/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:03:19,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:03:19,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:03:19,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 04:03:19,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 04:03:19,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 04:03:19,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 04:03:19,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 04:03:19,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 04:03:19,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 04:03:19,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 04:03:19,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 04:03:19,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:03:19,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:03:19,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:03:19,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:03:19,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:03:19,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:03:19,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:03:19,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:03:19,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:03:19,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:03:19,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:03:19,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:03:19,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 04:03:19,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 04:03:19,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 04:03:19,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 04:03:19,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 04:03:19,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 04:03:19,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 04:03:19,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 04:03:19,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 04:03:19,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 04:03:19,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 04:03:19,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 04:03:19,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 04:03:19,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 04:03:19,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:03:19,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:03:19,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:03:19,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:03:19,916 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:03:19,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:03:19,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:03:19,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:03:19,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:03:19,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:03:19,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:03:19,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:03:19,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:03:19,918 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:03:19,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:03:19,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:03:19,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:03:19,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:03:19,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:03:19,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:03:19,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:03:19,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:03:19,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:03:19,920 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:03:19,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:03:20,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:03:20,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:03:20,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:03:20,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:03:20,132 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:03:20,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-02-15 04:03:20,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5197000ce/a5ac3e7f006546b099f130648fc6a32c/FLAG19a4e349f [2022-02-15 04:03:20,483 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:03:20,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-02-15 04:03:20,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5197000ce/a5ac3e7f006546b099f130648fc6a32c/FLAG19a4e349f [2022-02-15 04:03:20,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5197000ce/a5ac3e7f006546b099f130648fc6a32c [2022-02-15 04:03:20,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:03:20,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:03:20,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:03:20,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:03:20,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:03:20,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:03:20" (1/1) ... [2022-02-15 04:03:20,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a2ae7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:20, skipping insertion in model container [2022-02-15 04:03:20,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:03:20" (1/1) ... [2022-02-15 04:03:20,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:03:20,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:03:21,084 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-crafted-1/nested3-2.c[321,334] [2022-02-15 04:03:21,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:03:21,101 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:03:21,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-02-15 04:03:21,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:03:21,120 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:03:21,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21 WrapperNode [2022-02-15 04:03:21,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:03:21,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:03:21,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:03:21,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:03:21,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:03:21,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:03:21,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:03:21,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:03:21,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (1/1) ... [2022-02-15 04:03:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:03:21,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:03:21,162 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) [2022-02-15 04:03:21,184 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 [2022-02-15 04:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:03:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:03:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:03:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:03:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:03:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:03:21,254 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:03:21,256 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:03:21,393 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:03:21,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:03:21,398 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 04:03:21,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:03:21 BoogieIcfgContainer [2022-02-15 04:03:21,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:03:21,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:03:21,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:03:21,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:03:21,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:03:20" (1/3) ... [2022-02-15 04:03:21,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502ff10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:03:21, skipping insertion in model container [2022-02-15 04:03:21,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:03:21" (2/3) ... [2022-02-15 04:03:21,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502ff10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:03:21, skipping insertion in model container [2022-02-15 04:03:21,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:03:21" (3/3) ... [2022-02-15 04:03:21,417 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2022-02-15 04:03:21,420 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:03:21,420 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:03:21,466 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:03:21,472 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=QVASR [2022-02-15 04:03:21,472 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:03:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 04:03:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 04:03:21,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:03:21,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:03:21,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:03:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:03:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-02-15 04:03:21,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:03:21,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387970831] [2022-02-15 04:03:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:03:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:03:21,537 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:03:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:21,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:03:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:03:21,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:03:21,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387970831] [2022-02-15 04:03:21,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [387970831] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:03:21,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:03:21,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 04:03:21,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630615929] [2022-02-15 04:03:21,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:03:21,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 04:03:21,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:03:21,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 04:03:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:03:21,660 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-02-15 04:03:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:03:21,718 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-02-15 04:03:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 04:03:21,721 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 [2022-02-15 04:03:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:03:21,729 INFO L225 Difference]: With dead ends: 44 [2022-02-15 04:03:21,729 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 04:03:21,732 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 [2022-02-15 04:03:21,735 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:03:21,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:03:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 04:03:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 04:03:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 04:03:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-02-15 04:03:21,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-02-15 04:03:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:03:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-02-15 04:03:21,776 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) [2022-02-15 04:03:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-02-15 04:03:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 04:03:21,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:03:21,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:03:21,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:03:21,779 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:03:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:03:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-02-15 04:03:21,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:03:21,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643822176] [2022-02-15 04:03:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:03:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:03:21,785 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:03:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:03:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:03:21,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:03:21,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643822176] [2022-02-15 04:03:21,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643822176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:03:21,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:03:21,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:03:21,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338773089] [2022-02-15 04:03:21,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:03:21,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:03:21,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:03:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:03:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:03:21,904 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:03:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:03:21,985 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-15 04:03:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:03:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 04:03:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:03:21,986 INFO L225 Difference]: With dead ends: 34 [2022-02-15 04:03:21,986 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 04:03:21,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:03:21,988 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:03:21,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:03:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 04:03:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-02-15 04:03:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 04:03:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-02-15 04:03:21,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-02-15 04:03:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:03:21,994 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-02-15 04:03:21,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:03:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-02-15 04:03:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 04:03:21,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:03:21,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:03:21,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:03:21,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:03:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:03:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-02-15 04:03:21,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:03:21,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710498611] [2022-02-15 04:03:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:03:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:03:21,998 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:03:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:03:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:03:22,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:03:22,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710498611] [2022-02-15 04:03:22,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710498611] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:03:22,038 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:03:22,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:03:22,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904972861] [2022-02-15 04:03:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:03:22,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:03:22,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:03:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:03:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:03:22,040 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:03:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:03:22,079 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-15 04:03:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:03:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 04:03:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:03:22,080 INFO L225 Difference]: With dead ends: 39 [2022-02-15 04:03:22,080 INFO L226 Difference]: Without dead ends: 25 [2022-02-15 04:03:22,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:03:22,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:03:22,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:03:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-15 04:03:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-15 04:03:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 04:03:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-02-15 04:03:22,086 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-02-15 04:03:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:03:22,087 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-02-15 04:03:22,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:03:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-02-15 04:03:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 04:03:22,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:03:22,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:03:22,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:03:22,088 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:03:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:03:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-02-15 04:03:22,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:03:22,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110090970] [2022-02-15 04:03:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:03:22,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:03:22,090 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:03:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:03:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:03:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:03:22,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:03:22,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110090970] [2022-02-15 04:03:22,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110090970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:03:22,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:03:22,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:03:22,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43964671] [2022-02-15 04:03:22,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:03:22,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:03:22,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:03:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:03:22,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:03:22,129 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-02-15 04:03:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:03:22,173 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-02-15 04:03:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:03:22,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-02-15 04:03:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:03:22,175 INFO L225 Difference]: With dead ends: 39 [2022-02-15 04:03:22,175 INFO L226 Difference]: Without dead ends: 24 [2022-02-15 04:03:22,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:03:22,176 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:03:22,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 04:03:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-15 04:03:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-02-15 04:03:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 04:03:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-02-15 04:03:22,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-02-15 04:03:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:03:22,181 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-02-15 04:03:22,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-02-15 04:03:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-15 04:03:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 04:03:22,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:03:22,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:03:22,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:03:22,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:03:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:03:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-02-15 04:03:22,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:03:22,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675686900] [2022-02-15 04:03:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:03:22,245 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 04:03:22,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:03:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 04:03:22,260 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 04:03:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 04:03:22,284 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 04:03:22,284 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 04:03:22,286 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:03:22,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:03:22,289 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-15 04:03:22,291 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 04:03:22,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 04:03:22 BoogieIcfgContainer [2022-02-15 04:03:22,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 04:03:22,298 INFO L158 Benchmark]: Toolchain (without parser) took 1360.86ms. Allocated memory was 181.4MB in the beginning and 248.5MB in the end (delta: 67.1MB). Free memory was 129.4MB in the beginning and 151.1MB in the end (delta: -21.8MB). Peak memory consumption was 46.9MB. Max. memory is 8.0GB. [2022-02-15 04:03:22,298 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory is still 145.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:03:22,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.09ms. Allocated memory was 181.4MB in the beginning and 248.5MB in the end (delta: 67.1MB). Free memory was 129.2MB in the beginning and 223.5MB in the end (delta: -94.2MB). Peak memory consumption was 8.2MB. Max. memory is 8.0GB. [2022-02-15 04:03:22,299 INFO L158 Benchmark]: Boogie Preprocessor took 19.12ms. Allocated memory is still 248.5MB. Free memory was 223.5MB in the beginning and 221.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 04:03:22,299 INFO L158 Benchmark]: RCFGBuilder took 258.40ms. Allocated memory is still 248.5MB. Free memory was 221.9MB in the beginning and 210.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 04:03:22,299 INFO L158 Benchmark]: TraceAbstraction took 897.22ms. Allocated memory is still 248.5MB. Free memory was 209.8MB in the beginning and 151.1MB in the end (delta: 58.7MB). Peak memory consumption was 58.7MB. Max. memory is 8.0GB. [2022-02-15 04:03:22,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory is still 145.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.09ms. Allocated memory was 181.4MB in the beginning and 248.5MB in the end (delta: 67.1MB). Free memory was 129.2MB in the beginning and 223.5MB in the end (delta: -94.2MB). Peak memory consumption was 8.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.12ms. Allocated memory is still 248.5MB. Free memory was 223.5MB in the beginning and 221.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 258.40ms. Allocated memory is still 248.5MB. Free memory was 221.9MB in the beginning and 210.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 897.22ms. Allocated memory is still 248.5MB. Free memory was 209.8MB in the beginning and 151.1MB in the end (delta: 58.7MB). Peak memory consumption was 58.7MB. 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = 0; [L16] unsigned int z = 0; [L17] unsigned int w = 0; [L19] COND TRUE x < 0x0fffffff [L20] y = 0 [L22] COND TRUE y < 0x0fffffff [L23] z =0 [L24] COND TRUE z <0x0fffffff [L25] z++ [L24] COND FALSE !(z <0x0fffffff) [L27] CALL __VERIFIER_assert(!(z % 4)) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 111 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 74 IncrementalHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 87 mSDtfsCounter, 74 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 15, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-15 04:03:22,329 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...