~0 (- 5))))) [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 19) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 13 50) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 13 50) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point L21-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point L24-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point L27-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,810 INFO L882 garLoopResultBuilder]: For program point L30-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L33-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L36-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L39-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L42-1(lines 17 47) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2022-03-20 08:17:57,811 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2022-03-20 08:17:57,812 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2022-03-20 08:17:57,814 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-03-20 08:17:57,815 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:17:57,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:17:57 BasicIcfg [2022-03-20 08:17:57,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:17:57,827 INFO L158 Benchmark]: Toolchain (without parser) took 20861.67ms. Allocated memory was 183.5MB in the beginning and 225.4MB in the end (delta: 41.9MB). Free memory was 124.6MB in the beginning and 190.6MB in the end (delta: -66.0MB). Peak memory consumption was 98.9MB. Max. memory is 8.0GB. [2022-03-20 08:17:57,828 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:17:57,831 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.70ms. Allocated memory was 183.5MB in the beginning and 225.4MB in the end (delta: 41.9MB). Free memory was 124.5MB in the beginning and 195.6MB in the end (delta: -71.1MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. [2022-03-20 08:17:57,832 INFO L158 Benchmark]: Boogie Preprocessor took 26.12ms. Allocated memory is still 225.4MB. Free memory was 195.6MB in the beginning and 194.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:17:57,836 INFO L158 Benchmark]: RCFGBuilder took 235.75ms. Allocated memory is still 225.4MB. Free memory was 194.0MB in the beginning and 182.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 08:17:57,836 INFO L158 Benchmark]: IcfgTransformer took 15.72ms. Allocated memory is still 225.4MB. Free memory was 182.1MB in the beginning and 180.9MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:17:57,836 INFO L158 Benchmark]: TraceAbstraction took 20388.38ms. Allocated memory is still 225.4MB. Free memory was 180.4MB in the beginning and 190.6MB in the end (delta: -10.2MB). Peak memory consumption was 113.9MB. Max. memory is 8.0GB. [2022-03-20 08:17:57,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.70ms. Allocated memory was 183.5MB in the beginning and 225.4MB in the end (delta: 41.9MB). Free memory was 124.5MB in the beginning and 195.6MB in the end (delta: -71.1MB). Peak memory consumption was 5.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.12ms. Allocated memory is still 225.4MB. Free memory was 195.6MB in the beginning and 194.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 235.75ms. Allocated memory is still 225.4MB. Free memory was 194.0MB in the beginning and 182.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.72ms. Allocated memory is still 225.4MB. Free memory was 182.1MB in the beginning and 180.9MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 20388.38ms. Allocated memory is still 225.4MB. Free memory was 180.4MB in the beginning and 190.6MB in the end (delta: -10.2MB). Peak memory consumption was 113.9MB. 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: 8]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 380 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 379 mSDsluCounter, 250 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 118 mSDsCounter, 2158 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3130 IncrementalHoareTripleChecker+Invalid, 5288 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2158 mSolverCounterUnsat, 132 mSDtfsCounter, 3130 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=272occurred in iteration=3, InterpolantAutomatonStates: 79, 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, 6 MinimizatonAttempts, 130 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 21 NumberOfFragments, 70 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 289 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1029 SizeOfPredicates, 3 NumberOfNonLiveVariables, 178 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 2/8 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: 17]: Loop Invariant Derived loop invariant: (x == 0 || (5 + x == 0 && !(y / 2 * 2 == y))) || (y / 2 * 2 == y && x % 2 == y % 2) RESULT: Ultimate proved your program to be correct! [2022-03-20 08:17:57,857 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...