/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/array17_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 16:24:34,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 16:24:34,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 16:24:34,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 16:24:34,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 16:24:34,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 16:24:34,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 16:24:34,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 16:24:34,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 16:24:34,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 16:24:34,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 16:24:34,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 16:24:34,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 16:24:34,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 16:24:34,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 16:24:34,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 16:24:34,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 16:24:34,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 16:24:34,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 16:24:34,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 16:24:34,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 16:24:34,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 16:24:34,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 16:24:34,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 16:24:34,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 16:24:34,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 16:24:34,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 16:24:34,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 16:24:34,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 16:24:34,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 16:24:34,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 16:24:34,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 16:24:34,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 16:24:34,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 16:24:34,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 16:24:34,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 16:24:34,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 16:24:34,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 16:24:34,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 16:24:34,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 16:24:34,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 16:24:34,909 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 16:24:34,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 16:24:34,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 16:24:34,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 16:24:34,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 16:24:34,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 16:24:34,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 16:24:34,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 16:24:34,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 16:24:34,942 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 16:24:34,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 16:24:34,943 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 16:24:34,943 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 16:24:34,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 16:24:34,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 16:24:34,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 16:24:34,944 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 16:24:34,944 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 16:24:34,944 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 16:24:34,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 16:24:34,944 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 16:24:34,945 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 16:24:34,945 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 16:24:34,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 16:24:34,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 16:24:34,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 16:24:34,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:24:34,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 16:24:34,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 16:24:34,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 16:24:34,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 16:24:34,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 16:24:35,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 16:24:35,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 16:24:35,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 16:24:35,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 16:24:35,399 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 16:24:35,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array17_pattern.c [2022-10-15 16:24:35,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e678a526/791e6fb887294135b4a0ddc6343f1cad/FLAG654bb6974 [2022-10-15 16:24:36,120 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 16:24:36,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array17_pattern.c [2022-10-15 16:24:36,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e678a526/791e6fb887294135b4a0ddc6343f1cad/FLAG654bb6974 [2022-10-15 16:24:36,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e678a526/791e6fb887294135b4a0ddc6343f1cad [2022-10-15 16:24:36,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 16:24:36,521 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 16:24:36,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 16:24:36,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 16:24:36,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 16:24:36,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d221164 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 16:24:36,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 16:24:36,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 16:24:36,709 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/array17_pattern.c[1441,1454] [2022-10-15 16:24:36,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:24:36,745 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 16:24:36,764 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/array17_pattern.c[1441,1454] [2022-10-15 16:24:36,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 16:24:36,792 INFO L208 MainTranslator]: Completed translation [2022-10-15 16:24:36,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36 WrapperNode [2022-10-15 16:24:36,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 16:24:36,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 16:24:36,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 16:24:36,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 16:24:36,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,840 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-10-15 16:24:36,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 16:24:36,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 16:24:36,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 16:24:36,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 16:24:36,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,869 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 16:24:36,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 16:24:36,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 16:24:36,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 16:24:36,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (1/1) ... [2022-10-15 16:24:36,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 16:24:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:36,916 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 16:24:36,929 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 16:24:36,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 16:24:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 16:24:36,983 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 16:24:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 16:24:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 16:24:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 16:24:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 16:24:36,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 16:24:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 16:24:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 16:24:37,097 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 16:24:37,099 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 16:24:37,676 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 16:24:37,685 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 16:24:37,685 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-15 16:24:37,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:24:37 BoogieIcfgContainer [2022-10-15 16:24:37,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 16:24:37,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 16:24:37,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 16:24:37,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 16:24:37,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:24:36" (1/3) ... [2022-10-15 16:24:37,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72688dc 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 16:24:37,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:36" (2/3) ... [2022-10-15 16:24:37,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72688dc 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 16:24:37,696 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 16:24:37,697 INFO L112 eAbstractionObserver]: Analyzing ICFG array17_pattern.c [2022-10-15 16:24:37,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 16:24:37,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-10-15 16:24:37,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 16:24:37,780 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;@6d156a17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 16:24:37,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-10-15 16:24:37,785 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 16:24:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:24:37,794 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:37,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:37,795 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 16:24:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1132620882, now seen corresponding path program 1 times [2022-10-15 16:24:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:37,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691186017] [2022-10-15 16:24:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:37,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805885446] [2022-10-15 16:24:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:37,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:37,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:37,923 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 16:24:37,940 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 16:24:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:38,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 16:24:38,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:38,090 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 16:24:38,108 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 16:24:38,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:24:38,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691186017] [2022-10-15 16:24:38,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805885446] [2022-10-15 16:24:38,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805885446] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:24:38,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:24:38,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 16:24:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454726345] [2022-10-15 16:24:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:24:38,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 16:24:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:38,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 16:24:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 16:24:38,156 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 16:24:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:38,248 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-10-15 16:24:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 16:24:38,251 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 16:24:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:38,267 INFO L225 Difference]: With dead ends: 49 [2022-10-15 16:24:38,267 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 16:24:38,274 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 16:24:38,281 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 16:24:38,284 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 16:24:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 16:24:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-15 16:24:38,334 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 16:24:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-10-15 16:24:38,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2022-10-15 16:24:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:38,339 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-10-15 16:24:38,339 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 16:24:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-10-15 16:24:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 16:24:38,341 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:38,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:38,369 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 16:24:38,552 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 16:24:38,556 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 16:24:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1132620883, now seen corresponding path program 1 times [2022-10-15 16:24:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:38,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362813663] [2022-10-15 16:24:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:38,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:38,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194403788] [2022-10-15 16:24:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:38,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:38,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:38,605 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 16:24:38,619 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 16:24:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 16:24:38,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:38,758 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 16:24:38,918 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 16:24:38,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:24:38,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362813663] [2022-10-15 16:24:38,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194403788] [2022-10-15 16:24:38,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194403788] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:24:38,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:24:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 16:24:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727650761] [2022-10-15 16:24:38,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:24:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 16:24:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 16:24:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 16:24:38,923 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 16:24:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:39,159 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2022-10-15 16:24:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 16:24:39,160 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 16:24:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:39,162 INFO L225 Difference]: With dead ends: 91 [2022-10-15 16:24:39,162 INFO L226 Difference]: Without dead ends: 91 [2022-10-15 16:24:39,163 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 16:24:39,164 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 95 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:39,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 87 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:24:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-15 16:24:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-10-15 16:24:39,177 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 16:24:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-10-15 16:24:39,180 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 11 [2022-10-15 16:24:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:39,180 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-10-15 16:24:39,180 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 16:24:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-10-15 16:24:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 16:24:39,182 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:39,182 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:39,218 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 16:24:39,397 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 16:24:39,398 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 16:24:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash 645613163, now seen corresponding path program 1 times [2022-10-15 16:24:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962614760] [2022-10-15 16:24:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:39,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:39,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029809897] [2022-10-15 16:24:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:39,418 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 16:24:39,435 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 16:24:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:39,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 16:24:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:39,564 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 16:24:41,353 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 16:24:41,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:48,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:48,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962614760] [2022-10-15 16:24:48,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:48,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029809897] [2022-10-15 16:24:48,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029809897] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:24:48,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:24:48,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-10-15 16:24:48,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922010228] [2022-10-15 16:24:48,605 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 16:24:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 16:24:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:24:48,607 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 16:24:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:49,365 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2022-10-15 16:24:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:24:49,371 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 16:24:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:49,373 INFO L225 Difference]: With dead ends: 100 [2022-10-15 16:24:49,374 INFO L226 Difference]: Without dead ends: 100 [2022-10-15 16:24:49,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-10-15 16:24:49,376 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 132 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:49,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 120 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:24:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-10-15 16:24:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2022-10-15 16:24:49,396 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 16:24:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-10-15 16:24:49,400 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 14 [2022-10-15 16:24:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:49,401 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-10-15 16:24:49,401 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 16:24:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-10-15 16:24:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 16:24:49,402 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:49,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:49,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 16:24:49,606 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 16:24:49,607 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 16:24:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:49,608 INFO L85 PathProgramCache]: Analyzing trace with hash 596531324, now seen corresponding path program 1 times [2022-10-15 16:24:49,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:49,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456711572] [2022-10-15 16:24:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:49,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:49,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137121730] [2022-10-15 16:24:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:49,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:49,638 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 16:24:49,644 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 16:24:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:24:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-15 16:24:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:49,787 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 16:24:49,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:49,844 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 16:24:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:24:49,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456711572] [2022-10-15 16:24:49,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:24:49,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137121730] [2022-10-15 16:24:49,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137121730] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:24:49,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:24:49,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-10-15 16:24:49,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802335098] [2022-10-15 16:24:49,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:24:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 16:24:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:24:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 16:24:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:24:49,848 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 16:24:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:24:50,377 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2022-10-15 16:24:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 16:24:50,378 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 16:24:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:24:50,380 INFO L225 Difference]: With dead ends: 186 [2022-10-15 16:24:50,381 INFO L226 Difference]: Without dead ends: 186 [2022-10-15 16:24:50,381 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 16:24:50,383 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 390 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 16:24:50,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 235 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 16:24:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-10-15 16:24:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 108. [2022-10-15 16:24:50,397 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 16:24:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2022-10-15 16:24:50,400 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 17 [2022-10-15 16:24:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:24:50,400 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2022-10-15 16:24:50,400 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 16:24:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2022-10-15 16:24:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 16:24:50,401 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:24:50,402 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:24:50,440 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 16:24:50,616 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 16:24:50,617 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 16:24:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:24:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash 598152531, now seen corresponding path program 2 times [2022-10-15 16:24:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:24:50,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997726193] [2022-10-15 16:24:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:24:50,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:24:50,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:24:50,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808274666] [2022-10-15 16:24:50,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:24:50,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:24:50,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:24:50,634 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 16:24:50,656 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 16:24:50,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:24:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:24:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 16:24:50,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:24:50,739 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 16:24:51,660 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 16:24:51,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:24:58,591 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse0 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse1 (* (* .cse0 .cse0) 4))) (and (or (<= .cse0 2147483647) (<= (* .cse0 34359738368) (+ 73786976294838206452 .cse1))) (<= 12 .cse1)))) (not (< 2 c_~ARR_SIZE~0))) is different from true [2022-10-15 16:25:06,909 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse0 (* (* .cse1 .cse1) 4))) (and (<= 12 .cse0) (<= (* .cse1 34359738368) (+ 73786976294838206452 .cse0))))) (not (< 2 c_~ARR_SIZE~0))) is different from true [2022-10-15 16:25:06,924 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 16:25:06,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997726193] [2022-10-15 16:25:06,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:06,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808274666] [2022-10-15 16:25:06,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808274666] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:06,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:06,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2022-10-15 16:25:06,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982124275] [2022-10-15 16:25:06,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-15 16:25:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-15 16:25:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=123, Unknown=2, NotChecked=50, Total=240 [2022-10-15 16:25:06,928 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 16 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 16:25:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:15,823 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2022-10-15 16:25:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-15 16:25:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 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 16:25:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:15,827 INFO L225 Difference]: With dead ends: 248 [2022-10-15 16:25:15,827 INFO L226 Difference]: Without dead ends: 248 [2022-10-15 16:25:15,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=307, Invalid=569, Unknown=2, NotChecked=114, Total=992 [2022-10-15 16:25:15,829 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 404 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:15,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 322 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 589 Invalid, 0 Unknown, 256 Unchecked, 4.5s Time] [2022-10-15 16:25:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-10-15 16:25:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 135. [2022-10-15 16:25:15,846 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 16:25:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2022-10-15 16:25:15,848 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 188 transitions. Word has length 17 [2022-10-15 16:25:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:15,848 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 188 transitions. [2022-10-15 16:25:15,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 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 16:25:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 188 transitions. [2022-10-15 16:25:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-15 16:25:15,850 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:15,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:15,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:16,063 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 16:25:16,064 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 16:25:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1341011496, now seen corresponding path program 1 times [2022-10-15 16:25:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:16,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726556795] [2022-10-15 16:25:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:16,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:16,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:16,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080074124] [2022-10-15 16:25:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:16,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:16,080 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 16:25:16,083 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 16:25:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 16:25:16,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:16,160 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 16:25:16,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 16:25:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726556795] [2022-10-15 16:25:16,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080074124] [2022-10-15 16:25:16,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080074124] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 16:25:16,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 16:25:16,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-15 16:25:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100123639] [2022-10-15 16:25:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 16:25:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:25:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:25:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-15 16:25:16,164 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 16:25:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:16,365 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2022-10-15 16:25:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 16:25:16,366 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 16:25:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:16,367 INFO L225 Difference]: With dead ends: 116 [2022-10-15 16:25:16,367 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 16:25:16,368 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 16:25:16,369 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:16,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 101 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 16:25:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 16:25:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2022-10-15 16:25:16,378 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 16:25:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2022-10-15 16:25:16,380 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 22 [2022-10-15 16:25:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:16,381 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2022-10-15 16:25:16,381 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 16:25:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2022-10-15 16:25:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 16:25:16,382 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:16,382 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:16,422 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 16:25:16,596 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 16:25:16,597 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 16:25:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash -258916204, now seen corresponding path program 2 times [2022-10-15 16:25:16,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:16,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605647546] [2022-10-15 16:25:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:16,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:16,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:16,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914682912] [2022-10-15 16:25:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 16:25:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:16,616 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 16:25:16,620 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 16:25:16,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 16:25:16,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:25:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 16:25:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:16,703 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 16:25:17,689 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 16:25:17,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:28,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605647546] [2022-10-15 16:25:28,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914682912] [2022-10-15 16:25:28,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914682912] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:25:28,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:25:28,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2022-10-15 16:25:28,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765295218] [2022-10-15 16:25:28,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:28,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 16:25:28,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:28,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 16:25:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:28,495 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 16:25:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:29,240 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2022-10-15 16:25:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 16:25:29,241 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 16:25:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:29,242 INFO L225 Difference]: With dead ends: 116 [2022-10-15 16:25:29,242 INFO L226 Difference]: Without dead ends: 116 [2022-10-15 16:25:29,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-10-15 16:25:29,244 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 64 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 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, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:29,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 78 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 16:25:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-15 16:25:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-10-15 16:25:29,252 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 16:25:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-10-15 16:25:29,253 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 20 [2022-10-15 16:25:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:29,253 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-10-15 16:25:29,254 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 16:25:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-10-15 16:25:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 16:25:29,255 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:29,255 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:29,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:29,469 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 16:25:29,470 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 16:25:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash 388595338, now seen corresponding path program 3 times [2022-10-15 16:25:29,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:29,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368986146] [2022-10-15 16:25:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:29,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827936955] [2022-10-15 16:25:29,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 16:25:29,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:29,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:29,486 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 16:25:29,496 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 16:25:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 16:25:29,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 16:25:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 16:25:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:29,578 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 16:25:30,635 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 16:25:30,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:32,084 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 16:25:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368986146] [2022-10-15 16:25:32,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827936955] [2022-10-15 16:25:32,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827936955] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:32,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:32,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-10-15 16:25:32,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450253339] [2022-10-15 16:25:32,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:32,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 16:25:32,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:32,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 16:25:32,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-10-15 16:25:32,093 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) [2022-10-15 16:25:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:40,404 INFO L93 Difference]: Finished difference Result 255 states and 320 transitions. [2022-10-15 16:25:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-15 16:25:40,405 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 23 [2022-10-15 16:25:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:40,407 INFO L225 Difference]: With dead ends: 255 [2022-10-15 16:25:40,407 INFO L226 Difference]: Without dead ends: 255 [2022-10-15 16:25:40,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2022-10-15 16:25:40,409 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 300 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:40,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 151 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-15 16:25:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-10-15 16:25:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 213. [2022-10-15 16:25:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 194 states have (on average 1.365979381443299) internal successors, (265), 201 states have internal predecessors, (265), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-15 16:25:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 283 transitions. [2022-10-15 16:25:40,423 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 283 transitions. Word has length 23 [2022-10-15 16:25:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:40,424 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 283 transitions. [2022-10-15 16:25:40,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-10-15 16:25:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 283 transitions. [2022-10-15 16:25:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 16:25:40,426 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:40,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:40,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 16:25:40,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-15 16:25:40,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1964358049, now seen corresponding path program 1 times [2022-10-15 16:25:40,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:40,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980222185] [2022-10-15 16:25:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:40,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:40,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088470771] [2022-10-15 16:25:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:40,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:40,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 16:25:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-15 16:25:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 16:25:41,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:42,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980222185] [2022-10-15 16:25:42,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088470771] [2022-10-15 16:25:42,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088470771] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 16:25:42,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-15 16:25:42,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-10-15 16:25:42,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787994691] [2022-10-15 16:25:42,427 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:42,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-15 16:25:42,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-15 16:25:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-10-15 16:25:42,430 INFO L87 Difference]: Start difference. First operand 213 states and 283 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-15 16:25:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 16:25:43,150 INFO L93 Difference]: Finished difference Result 256 states and 322 transitions. [2022-10-15 16:25:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-15 16:25:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-10-15 16:25:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 16:25:43,161 INFO L225 Difference]: With dead ends: 256 [2022-10-15 16:25:43,161 INFO L226 Difference]: Without dead ends: 256 [2022-10-15 16:25:43,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-10-15 16:25:43,163 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 232 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 16:25:43,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 196 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2022-10-15 16:25:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-10-15 16:25:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 224. [2022-10-15 16:25:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 204 states have (on average 1.3431372549019607) internal successors, (274), 211 states have internal predecessors, (274), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-15 16:25:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 292 transitions. [2022-10-15 16:25:43,177 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 292 transitions. Word has length 28 [2022-10-15 16:25:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 16:25:43,177 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 292 transitions. [2022-10-15 16:25:43,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-15 16:25:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 292 transitions. [2022-10-15 16:25:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-15 16:25:43,179 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 16:25:43,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 16:25:43,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-15 16:25:43,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:43,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-10-15 16:25:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 16:25:43,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1964357992, now seen corresponding path program 1 times [2022-10-15 16:25:43,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 16:25:43,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657255533] [2022-10-15 16:25:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:43,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 16:25:43,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 16:25:43,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986497477] [2022-10-15 16:25:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 16:25:43,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 16:25:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 16:25:43,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 16:25:43,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 16:25:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 16:25:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-15 16:25:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 16:25:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 16:25:43,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 16:25:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 16:25:43,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 16:25:43,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657255533] [2022-10-15 16:25:43,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 16:25:43,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986497477] [2022-10-15 16:25:43,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986497477] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 16:25:43,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 16:25:43,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-10-15 16:25:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337039241] [2022-10-15 16:25:43,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 16:25:43,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 16:25:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 16:25:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 16:25:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-10-15 16:25:43,842 INFO L87 Difference]: Start difference. First operand 224 states and 292 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5)