/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:23:33,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:23:33,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:23:34,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 01:23:34,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 01:23:34,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 01:23:34,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 01:23:34,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 01:23:34,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 01:23:34,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 01:23:34,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 01:23:34,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 01:23:34,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 01:23:34,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 01:23:34,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 01:23:34,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 01:23:34,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 01:23:34,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 01:23:34,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 01:23:34,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 01:23:34,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 01:23:34,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 01:23:34,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 01:23:34,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 01:23:34,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-24 01:23:34,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-24 01:23:34,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-24 01:23:34,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-24 01:23:34,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-24 01:23:34,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-24 01:23:34,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-24 01:23:34,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-24 01:23:34,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-24 01:23:34,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-24 01:23:34,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-24 01:23:34,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-24 01:23:34,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-24 01:23:34,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-24 01:23:34,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:23:34,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:23:34,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:23:34,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:23:34,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:23:34,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:23:34,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:23:34,074 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:23:34,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:23:34,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:23:34,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:23:34,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:23:34,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:23:34,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:23:34,076 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:23:34,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:23:34,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:23:34,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:23:34,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:23:34,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:23:34,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:23:34,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:23:34,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:23:34,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:23:34,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:23:34,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:23:34,078 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:23:34,078 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:23:34,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:23:34,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:23:34,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:23:34,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:23:34,337 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:23:34,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-02-24 01:23:34,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73c8d2f1f/c92f07733c654a78822493dcf331c910/FLAG61dba099f [2022-02-24 01:23:34,788 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:23:34,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2022-02-24 01:23:34,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73c8d2f1f/c92f07733c654a78822493dcf331c910/FLAG61dba099f [2022-02-24 01:23:34,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73c8d2f1f/c92f07733c654a78822493dcf331c910 [2022-02-24 01:23:34,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:23:34,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:23:34,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:23:34,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:23:34,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:23:34,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:23:34" (1/1) ... [2022-02-24 01:23:34,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f23461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:34, skipping insertion in model container [2022-02-24 01:23:34,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:23:34" (1/1) ... [2022-02-24 01:23:34,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:23:34,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:23:34,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i[849,862] [2022-02-24 01:23:34,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:23:35,001 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:23:35,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i[849,862] [2022-02-24 01:23:35,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:23:35,033 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:23:35,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35 WrapperNode [2022-02-24 01:23:35,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:23:35,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:23:35,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:23:35,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:23:35,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:23:35,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:23:35,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:23:35,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:23:35,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (1/1) ... [2022-02-24 01:23:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:23:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:23:35,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:23:35,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:23:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:23:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:23:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:23:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:23:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:23:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:23:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:23:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 01:23:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 01:23:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:23:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:23:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:23:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:23:35,182 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:23:35,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:23:35,269 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:23:35,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:23:35,274 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 01:23:35,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:23:35 BoogieIcfgContainer [2022-02-24 01:23:35,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:23:35,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:23:35,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:23:35,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:23:35,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:23:34" (1/3) ... [2022-02-24 01:23:35,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb4bf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:23:35, skipping insertion in model container [2022-02-24 01:23:35,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:23:35" (2/3) ... [2022-02-24 01:23:35,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb4bf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:23:35, skipping insertion in model container [2022-02-24 01:23:35,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:23:35" (3/3) ... [2022-02-24 01:23:35,287 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2022-02-24 01:23:35,294 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:23:35,294 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:23:35,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:23:35,341 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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=JORDAN [2022-02-24 01:23:35,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:23:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:23:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-24 01:23:35,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:35,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:35,361 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1037683284, now seen corresponding path program 1 times [2022-02-24 01:23:35,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:35,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552193412] [2022-02-24 01:23:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:35,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:35,430 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:23:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:35,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:35,551 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:35,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552193412] [2022-02-24 01:23:35,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [552193412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:35,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:35,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:23:35,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173006509] [2022-02-24 01:23:35,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:35,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:23:35,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:35,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:23:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:23:35,621 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:35,688 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-24 01:23:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:23:35,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-24 01:23:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:35,695 INFO L225 Difference]: With dead ends: 42 [2022-02-24 01:23:35,695 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 01:23:35,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:23:35,707 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:35,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:23:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 01:23:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 01:23:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-24 01:23:35,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-02-24 01:23:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:35,759 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-24 01:23:35,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-24 01:23:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 01:23:35,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:35,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:35,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:23:35,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:35,762 INFO L85 PathProgramCache]: Analyzing trace with hash -193552662, now seen corresponding path program 1 times [2022-02-24 01:23:35,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:35,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226017241] [2022-02-24 01:23:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:35,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:35,772 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:23:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:35,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:35,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226017241] [2022-02-24 01:23:35,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226017241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:35,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:35,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:23:35,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332986870] [2022-02-24 01:23:35,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:35,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:23:35,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:23:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:23:35,888 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:35,949 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-02-24 01:23:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:23:35,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 01:23:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:35,952 INFO L225 Difference]: With dead ends: 35 [2022-02-24 01:23:35,952 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 01:23:35,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:23:35,954 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:35,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:23:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 01:23:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-24 01:23:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-02-24 01:23:35,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-02-24 01:23:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:35,962 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-02-24 01:23:35,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-02-24 01:23:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 01:23:35,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:35,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:35,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:23:35,963 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1156315956, now seen corresponding path program 1 times [2022-02-24 01:23:35,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:35,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522840733] [2022-02-24 01:23:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:35,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:35,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:35,986 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:35,986 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:36,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:36,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522840733] [2022-02-24 01:23:36,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [522840733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:36,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:36,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:23:36,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035879378] [2022-02-24 01:23:36,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:36,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:23:36,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:36,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:23:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:23:36,044 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:36,152 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-02-24 01:23:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:23:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 01:23:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:36,155 INFO L225 Difference]: With dead ends: 45 [2022-02-24 01:23:36,155 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 01:23:36,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:23:36,157 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:36,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:23:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 01:23:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-02-24 01:23:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2022-02-24 01:23:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-02-24 01:23:36,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2022-02-24 01:23:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:36,165 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-02-24 01:23:36,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-02-24 01:23:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:23:36,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:36,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:36,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:23:36,167 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1341094446, now seen corresponding path program 2 times [2022-02-24 01:23:36,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:36,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945999435] [2022-02-24 01:23:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:36,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:36,180 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:36,180 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:36,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:36,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945999435] [2022-02-24 01:23:36,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945999435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:36,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:36,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:23:36,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052805665] [2022-02-24 01:23:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:36,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:23:36,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:23:36,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:23:36,298 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:36,383 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-02-24 01:23:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:23:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 01:23:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:36,387 INFO L225 Difference]: With dead ends: 33 [2022-02-24 01:23:36,387 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 01:23:36,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:23:36,392 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:36,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:23:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 01:23:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 01:23:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2022-02-24 01:23:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-24 01:23:36,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2022-02-24 01:23:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-24 01:23:36,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-24 01:23:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:23:36,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:36,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:36,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:23:36,406 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:36,407 INFO L85 PathProgramCache]: Analyzing trace with hash -746180299, now seen corresponding path program 1 times [2022-02-24 01:23:36,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:36,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222639153] [2022-02-24 01:23:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:36,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:36,416 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:36,416 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:36,416 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:36,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:36,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222639153] [2022-02-24 01:23:36,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222639153] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:36,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:36,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:23:36,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706703] [2022-02-24 01:23:36,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:36,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:23:36,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:23:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:23:36,522 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:36,640 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-02-24 01:23:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:23:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 [2022-02-24 01:23:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:36,642 INFO L225 Difference]: With dead ends: 35 [2022-02-24 01:23:36,642 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 01:23:36,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:23:36,644 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:36,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:23:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 01:23:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-02-24 01:23:36,660 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) [2022-02-24 01:23:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-24 01:23:36,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2022-02-24 01:23:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:36,664 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-24 01:23:36,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-24 01:23:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:23:36,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:36,667 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:36,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:23:36,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1353970500, now seen corresponding path program 2 times [2022-02-24 01:23:36,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:36,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659197844] [2022-02-24 01:23:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:36,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:36,675 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:36,676 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:36,771 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:36,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659197844] [2022-02-24 01:23:36,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659197844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:36,771 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:36,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:23:36,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893420701] [2022-02-24 01:23:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:36,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:23:36,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:23:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:23:36,774 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 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) [2022-02-24 01:23:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:36,850 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-02-24 01:23:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:23:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 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 26 [2022-02-24 01:23:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:36,852 INFO L225 Difference]: With dead ends: 28 [2022-02-24 01:23:36,852 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 01:23:36,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:23:36,857 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:36,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:23:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 01:23:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 01:23:36,863 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) [2022-02-24 01:23:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 01:23:36,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-02-24 01:23:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:36,863 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 01:23:36,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 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) [2022-02-24 01:23:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 01:23:36,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 01:23:36,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:23:36,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:23:36,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 01:23:36,973 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-02-24 01:23:36,973 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-02-24 01:23:36,973 INFO L858 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-02-24 01:23:36,973 INFO L861 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: true [2022-02-24 01:23:36,973 INFO L854 garLoopResultBuilder]: At program point L29(lines 29 31) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-24 01:23:36,973 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2022-02-24 01:23:36,974 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2022-02-24 01:23:36,974 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2022-02-24 01:23:36,974 INFO L854 garLoopResultBuilder]: At program point L28-1(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-24 01:23:36,974 INFO L854 garLoopResultBuilder]: At program point L28-3(lines 28 32) the Hoare annotation is: (<= main_~i~0 1022) [2022-02-24 01:23:36,974 INFO L854 garLoopResultBuilder]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-24 01:23:36,974 INFO L854 garLoopResultBuilder]: At program point L28-5(lines 28 32) the Hoare annotation is: (<= main_~i~0 1024) [2022-02-24 01:23:36,974 INFO L854 garLoopResultBuilder]: At program point L24-2(lines 24 26) the Hoare annotation is: (<= main_~i~0 1023) [2022-02-24 01:23:36,974 INFO L861 garLoopResultBuilder]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2022-02-24 01:23:36,974 INFO L861 garLoopResultBuilder]: At program point L24-4(lines 24 26) the Hoare annotation is: true [2022-02-24 01:23:36,974 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-24 01:23:36,975 INFO L854 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2022-02-24 01:23:36,975 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2022-02-24 01:23:36,976 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-02-24 01:23:36,978 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-02-24 01:23:36,979 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 01:23:36,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 01:23:36 BoogieIcfgContainer [2022-02-24 01:23:36,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 01:23:36,991 INFO L158 Benchmark]: Toolchain (without parser) took 2166.28ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 127.6MB in the beginning and 133.1MB in the end (delta: -5.5MB). Peak memory consumption was 30.6MB. Max. memory is 8.0GB. [2022-02-24 01:23:36,991 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:23:36,992 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.31ms. Allocated memory is still 176.2MB. Free memory was 127.3MB in the beginning and 152.8MB in the end (delta: -25.5MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-02-24 01:23:36,992 INFO L158 Benchmark]: Boogie Preprocessor took 31.19ms. Allocated memory is still 176.2MB. Free memory was 152.8MB in the beginning and 151.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 01:23:36,992 INFO L158 Benchmark]: RCFGBuilder took 210.32ms. Allocated memory is still 176.2MB. Free memory was 151.4MB in the beginning and 141.6MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-24 01:23:36,993 INFO L158 Benchmark]: TraceAbstraction took 1713.36ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 140.9MB in the beginning and 133.1MB in the end (delta: 7.8MB). Peak memory consumption was 43.8MB. Max. memory is 8.0GB. [2022-02-24 01:23:36,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 176.2MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.31ms. Allocated memory is still 176.2MB. Free memory was 127.3MB in the beginning and 152.8MB in the end (delta: -25.5MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.19ms. Allocated memory is still 176.2MB. Free memory was 152.8MB in the beginning and 151.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 210.32ms. Allocated memory is still 176.2MB. Free memory was 151.4MB in the beginning and 141.6MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1713.36ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 140.9MB in the beginning and 133.1MB in the end (delta: 7.8MB). Peak memory consumption was 43.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 155 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 154 mSDsluCounter, 173 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 78 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 204 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 95 mSDtfsCounter, 204 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 25 LocationsWithAnnotation, 55 PreInvPairs, 88 NumberOfFragments, 54 HoareAnnotationTreeSize, 55 FomulaSimplifications, 54 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 25 FomulaSimplificationsInter, 57 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-02-24 01:23:37,030 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...