/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:23:43,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:23:43,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:23:43,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:23:43,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:23:43,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:23:43,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:23:43,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:23:43,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:23:43,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:23:43,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:23:43,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:23:43,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:23:43,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:23:43,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:23:43,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:23:43,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:23:43,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:23:43,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:23:43,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:23:43,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:23:43,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:23:43,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:23:43,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:23:43,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 16:23:43,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 16:23:43,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 16:23:43,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 16:23:43,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 16:23:43,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 16:23:43,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:23:43,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:23:43,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:23:43,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:23:43,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:23:43,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:23:43,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:23:43,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:23:43,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:23:43,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:23:43,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:23:43,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 16:23:43,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:23:43,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:23:43,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:23:43,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:23:43,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:23:43,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:23:43,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:23:43,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:23:43,175 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:23:43,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:23:43,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:23:43,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:23:43,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:23:43,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:23:43,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:23:43,177 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:23:43,177 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:23:43,177 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:23:43,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:23:43,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:23:43,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:23:43,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:23:43,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:23:43,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:23:43,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:23:43,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:23:43,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:23:43,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:23:43,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:23:43,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:23:43,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:23:43,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:23:43,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:23:43,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:23:43,558 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:23:43,559 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:23:43,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/transpose-u.c [2022-10-15 16:23:43,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c809f01/7d8fb41c87a14c0cb2126e7c0ca91232/FLAGeb6be00df [2022-10-15 16:23:44,240 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:23:44,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c [2022-10-15 16:23:44,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c809f01/7d8fb41c87a14c0cb2126e7c0ca91232/FLAGeb6be00df [2022-10-15 16:23:44,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c809f01/7d8fb41c87a14c0cb2126e7c0ca91232 [2022-10-15 16:23:44,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:23:44,644 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:23:44,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:23:44,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:23:44,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:23:44,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e292491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44, skipping insertion in model container [2022-10-15 16:23:44,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:23:44,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:23:44,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2022-10-15 16:23:44,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:23:44,866 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:23:44,880 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2022-10-15 16:23:44,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:23:44,905 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:23:44,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44 WrapperNode [2022-10-15 16:23:44,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:23:44,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:23:44,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:23:44,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:23:44,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,950 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-10-15 16:23:44,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:23:44,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:23:44,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:23:44,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:23:44,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,977 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:23:44,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:23:44,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:23:44,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:23:44,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (1/1) ... [2022-10-15 16:23:44,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:23:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:45,025 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) [2022-10-15 16:23:45,035 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 [2022-10-15 16:23:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:23:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:23:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:23:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:23:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:23:45,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:23:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:23:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:23:45,194 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:23:45,198 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:23:45,622 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:23:45,633 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:23:45,635 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-15 16:23:45,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:23:45 BoogieIcfgContainer [2022-10-15 16:23:45,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:23:45,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:23:45,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:23:45,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:23:45,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:23:44" (1/3) ... [2022-10-15 16:23:45,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739af7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:23:45, skipping insertion in model container [2022-10-15 16:23:45,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:23:44" (2/3) ... [2022-10-15 16:23:45,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739af7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:23:45, skipping insertion in model container [2022-10-15 16:23:45,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:23:45" (3/3) ... [2022-10-15 16:23:45,649 INFO L112 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2022-10-15 16:23:45,672 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:23:45,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-10-15 16:23:45,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:23:45,817 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3f0b10c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:23:45,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-10-15 16:23:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 41 states have internal predecessors, (54), 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) [2022-10-15 16:23:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:23:45,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:45,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:23:45,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2022-10-15 16:23:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:45,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640293368] [2022-10-15 16:23:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:45,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:45,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:45,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325799502] [2022-10-15 16:23:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:45,965 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) [2022-10-15 16:23:45,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 16:23:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:46,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:23:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:46,152 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-15 16:23:46,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 16:23:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:46,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:46,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640293368] [2022-10-15 16:23:46,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:46,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325799502] [2022-10-15 16:23:46,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325799502] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:46,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:46,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:23:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375863679] [2022-10-15 16:23:46,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:46,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:23:46,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:23:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:23:46,237 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 41 states have internal predecessors, (54), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-10-15 16:23:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:46,297 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-10-15 16:23:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:23:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-10-15 16:23:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:46,312 INFO L225 Difference]: With dead ends: 39 [2022-10-15 16:23:46,313 INFO L226 Difference]: Without dead ends: 37 [2022-10-15 16:23:46,314 INFO L412 NwaCegarLoop]: 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 [2022-10-15 16:23:46,322 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:46,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:23:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-15 16:23:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-15 16:23:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.5) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-10-15 16:23:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-10-15 16:23:46,380 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 5 [2022-10-15 16:23:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:46,381 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-10-15 16:23:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-10-15 16:23:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-10-15 16:23:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 16:23:46,382 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:46,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 16:23:46,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:46,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-15 16:23:46,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 28698922, now seen corresponding path program 1 times [2022-10-15 16:23:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:46,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710451565] [2022-10-15 16:23:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:46,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:46,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647041141] [2022-10-15 16:23:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:46,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:46,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:46,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:46,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 16:23:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-15 16:23:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:46,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:23:46,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 16:23:46,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:23:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:46,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:46,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710451565] [2022-10-15 16:23:46,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647041141] [2022-10-15 16:23:46,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647041141] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:46,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 16:23:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426352663] [2022-10-15 16:23:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 16:23:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 16:23:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:23:46,867 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-10-15 16:23:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:47,008 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-10-15 16:23:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 16:23:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-10-15 16:23:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:47,011 INFO L225 Difference]: With dead ends: 48 [2022-10-15 16:23:47,011 INFO L226 Difference]: Without dead ends: 48 [2022-10-15 16:23:47,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 16:23:47,014 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:47,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 56 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:23:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-15 16:23:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-10-15 16:23:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 39 states have internal predecessors, (45), 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) [2022-10-15 16:23:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-10-15 16:23:47,023 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2022-10-15 16:23:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:47,024 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-10-15 16:23:47,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-10-15 16:23:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-10-15 16:23:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 16:23:47,025 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:47,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:47,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:47,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-10-15 16:23:47,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash -187207251, now seen corresponding path program 1 times [2022-10-15 16:23:47,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:47,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967686058] [2022-10-15 16:23:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:47,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:47,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:47,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556409204] [2022-10-15 16:23:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:47,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:47,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:47,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 16:23:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 16:23:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:47,401 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-10-15 16:23:47,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2022-10-15 16:23:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:47,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:47,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:47,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967686058] [2022-10-15 16:23:47,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556409204] [2022-10-15 16:23:47,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556409204] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:47,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:47,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-10-15 16:23:47,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281817382] [2022-10-15 16:23:47,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:47,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 16:23:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 16:23:48,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:23:48,004 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 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) [2022-10-15 16:23:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:48,488 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-10-15 16:23:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:23:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 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) Word has length 9 [2022-10-15 16:23:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:48,494 INFO L225 Difference]: With dead ends: 70 [2022-10-15 16:23:48,494 INFO L226 Difference]: Without dead ends: 70 [2022-10-15 16:23:48,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-10-15 16:23:48,508 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:48,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:23:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-15 16:23:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2022-10-15 16:23:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 54 states have internal predecessors, (65), 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) [2022-10-15 16:23:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-10-15 16:23:48,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 9 [2022-10-15 16:23:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:48,530 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-10-15 16:23:48,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 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) [2022-10-15 16:23:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-10-15 16:23:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-15 16:23:48,535 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:48,535 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-15 16:23:48,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-15 16:23:48,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:48,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1188288332, now seen corresponding path program 1 times [2022-10-15 16:23:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:48,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093902466] [2022-10-15 16:23:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:48,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:48,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211822749] [2022-10-15 16:23:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:48,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:48,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:48,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:48,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 16:23:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 16:23:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:48,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:48,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093902466] [2022-10-15 16:23:48,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211822749] [2022-10-15 16:23:48,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211822749] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:48,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:48,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-10-15 16:23:48,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115143830] [2022-10-15 16:23:48,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:48,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 16:23:48,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 16:23:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:23:48,977 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-10-15 16:23:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:49,294 INFO L93 Difference]: Finished difference Result 200 states and 209 transitions. [2022-10-15 16:23:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 16:23:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 16 [2022-10-15 16:23:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:49,297 INFO L225 Difference]: With dead ends: 200 [2022-10-15 16:23:49,297 INFO L226 Difference]: Without dead ends: 200 [2022-10-15 16:23:49,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-10-15 16:23:49,299 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 395 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:49,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 79 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:23:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-10-15 16:23:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2022-10-15 16:23:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 140 states have (on average 1.4071428571428573) internal successors, (197), 148 states have internal predecessors, (197), 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) [2022-10-15 16:23:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2022-10-15 16:23:49,316 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 16 [2022-10-15 16:23:49,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:49,316 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2022-10-15 16:23:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-10-15 16:23:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2022-10-15 16:23:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-15 16:23:49,318 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:49,318 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 1, 1, 1, 1, 1] [2022-10-15 16:23:49,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:49,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -355270616, now seen corresponding path program 2 times [2022-10-15 16:23:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302350429] [2022-10-15 16:23:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:49,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:49,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851196799] [2022-10-15 16:23:49,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:23:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:49,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:49,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 16:23:49,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:23:49,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:49,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 16:23:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:49,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302350429] [2022-10-15 16:23:49,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851196799] [2022-10-15 16:23:49,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851196799] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:49,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:49,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-10-15 16:23:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766441826] [2022-10-15 16:23:49,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 16:23:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 16:23:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-10-15 16:23:49,990 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2022-10-15 16:23:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:50,587 INFO L93 Difference]: Finished difference Result 424 states and 433 transitions. [2022-10-15 16:23:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-15 16:23:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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 32 [2022-10-15 16:23:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:50,591 INFO L225 Difference]: With dead ends: 424 [2022-10-15 16:23:50,592 INFO L226 Difference]: Without dead ends: 424 [2022-10-15 16:23:50,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=265, Invalid=335, Unknown=0, NotChecked=0, Total=600 [2022-10-15 16:23:50,593 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1123 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:50,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 136 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:23:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-10-15 16:23:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 301. [2022-10-15 16:23:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 292 states have (on average 1.4143835616438356) internal successors, (413), 300 states have internal predecessors, (413), 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) [2022-10-15 16:23:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 413 transitions. [2022-10-15 16:23:50,616 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 413 transitions. Word has length 32 [2022-10-15 16:23:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:50,616 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 413 transitions. [2022-10-15 16:23:50,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2022-10-15 16:23:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 413 transitions. [2022-10-15 16:23:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-15 16:23:50,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:50,619 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 2, 1, 1, 1, 1, 1] [2022-10-15 16:23:50,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:50,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:50,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1791985904, now seen corresponding path program 3 times [2022-10-15 16:23:50,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:50,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448302019] [2022-10-15 16:23:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:50,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:50,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488866047] [2022-10-15 16:23:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:23:50,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:50,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 16:23:50,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:23:50,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-10-15 16:23:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 16:23:51,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 16:23:51,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:23:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-15 16:23:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-10-15 16:23:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:53,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448302019] [2022-10-15 16:23:53,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:53,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488866047] [2022-10-15 16:23:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488866047] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:53,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:53,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-10-15 16:23:53,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789642516] [2022-10-15 16:23:53,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:53,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:23:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:23:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-15 16:23:53,728 INFO L87 Difference]: Start difference. First operand 301 states and 413 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-10-15 16:23:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:53,969 INFO L93 Difference]: Finished difference Result 479 states and 666 transitions. [2022-10-15 16:23:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 16:23:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 64 [2022-10-15 16:23:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:53,973 INFO L225 Difference]: With dead ends: 479 [2022-10-15 16:23:53,973 INFO L226 Difference]: Without dead ends: 479 [2022-10-15 16:23:53,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-10-15 16:23:53,974 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 159 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:53,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 52 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 167 Invalid, 0 Unknown, 3 Unchecked, 0.2s Time] [2022-10-15 16:23:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-10-15 16:23:53,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 311. [2022-10-15 16:23:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 302 states have (on average 1.403973509933775) internal successors, (424), 310 states have internal predecessors, (424), 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) [2022-10-15 16:23:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 424 transitions. [2022-10-15 16:23:53,990 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 424 transitions. Word has length 64 [2022-10-15 16:23:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:53,991 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 424 transitions. [2022-10-15 16:23:53,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2022-10-15 16:23:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 424 transitions. [2022-10-15 16:23:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-15 16:23:53,993 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:53,994 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:54,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:54,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:54,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:54,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1347739714, now seen corresponding path program 1 times [2022-10-15 16:23:54,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:54,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409282363] [2022-10-15 16:23:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:54,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:54,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586734672] [2022-10-15 16:23:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:54,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:54,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:54,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:54,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 16:23:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 16:23:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:23:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:55,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:55,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409282363] [2022-10-15 16:23:55,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:55,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586734672] [2022-10-15 16:23:55,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586734672] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:23:55,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:23:55,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-10-15 16:23:55,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809652081] [2022-10-15 16:23:55,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:23:55,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-15 16:23:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:55,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-15 16:23:55,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-10-15 16:23:55,169 INFO L87 Difference]: Start difference. First operand 311 states and 424 transitions. Second operand has 34 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 34 states have internal predecessors, (126), 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) [2022-10-15 16:23:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:56,875 INFO L93 Difference]: Finished difference Result 872 states and 885 transitions. [2022-10-15 16:23:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-15 16:23:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 34 states have internal predecessors, (126), 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 67 [2022-10-15 16:23:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:56,893 INFO L225 Difference]: With dead ends: 872 [2022-10-15 16:23:56,893 INFO L226 Difference]: Without dead ends: 872 [2022-10-15 16:23:56,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2022-10-15 16:23:56,896 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2405 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:56,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2405 Valid, 279 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-15 16:23:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-10-15 16:23:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 615. [2022-10-15 16:23:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 606 states have (on average 1.4125412541254125) internal successors, (856), 614 states have internal predecessors, (856), 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) [2022-10-15 16:23:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 856 transitions. [2022-10-15 16:23:56,914 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 856 transitions. Word has length 67 [2022-10-15 16:23:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:56,915 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 856 transitions. [2022-10-15 16:23:56,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.7058823529411766) internal successors, (126), 34 states have internal predecessors, (126), 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) [2022-10-15 16:23:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 856 transitions. [2022-10-15 16:23:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-10-15 16:23:56,920 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:56,920 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:56,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:57,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:57,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1734197134, now seen corresponding path program 2 times [2022-10-15 16:23:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217137976] [2022-10-15 16:23:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:57,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148037846] [2022-10-15 16:23:57,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:23:57,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:57,209 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:57,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 16:23:57,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:23:57,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:23:57,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:23:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:57,344 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-15 16:23:57,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-15 16:23:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-10-15 16:23:57,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:23:57,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:23:57,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217137976] [2022-10-15 16:23:57,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:23:57,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148037846] [2022-10-15 16:23:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148037846] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:23:57,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:23:57,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:23:57,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159337396] [2022-10-15 16:23:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:23:57,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:23:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:23:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:23:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:23:57,619 INFO L87 Difference]: Start difference. First operand 615 states and 856 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-10-15 16:23:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:23:57,647 INFO L93 Difference]: Finished difference Result 613 states and 793 transitions. [2022-10-15 16:23:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:23:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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 131 [2022-10-15 16:23:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:23:57,654 INFO L225 Difference]: With dead ends: 613 [2022-10-15 16:23:57,654 INFO L226 Difference]: Without dead ends: 613 [2022-10-15 16:23:57,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:23:57,656 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 16:23:57,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 16:23:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-10-15 16:23:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2022-10-15 16:23:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 606 states have (on average 1.3085808580858085) internal successors, (793), 612 states have internal predecessors, (793), 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) [2022-10-15 16:23:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 793 transitions. [2022-10-15 16:23:57,674 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 793 transitions. Word has length 131 [2022-10-15 16:23:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:23:57,676 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 793 transitions. [2022-10-15 16:23:57,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-10-15 16:23:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 793 transitions. [2022-10-15 16:23:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-10-15 16:23:57,690 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:23:57,690 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:23:57,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:23:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-15 16:23:57,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:23:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:23:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1734197133, now seen corresponding path program 1 times [2022-10-15 16:23:57,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:23:57,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446164916] [2022-10-15 16:23:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:57,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:23:57,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:23:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704303994] [2022-10-15 16:23:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:23:57,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:23:57,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:23:57,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:23:57,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 16:23:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:23:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-15 16:23:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:23:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:23:59,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:24:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446164916] [2022-10-15 16:24:01,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704303994] [2022-10-15 16:24:01,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704303994] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:24:01,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:24:01,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-10-15 16:24:01,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456276535] [2022-10-15 16:24:01,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-10-15 16:24:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-10-15 16:24:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-10-15 16:24:01,089 INFO L87 Difference]: Start difference. First operand 613 states and 793 transitions. Second operand has 66 states, 66 states have (on average 3.8484848484848486) internal successors, (254), 66 states have internal predecessors, (254), 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) [2022-10-15 16:24:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:08,269 INFO L93 Difference]: Finished difference Result 1644 states and 1654 transitions. [2022-10-15 16:24:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-10-15 16:24:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.8484848484848486) internal successors, (254), 66 states have internal predecessors, (254), 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 131 [2022-10-15 16:24:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:08,278 INFO L225 Difference]: With dead ends: 1644 [2022-10-15 16:24:08,278 INFO L226 Difference]: Without dead ends: 1644 [2022-10-15 16:24:08,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4129, Invalid=5183, Unknown=0, NotChecked=0, Total=9312 [2022-10-15 16:24:08,284 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4884 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4884 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:08,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4884 Valid, 452 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-10-15 16:24:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-10-15 16:24:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1221. [2022-10-15 16:24:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1214 states have (on average 1.312191103789127) internal successors, (1593), 1220 states have internal predecessors, (1593), 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) [2022-10-15 16:24:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1593 transitions. [2022-10-15 16:24:08,316 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1593 transitions. Word has length 131 [2022-10-15 16:24:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:08,316 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1593 transitions. [2022-10-15 16:24:08,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.8484848484848486) internal successors, (254), 66 states have internal predecessors, (254), 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) [2022-10-15 16:24:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1593 transitions. [2022-10-15 16:24:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-10-15 16:24:08,320 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:08,321 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:08,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 16:24:08,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:08,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:24:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash 535855315, now seen corresponding path program 2 times [2022-10-15 16:24:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438337311] [2022-10-15 16:24:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:08,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157438145] [2022-10-15 16:24:08,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:24:08,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:08,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:08,605 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:24:08,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 16:24:08,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 16:24:08,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:24:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:24:08,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:08,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-15 16:24:08,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-15 16:24:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7627 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7627 trivial. 0 not checked. [2022-10-15 16:24:12,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:24:12,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438337311] [2022-10-15 16:24:12,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:12,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157438145] [2022-10-15 16:24:12,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157438145] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:24:12,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:24:12,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 16:24:12,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427375072] [2022-10-15 16:24:12,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:24:12,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:24:12,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:24:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:24:12,121 INFO L87 Difference]: Start difference. First operand 1221 states and 1593 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-10-15 16:24:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:12,266 INFO L93 Difference]: Finished difference Result 1222 states and 1593 transitions. [2022-10-15 16:24:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:24:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 259 [2022-10-15 16:24:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:12,273 INFO L225 Difference]: With dead ends: 1222 [2022-10-15 16:24:12,274 INFO L226 Difference]: Without dead ends: 1222 [2022-10-15 16:24:12,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 16:24:12,275 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:12,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 57 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-10-15 16:24:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-10-15 16:24:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1221. [2022-10-15 16:24:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1214 states have (on average 1.3113673805601318) internal successors, (1592), 1220 states have internal predecessors, (1592), 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) [2022-10-15 16:24:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1592 transitions. [2022-10-15 16:24:12,301 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1592 transitions. Word has length 259 [2022-10-15 16:24:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:12,302 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1592 transitions. [2022-10-15 16:24:12,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-10-15 16:24:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1592 transitions. [2022-10-15 16:24:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-10-15 16:24:12,306 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:12,306 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:12,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 16:24:12,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-15 16:24:12,520 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-10-15 16:24:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -727753269, now seen corresponding path program 1 times [2022-10-15 16:24:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:12,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706730011] [2022-10-15 16:24:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:12,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236787237] [2022-10-15 16:24:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:12,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:12,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:12,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:24:12,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 16:24:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-15 16:24:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:24:15,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 16:24:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706730011] [2022-10-15 16:24:29,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:29,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236787237] [2022-10-15 16:24:29,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236787237] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:24:29,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:24:29,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 130 [2022-10-15 16:24:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465462893] [2022-10-15 16:24:29,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-10-15 16:24:29,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:29,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-10-15 16:24:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-10-15 16:24:29,924 INFO L87 Difference]: Start difference. First operand 1221 states and 1592 transitions. Second operand has 130 states, 130 states have (on average 3.9384615384615387) internal successors, (512), 130 states have internal predecessors, (512), 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)