/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-patterns/array18_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:24:35,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:24:35,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:24:35,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:24:35,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:24:35,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:24:35,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:24:35,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:24:35,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:24:35,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:24:35,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:24:35,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:24:35,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:24:35,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:24:35,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:24:35,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:24:35,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:24:35,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:24:35,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:24:35,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:24:35,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:24:35,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:24:35,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:24:35,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:24:35,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 16:24:35,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 16:24:35,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 16:24:35,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 16:24:35,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 16:24:35,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 16:24:35,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:24:35,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:24:35,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:24:35,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:24:35,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:24:35,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:24:35,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:24:35,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:24:35,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:24:35,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:24:35,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:24:35,395 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 16:24:35,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:24:35,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:24:35,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:24:35,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:24:35,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:24:35,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:24:35,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:24:35,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:24:35,427 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:24:35,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:24:35,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:24:35,427 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:24:35,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:24:35,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:24:35,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:24:35,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:24:35,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:24:35,428 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:24:35,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:24:35,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:24:35,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:24:35,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:24:35,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:24:35,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:24:35,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:24:35,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:24:35,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:24:35,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:24:35,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:24:35,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:24:35,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:24:35,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:24:35,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:24:35,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:24:35,850 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:24:35,850 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:24:35,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array18_pattern.c [2022-10-15 16:24:35,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125a97d0a/035a7ff9180f4346a8d863cb0920e88c/FLAG42f15c968 [2022-10-15 16:24:36,456 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:24:36,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array18_pattern.c [2022-10-15 16:24:36,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125a97d0a/035a7ff9180f4346a8d863cb0920e88c/FLAG42f15c968 [2022-10-15 16:24:36,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125a97d0a/035a7ff9180f4346a8d863cb0920e88c [2022-10-15 16:24:36,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:24:36,824 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:24:36,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:24:36,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:24:36,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:24:36,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@207a8e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36, skipping insertion in model container [2022-10-15 16:24:36,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:24:36,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:24:37,013 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-patterns/array18_pattern.c[1444,1457] [2022-10-15 16:24:37,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:24:37,050 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:24:37,064 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-patterns/array18_pattern.c[1444,1457] [2022-10-15 16:24:37,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:24:37,092 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:24:37,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37 WrapperNode [2022-10-15 16:24:37,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:24:37,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:24:37,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:24:37,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:24:37,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,140 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-10-15 16:24:37,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:24:37,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:24:37,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:24:37,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:24:37,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,175 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:24:37,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:24:37,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:24:37,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:24:37,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (1/1) ... [2022-10-15 16:24:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:24:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:37,235 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 16:24:37,257 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 16:24:37,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:24:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 16:24:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 16:24:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:24:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:24:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:24:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:24:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:24:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:24:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:24:37,391 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:24:37,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:24:37,895 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:24:37,913 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:24:37,914 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-15 16:24:37,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:24:37 BoogieIcfgContainer [2022-10-15 16:24:37,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:24:37,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:24:37,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:24:37,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:24:37,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:24:36" (1/3) ... [2022-10-15 16:24:37,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e70750d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:24:37, skipping insertion in model container [2022-10-15 16:24:37,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:37" (2/3) ... [2022-10-15 16:24:37,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e70750d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:24:37, skipping insertion in model container [2022-10-15 16:24:37,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:24:37" (3/3) ... [2022-10-15 16:24:37,943 INFO L112 eAbstractionObserver]: Analyzing ICFG array18_pattern.c [2022-10-15 16:24:37,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:24:37,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-15 16:24:38,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:24:38,034 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;@7840745f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:24:38,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-15 16:24:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 50 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:24:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:24:38,051 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:38,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:38,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:24:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1132620882, now seen corresponding path program 1 times [2022-10-15 16:24:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:38,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749418017] [2022-10-15 16:24:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:38,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359849898] [2022-10-15 16:24:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:38,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:38,245 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 16:24:38,262 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 16:24:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:24:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:38,436 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 16:24:38,452 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 16:24:38,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:24:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749418017] [2022-10-15 16:24:38,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359849898] [2022-10-15 16:24:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359849898] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:24:38,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:24:38,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:24:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591656045] [2022-10-15 16:24:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:24:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:24:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:24:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:24:38,499 INFO L87 Difference]: Start difference. First operand has 55 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 50 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:38,583 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-10-15 16:24:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:24:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-15 16:24:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:38,594 INFO L225 Difference]: With dead ends: 49 [2022-10-15 16:24:38,595 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 16:24:38,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 16:24:38,601 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 39 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:38,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:24:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 16:24:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-15 16:24:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.4) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 16:24:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-10-15 16:24:38,645 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2022-10-15 16:24:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:38,647 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-10-15 16:24:38,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-10-15 16:24:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:24:38,649 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:38,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:38,676 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 16:24:38,855 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 16:24:38,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:24:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:38,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1132620883, now seen corresponding path program 1 times [2022-10-15 16:24:38,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:38,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194384886] [2022-10-15 16:24:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:38,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:38,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148930075] [2022-10-15 16:24:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:38,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:38,878 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 16:24:38,894 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 16:24:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 16:24:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:39,027 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 16:24:39,157 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 16:24:39,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:24:39,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194384886] [2022-10-15 16:24:39,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148930075] [2022-10-15 16:24:39,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148930075] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:24:39,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:24:39,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:24:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334556188] [2022-10-15 16:24:39,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:24:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:24:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:24:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:24:39,162 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:39,516 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2022-10-15 16:24:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:24:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-15 16:24:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:39,519 INFO L225 Difference]: With dead ends: 91 [2022-10-15 16:24:39,519 INFO L226 Difference]: Without dead ends: 91 [2022-10-15 16:24:39,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:24:39,521 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 95 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:39,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 87 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:24:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-15 16:24:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-10-15 16:24:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 61 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:24:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-10-15 16:24:39,537 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 11 [2022-10-15 16:24:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:39,537 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-10-15 16:24:39,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-10-15 16:24:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 16:24:39,539 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:39,539 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:39,574 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 16:24:39,752 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 16:24:39,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:24:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 645613163, now seen corresponding path program 1 times [2022-10-15 16:24:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:39,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523593000] [2022-10-15 16:24:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:39,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235289660] [2022-10-15 16:24:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:39,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:39,773 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 16:24:39,795 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 16:24:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 16:24:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:39,956 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 16:24:41,273 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 16:24:41,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:53,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:53,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523593000] [2022-10-15 16:24:53,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235289660] [2022-10-15 16:24:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235289660] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:24:53,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:24:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-10-15 16:24:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113930143] [2022-10-15 16:24:53,011 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:24:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:24:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=120, Unknown=1, NotChecked=0, Total=182 [2022-10-15 16:24:53,013 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:54,311 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2022-10-15 16:24:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:24:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-10-15 16:24:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:54,315 INFO L225 Difference]: With dead ends: 100 [2022-10-15 16:24:54,315 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 16:24:54,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=61, Invalid=120, Unknown=1, NotChecked=0, Total=182 [2022-10-15 16:24:54,318 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 132 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:54,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 120 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-15 16:24:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 16:24:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2022-10-15 16:24:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 68 states have internal predecessors, (86), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:24:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-10-15 16:24:54,331 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 14 [2022-10-15 16:24:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:54,331 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-10-15 16:24:54,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-10-15 16:24:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 16:24:54,333 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:54,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:54,341 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 16:24:54,537 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 16:24:54,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:24:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 596531324, now seen corresponding path program 1 times [2022-10-15 16:24:54,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:54,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832941282] [2022-10-15 16:24:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:54,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962533083] [2022-10-15 16:24:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:54,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:54,563 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 16:24:54,590 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 16:24:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:24:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:24:54,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:24:54,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832941282] [2022-10-15 16:24:54,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962533083] [2022-10-15 16:24:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962533083] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:24:54,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:24:54,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-10-15 16:24:54,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047191560] [2022-10-15 16:24:54,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:24:54,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:24:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:24:54,726 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:55,091 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2022-10-15 16:24:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:24:55,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-15 16:24:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:55,094 INFO L225 Difference]: With dead ends: 186 [2022-10-15 16:24:55,094 INFO L226 Difference]: Without dead ends: 186 [2022-10-15 16:24:55,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2022-10-15 16:24:55,097 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 390 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:55,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 235 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:24:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-10-15 16:24:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 108. [2022-10-15 16:24:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 99 states have internal predecessors, (133), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-15 16:24:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2022-10-15 16:24:55,115 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 17 [2022-10-15 16:24:55,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:55,115 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2022-10-15 16:24:55,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:24:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2022-10-15 16:24:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 16:24:55,117 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:55,117 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:55,156 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 16:24:55,330 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 16:24:55,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:24:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:55,332 INFO L85 PathProgramCache]: Analyzing trace with hash 598152531, now seen corresponding path program 2 times [2022-10-15 16:24:55,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:55,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725874219] [2022-10-15 16:24:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:55,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:55,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970017518] [2022-10-15 16:24:55,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:24:55,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:55,358 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 16:24:55,372 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 16:24:55,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:24:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:24:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 16:24:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:55,472 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 16:24:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:24:56,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:16,498 WARN L233 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 21 DAG size of output: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-15 16:25:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:22,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:22,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725874219] [2022-10-15 16:25:22,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:22,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970017518] [2022-10-15 16:25:22,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970017518] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:22,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:22,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-10-15 16:25:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433002547] [2022-10-15 16:25:22,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 16:25:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 16:25:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=138, Unknown=3, NotChecked=0, Total=210 [2022-10-15 16:25:22,096 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:25:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:27,692 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2022-10-15 16:25:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 16:25:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-10-15 16:25:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:27,695 INFO L225 Difference]: With dead ends: 248 [2022-10-15 16:25:27,695 INFO L226 Difference]: Without dead ends: 248 [2022-10-15 16:25:27,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=327, Invalid=600, Unknown=3, NotChecked=0, Total=930 [2022-10-15 16:25:27,699 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 552 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:27,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 225 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-15 16:25:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-10-15 16:25:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 135. [2022-10-15 16:25:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.4621848739495797) internal successors, (174), 126 states have internal predecessors, (174), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-15 16:25:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2022-10-15 16:25:27,718 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 188 transitions. Word has length 17 [2022-10-15 16:25:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:27,718 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 188 transitions. [2022-10-15 16:25:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 16:25:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 188 transitions. [2022-10-15 16:25:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 16:25:27,720 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:27,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:27,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-15 16:25:27,931 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 16:25:27,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1341011496, now seen corresponding path program 1 times [2022-10-15 16:25:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:27,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061156351] [2022-10-15 16:25:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:27,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:27,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:27,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642577511] [2022-10-15 16:25:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:27,954 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 16:25:27,955 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 16:25:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 16:25:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 16:25:28,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:28,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061156351] [2022-10-15 16:25:28,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642577511] [2022-10-15 16:25:28,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642577511] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:28,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:28,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 16:25:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654784540] [2022-10-15 16:25:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:28,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:25:28,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:25:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:25:28,030 INFO L87 Difference]: Start difference. First operand 135 states and 188 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-15 16:25:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:28,197 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2022-10-15 16:25:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:25:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-10-15 16:25:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:28,200 INFO L225 Difference]: With dead ends: 116 [2022-10-15 16:25:28,200 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 16:25:28,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-10-15 16:25:28,202 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:28,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 101 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 16:25:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 16:25:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2022-10-15 16:25:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 88 states have (on average 1.4204545454545454) internal successors, (125), 95 states have internal predecessors, (125), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2022-10-15 16:25:28,213 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 22 [2022-10-15 16:25:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:28,214 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2022-10-15 16:25:28,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-15 16:25:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2022-10-15 16:25:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 16:25:28,215 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:28,215 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:28,248 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 16:25:28,427 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 16:25:28,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -258916204, now seen corresponding path program 2 times [2022-10-15 16:25:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:28,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940396195] [2022-10-15 16:25:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:28,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:28,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102068650] [2022-10-15 16:25:28,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:25:28,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:28,444 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 16:25:28,465 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 16:25:28,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:25:28,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:25:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:25:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:28,560 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 16:25:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 16:25:29,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940396195] [2022-10-15 16:25:38,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102068650] [2022-10-15 16:25:38,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102068650] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:25:38,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:25:38,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2022-10-15 16:25:38,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450290063] [2022-10-15 16:25:38,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:38,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:25:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:25:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:38,098 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:38,428 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2022-10-15 16:25:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:25:38,429 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-10-15 16:25:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:38,434 INFO L225 Difference]: With dead ends: 116 [2022-10-15 16:25:38,434 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 16:25:38,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:38,435 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:38,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 78 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 16:25:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 16:25:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-10-15 16:25:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 97 states have internal predecessors, (123), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-15 16:25:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-10-15 16:25:38,454 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 20 [2022-10-15 16:25:38,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:38,458 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-10-15 16:25:38,458 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-15 16:25:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-10-15 16:25:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 16:25:38,459 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:38,459 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:38,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-15 16:25:38,660 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 16:25:38,661 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 388595338, now seen corresponding path program 3 times [2022-10-15 16:25:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:38,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692502737] [2022-10-15 16:25:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:38,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085602530] [2022-10-15 16:25:38,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:25:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:38,680 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 16:25:38,680 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 16:25:38,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:25:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:25:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 16:25:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:38,762 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 16:25:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 16:25:39,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-15 16:25:41,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692502737] [2022-10-15 16:25:41,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:41,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085602530] [2022-10-15 16:25:41,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085602530] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:41,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:41,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-10-15 16:25:41,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718148866] [2022-10-15 16:25:41,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:41,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:25:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:41,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:25:41,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:25:41,427 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)