/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:13:10,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:13:10,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:13:10,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:13:10,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:13:10,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:13:10,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:13:10,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:13:10,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:13:10,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:13:10,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:13:10,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:13:10,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:13:10,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:13:10,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:13:10,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:13:10,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:13:10,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:13:10,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:13:10,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:13:10,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:13:10,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:13:11,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:13:11,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:13:11,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:13:11,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:13:11,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:13:11,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:13:11,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:13:11,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:13:11,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:13:11,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:13:11,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:13:11,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:13:11,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:13:11,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:13:11,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:13:11,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:13:11,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:13:11,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:13:11,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:13:11,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:13:11,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:13:11,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:13:11,032 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:13:11,032 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:13:11,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:13:11,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:13:11,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:13:11,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:13:11,280 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:13:11,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2022-01-31 12:13:11,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89976af41/1f0b5084c8ad46d1b7e9f4197852af67/FLAGbfc6e8aa4 [2022-01-31 12:13:11,713 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:13:11,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2022-01-31 12:13:11,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89976af41/1f0b5084c8ad46d1b7e9f4197852af67/FLAGbfc6e8aa4 [2022-01-31 12:13:11,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89976af41/1f0b5084c8ad46d1b7e9f4197852af67 [2022-01-31 12:13:11,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:13:11,739 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:13:11,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:13:11,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:13:11,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:13:11,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:13:11" (1/1) ... [2022-01-31 12:13:11,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a5bb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:11, skipping insertion in model container [2022-01-31 12:13:11,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:13:11" (1/1) ... [2022-01-31 12:13:11,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:13:11,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:13:11,926 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/sum01-1.i[808,821] [2022-01-31 12:13:11,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:13:11,979 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:13:11,990 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/sum01-1.i[808,821] [2022-01-31 12:13:11,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:13:12,003 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:13:12,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12 WrapperNode [2022-01-31 12:13:12,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:13:12,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:13:12,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:13:12,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:13:12,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:13:12,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:13:12,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:13:12,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:13:12,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:13:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:13:12,080 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) [2022-01-31 12:13:12,101 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 [2022-01-31 12:13:12,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:13:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:13:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:13:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:13:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:13:12,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:13:12,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:13:12,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:13:12,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:13:12,121 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:13:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:13:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:13:12,174 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:13:12,176 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:13:12,259 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:13:12,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:13:12,264 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 12:13:12,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:13:12 BoogieIcfgContainer [2022-01-31 12:13:12,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:13:12,266 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:13:12,266 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:13:12,267 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:13:12,270 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:13:12" (1/1) ... [2022-01-31 12:13:12,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:13:12 BasicIcfg [2022-01-31 12:13:12,280 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:13:12,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:13:12,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:13:12,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:13:12,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:13:11" (1/4) ... [2022-01-31 12:13:12,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597c3ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:13:12, skipping insertion in model container [2022-01-31 12:13:12,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:13:12" (2/4) ... [2022-01-31 12:13:12,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597c3ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:13:12, skipping insertion in model container [2022-01-31 12:13:12,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:13:12" (3/4) ... [2022-01-31 12:13:12,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597c3ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:13:12, skipping insertion in model container [2022-01-31 12:13:12,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:13:12" (4/4) ... [2022-01-31 12:13:12,287 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.iJordan [2022-01-31 12:13:12,290 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:13:12,291 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:13:12,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:13:12,328 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 12:13:12,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:13:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-01-31 12:13:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 12:13:12,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:13:12,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:13:12,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:13:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:13:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2022-01-31 12:13:12,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:13:12,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141288219] [2022-01-31 12:13:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:12,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:13:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:13:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:12,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:13:12,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141288219] [2022-01-31 12:13:12,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141288219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:13:12,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:13:12,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 12:13:12,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735065946] [2022-01-31 12:13:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:13:12,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 12:13:12,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:13:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 12:13:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:13:12,624 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-01-31 12:13:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:13:12,662 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-01-31 12:13:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 12:13:12,664 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 [2022-01-31 12:13:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:13:12,669 INFO L225 Difference]: With dead ends: 20 [2022-01-31 12:13:12,669 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 12:13:12,684 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 [2022-01-31 12:13:12,687 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-01-31 12:13:12,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:13:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 12:13:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 12:13:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-01-31 12:13:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-31 12:13:12,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-01-31 12:13:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:13:12,713 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-31 12:13:12,713 INFO L471 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) [2022-01-31 12:13:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-31 12:13:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 12:13:12,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:13:12,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:13:12,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:13:12,714 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:13:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:13:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2022-01-31 12:13:12,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:13:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633795307] [2022-01-31 12:13:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:12,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:13:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:12,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:13:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:12,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:13:12,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633795307] [2022-01-31 12:13:12,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633795307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:13:12,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:13:12,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 12:13:12,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083089777] [2022-01-31 12:13:12,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:13:12,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 12:13:12,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:13:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 12:13:12,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 12:13:12,808 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-01-31 12:13:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:13:12,868 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-01-31 12:13:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 12:13:12,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-01-31 12:13:12,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:13:12,869 INFO L225 Difference]: With dead ends: 20 [2022-01-31 12:13:12,869 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 12:13:12,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 12:13:12,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:13:12,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:13:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 12:13:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 12:13:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-01-31 12:13:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-31 12:13:12,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-31 12:13:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:13:12,875 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-31 12:13:12,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-01-31 12:13:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-31 12:13:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 12:13:12,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:13:12,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:13:12,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:13:12,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:13:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:13:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2022-01-31 12:13:12,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:13:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243576314] [2022-01-31 12:13:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:12,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:13:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:13:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:13,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:13:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243576314] [2022-01-31 12:13:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243576314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:13:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876616374] [2022-01-31 12:13:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:13,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:13:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:13:13,104 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) [2022-01-31 12:13:13,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 12:13:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 12:13:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:13:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:13,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:13:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:13,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876616374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:13:13,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:13:13,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-31 12:13:13,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025122995] [2022-01-31 12:13:13,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:13:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 12:13:13,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:13:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 12:13:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-31 12:13:13,562 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-01-31 12:13:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:13:13,927 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 12:13:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 12:13:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 14 [2022-01-31 12:13:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:13:13,929 INFO L225 Difference]: With dead ends: 26 [2022-01-31 12:13:13,929 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 12:13:13,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-01-31 12:13:13,931 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:13:13,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:13:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 12:13:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 12:13:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-01-31 12:13:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-31 12:13:13,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-01-31 12:13:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:13:13,935 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-31 12:13:13,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-01-31 12:13:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-31 12:13:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 12:13:13,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:13:13,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:13:13,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 12:13:14,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:13:14,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:13:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:13:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1411179434, now seen corresponding path program 2 times [2022-01-31 12:13:14,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:13:14,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114024533] [2022-01-31 12:13:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:14,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:13:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:14,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:13:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:13:14,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:13:14,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114024533] [2022-01-31 12:13:14,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114024533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:13:14,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138520843] [2022-01-31 12:13:14,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:13:14,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:13:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:13:14,344 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) [2022-01-31 12:13:14,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 12:13:14,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:13:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:13:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 12:13:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:13:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:14,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:13:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:15,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138520843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:13:15,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:13:15,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-31 12:13:15,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120582902] [2022-01-31 12:13:15,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:13:15,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 12:13:15,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:13:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 12:13:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-31 12:13:15,183 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2022-01-31 12:13:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:13:15,753 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-01-31 12:13:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 12:13:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 20 [2022-01-31 12:13:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:13:15,755 INFO L225 Difference]: With dead ends: 34 [2022-01-31 12:13:15,755 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 12:13:15,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 12:13:15,757 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:13:15,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 81 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:13:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 12:13:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 12:13:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-01-31 12:13:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 12:13:15,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-01-31 12:13:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:13:15,761 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 12:13:15,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2022-01-31 12:13:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 12:13:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 12:13:15,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:13:15,762 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:13:15,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 12:13:15,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 12:13:15,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:13:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:13:15,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1657807639, now seen corresponding path program 1 times [2022-01-31 12:13:15,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:13:15,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472179961] [2022-01-31 12:13:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:15,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:13:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:16,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:13:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:16,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:13:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472179961] [2022-01-31 12:13:16,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472179961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:13:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421834503] [2022-01-31 12:13:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:16,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:13:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:13:16,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:13:16,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 12:13:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:13:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 12:13:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:13:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:13:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:13:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421834503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:13:16,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:13:16,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-31 12:13:16,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096924069] [2022-01-31 12:13:16,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:13:16,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 12:13:16,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:13:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 12:13:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 12:13:16,259 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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) [2022-01-31 12:13:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:13:16,386 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-01-31 12:13:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 12:13:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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 26 [2022-01-31 12:13:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:13:16,388 INFO L225 Difference]: With dead ends: 44 [2022-01-31 12:13:16,388 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 12:13:16,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2022-01-31 12:13:16,389 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:13:16,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:13:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 12:13:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-01-31 12:13:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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) [2022-01-31 12:13:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-01-31 12:13:16,393 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2022-01-31 12:13:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:13:16,394 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-01-31 12:13:16,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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) [2022-01-31 12:13:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-01-31 12:13:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 12:13:16,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:13:16,395 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:13:16,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 12:13:16,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:13:16,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:13:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:13:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2063074549, now seen corresponding path program 2 times [2022-01-31 12:13:16,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:13:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977972117] [2022-01-31 12:13:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:13:16,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:13:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 12:13:16,639 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 12:13:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 12:13:16,675 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 12:13:16,675 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 12:13:16,676 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 12:13:16,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 12:13:16,680 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-01-31 12:13:16,683 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 12:13:16,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:13:16 BasicIcfg [2022-01-31 12:13:16,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 12:13:16,709 INFO L158 Benchmark]: Toolchain (without parser) took 4964.22ms. Allocated memory was 212.9MB in the beginning and 383.8MB in the end (delta: 170.9MB). Free memory was 157.3MB in the beginning and 229.6MB in the end (delta: -72.3MB). Peak memory consumption was 98.3MB. Max. memory is 8.0GB. [2022-01-31 12:13:16,710 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 212.9MB. Free memory is still 174.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:13:16,710 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.50ms. Allocated memory was 212.9MB in the beginning and 383.8MB in the end (delta: 170.9MB). Free memory was 157.2MB in the beginning and 355.1MB in the end (delta: -197.9MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-01-31 12:13:16,710 INFO L158 Benchmark]: Boogie Preprocessor took 30.12ms. Allocated memory is still 383.8MB. Free memory was 355.1MB in the beginning and 354.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:13:16,710 INFO L158 Benchmark]: RCFGBuilder took 229.40ms. Allocated memory is still 383.8MB. Free memory was 354.0MB in the beginning and 343.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 12:13:16,711 INFO L158 Benchmark]: IcfgTransformer took 14.58ms. Allocated memory is still 383.8MB. Free memory was 343.6MB in the beginning and 342.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:13:16,711 INFO L158 Benchmark]: TraceAbstraction took 4420.53ms. Allocated memory is still 383.8MB. Free memory was 342.0MB in the beginning and 229.6MB in the end (delta: 112.4MB). Peak memory consumption was 111.9MB. Max. memory is 8.0GB. [2022-01-31 12:13:16,712 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 212.9MB. Free memory is still 174.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 261.50ms. Allocated memory was 212.9MB in the beginning and 383.8MB in the end (delta: 170.9MB). Free memory was 157.2MB in the beginning and 355.1MB in the end (delta: -197.9MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.12ms. Allocated memory is still 383.8MB. Free memory was 355.1MB in the beginning and 354.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.40ms. Allocated memory is still 383.8MB. Free memory was 354.0MB in the beginning and 343.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.58ms. Allocated memory is still 383.8MB. Free memory was 343.6MB in the beginning and 342.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 4420.53ms. Allocated memory is still 383.8MB. Free memory was 342.0MB in the beginning and 229.6MB in the end (delta: 112.4MB). Peak memory consumption was 111.9MB. 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 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=10, n=0] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=10, n=2] [L24] COND TRUE i<=n VAL [i=2, n=2, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=4, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=10, n=6] [L24] i++ VAL [i=4, n=10, n=6] [L24] COND TRUE i<=n VAL [i=4, n=6, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=10, n=8] [L24] COND TRUE i<=n VAL [i=5, n=8, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=12, n=10] [L24] i++ VAL [i=7, n=12, n=10] [L24] COND TRUE i<=n VAL [i=7, n=10, n=12] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=14, n=10] [L24] i++ VAL [i=8, n=10, n=14] [L24] COND TRUE i<=n VAL [i=8, n=14, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=10, n=16] [L24] i++ VAL [i=9, n=10, n=16] [L24] COND TRUE i<=n VAL [i=9, n=16, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=10, n=18] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=18, n=10] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=10, n=18] [L24] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 133 mSDsluCounter, 228 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 166 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 523 IncrementalHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 62 mSDtfsCounter, 523 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 205 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 191 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066 SizeOfPredicates, 6 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 28/144 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 RESULT: Ultimate proved your program to be incorrect! [2022-01-31 12:13:16,771 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...