/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:19:58,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:19:58,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:19:58,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 22:19:58,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 22:19:58,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 22:19:58,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 22:19:58,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 22:19:58,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 22:19:58,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 22:19:58,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 22:19:58,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 22:19:58,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 22:19:58,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 22:19:58,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 22:19:58,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 22:19:58,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 22:19:58,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 22:19:58,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 22:19:58,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 22:19:58,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 22:19:58,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 22:19:58,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 22:19:58,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 22:19:58,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 22:19:58,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:19:58,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:19:58,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:19:58,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:19:58,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:19:58,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:19:58,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:19:58,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:19:58,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:19:58,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:19:58,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:19:58,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:19:58,213 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:19:58,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:19:58,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:19:58,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:19:58,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:19:58,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:19:58,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:19:58,215 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:19:58,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:19:58,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:19:58,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:19:58,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:19:58,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:19:58,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:19:58,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:19:58,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:19:58,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:19:58,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:19:58,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:19:58,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:19:58,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:19:58,451 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:19:58,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2022-01-09 22:19:58,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa192921a/cb2c62722c7f4768aaf729b0326ffe2a/FLAGe928f9cab [2022-01-09 22:19:58,893 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:19:58,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2022-01-09 22:19:58,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa192921a/cb2c62722c7f4768aaf729b0326ffe2a/FLAGe928f9cab [2022-01-09 22:19:58,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa192921a/cb2c62722c7f4768aaf729b0326ffe2a [2022-01-09 22:19:58,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:19:58,920 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:19:58,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:19:58,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:19:58,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:19:58,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:19:58" (1/1) ... [2022-01-09 22:19:58,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e950202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:58, skipping insertion in model container [2022-01-09 22:19:58,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:19:58" (1/1) ... [2022-01-09 22:19:58,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:19:58,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:19:59,118 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/linear_search.c[383,396] [2022-01-09 22:19:59,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:19:59,163 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:19:59,176 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/linear_search.c[383,396] [2022-01-09 22:19:59,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:19:59,200 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:19:59,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59 WrapperNode [2022-01-09 22:19:59,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:19:59,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:19:59,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:19:59,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:19:59,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,244 INFO L137 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 59 [2022-01-09 22:19:59,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:19:59,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:19:59,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:19:59,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:19:59,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:19:59,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:19:59,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:19:59,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:19:59,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (1/1) ... [2022-01-09 22:19:59,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:19:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:59,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 22:19:59,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 22:19:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:19:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:19:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 22:19:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 22:19:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:19:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:19:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 22:19:59,435 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:19:59,437 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:19:59,563 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:19:59,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:19:59,568 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:19:59,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:19:59 BoogieIcfgContainer [2022-01-09 22:19:59,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:19:59,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:19:59,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:19:59,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:19:59,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:19:58" (1/3) ... [2022-01-09 22:19:59,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9120ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:19:59, skipping insertion in model container [2022-01-09 22:19:59,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:59" (2/3) ... [2022-01-09 22:19:59,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9120ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:19:59, skipping insertion in model container [2022-01-09 22:19:59,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:19:59" (3/3) ... [2022-01-09 22:19:59,576 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.c [2022-01-09 22:19:59,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:19:59,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:19:59,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:19:59,640 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:19:59,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:19:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2022-01-09 22:19:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-09 22:19:59,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:59,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:59,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash 587445447, now seen corresponding path program 1 times [2022-01-09 22:19:59,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:59,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339152666] [2022-01-09 22:19:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:59,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:19:59,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:59,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339152666] [2022-01-09 22:19:59,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339152666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:59,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:19:59,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:19:59,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458577484] [2022-01-09 22:19:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:59,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:19:59,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:19:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:19:59,882 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-01-09 22:19:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:59,892 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-01-09 22:19:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:19:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) Word has length 10 [2022-01-09 22:19:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:59,901 INFO L225 Difference]: With dead ends: 27 [2022-01-09 22:19:59,901 INFO L226 Difference]: Without dead ends: 14 [2022-01-09 22:19:59,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:19:59,906 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:59,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-09 22:19:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-09 22:19:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-01-09 22:19:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-01-09 22:19:59,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2022-01-09 22:19:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:59,933 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-01-09 22:19:59,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-01-09 22:19:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-01-09 22:19:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 22:19:59,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:59,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:59,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:19:59,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1622239834, now seen corresponding path program 1 times [2022-01-09 22:19:59,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460618477] [2022-01-09 22:19:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:59,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:00,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:00,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460618477] [2022-01-09 22:20:00,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460618477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:00,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:20:00,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:20:00,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783568131] [2022-01-09 22:20:00,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:00,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:20:00,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:00,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:20:00,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:20:00,080 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-01-09 22:20:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:00,105 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-01-09 22:20:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:20:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 12 [2022-01-09 22:20:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:00,107 INFO L225 Difference]: With dead ends: 18 [2022-01-09 22:20:00,107 INFO L226 Difference]: Without dead ends: 14 [2022-01-09 22:20:00,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:20:00,112 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:00,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-09 22:20:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-09 22:20:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-01-09 22:20:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-01-09 22:20:00,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 12 [2022-01-09 22:20:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:00,121 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-01-09 22:20:00,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-01-09 22:20:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-01-09 22:20:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 22:20:00,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:00,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:00,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:20:00,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1622299416, now seen corresponding path program 1 times [2022-01-09 22:20:00,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327496368] [2022-01-09 22:20:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:00,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:00,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327496368] [2022-01-09 22:20:00,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327496368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:00,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:20:00,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-09 22:20:00,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15874772] [2022-01-09 22:20:00,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:00,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:20:00,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:20:00,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:20:00,403 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-01-09 22:20:02,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-09 22:20:04,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-09 22:20:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:04,844 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-01-09 22:20:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:20:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) Word has length 12 [2022-01-09 22:20:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:04,846 INFO L225 Difference]: With dead ends: 20 [2022-01-09 22:20:04,846 INFO L226 Difference]: Without dead ends: 15 [2022-01-09 22:20:04,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:20:04,847 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:04,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-01-09 22:20:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-09 22:20:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-09 22:20:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-01-09 22:20:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-01-09 22:20:04,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2022-01-09 22:20:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:04,852 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-01-09 22:20:04,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-01-09 22:20:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-01-09 22:20:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 22:20:04,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:04,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:04,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 22:20:04,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1679557718, now seen corresponding path program 1 times [2022-01-09 22:20:04,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926317946] [2022-01-09 22:20:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:04,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:04,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926317946] [2022-01-09 22:20:04,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926317946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:04,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:20:04,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:20:04,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957101385] [2022-01-09 22:20:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:04,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:20:04,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:20:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:20:04,988 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-09 22:20:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:05,037 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-01-09 22:20:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:20:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 12 [2022-01-09 22:20:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:05,039 INFO L225 Difference]: With dead ends: 27 [2022-01-09 22:20:05,039 INFO L226 Difference]: Without dead ends: 16 [2022-01-09 22:20:05,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:20:05,040 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:05,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-09 22:20:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-09 22:20:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-01-09 22:20:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-09 22:20:05,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2022-01-09 22:20:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:05,046 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-09 22:20:05,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-01-09 22:20:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-09 22:20:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 22:20:05,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:05,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 22:20:05,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash -156373263, now seen corresponding path program 1 times [2022-01-09 22:20:05,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:05,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529777151] [2022-01-09 22:20:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:05,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:05,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529777151] [2022-01-09 22:20:05,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529777151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:05,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220677566] [2022-01-09 22:20:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:05,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:05,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:05,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:05,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process