./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/tcpy.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 23:02:18,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 23:02:18,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 23:02:18,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 23:02:18,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 23:02:18,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 23:02:18,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 23:02:18,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 23:02:18,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 23:02:18,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 23:02:18,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 23:02:18,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 23:02:18,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 23:02:18,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 23:02:18,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 23:02:18,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 23:02:18,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 23:02:18,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 23:02:18,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 23:02:18,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 23:02:18,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 23:02:18,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 23:02:18,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 23:02:18,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 23:02:18,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 23:02:18,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 23:02:18,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 23:02:18,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 23:02:18,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 23:02:18,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 23:02:18,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 23:02:18,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 23:02:18,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 23:02:18,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 23:02:18,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 23:02:18,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 23:02:18,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 23:02:18,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 23:02:18,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 23:02:18,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 23:02:18,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 23:02:18,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 23:02:19,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 23:02:19,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 23:02:19,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 23:02:19,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 23:02:19,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 23:02:19,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 23:02:19,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 23:02:19,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 23:02:19,012 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 23:02:19,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 23:02:19,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 23:02:19,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 23:02:19,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 23:02:19,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 23:02:19,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 23:02:19,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 23:02:19,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 23:02:19,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 23:02:19,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:02:19,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 23:02:19,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 23:02:19,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 23:02:19,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 [2021-12-16 23:02:19,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 23:02:19,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 23:02:19,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 23:02:19,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 23:02:19,251 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 23:02:19,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2021-12-16 23:02:19,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e529807/ef266ab0881c47ef834b88b7c03bdbea/FLAG786fcbe78 [2021-12-16 23:02:19,660 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 23:02:19,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2021-12-16 23:02:19,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e529807/ef266ab0881c47ef834b88b7c03bdbea/FLAG786fcbe78 [2021-12-16 23:02:19,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e529807/ef266ab0881c47ef834b88b7c03bdbea [2021-12-16 23:02:19,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 23:02:19,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 23:02:19,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 23:02:19,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 23:02:19,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 23:02:19,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dceaee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19, skipping insertion in model container [2021-12-16 23:02:19,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 23:02:19,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 23:02:19,832 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-tiling/tcpy.c[395,408] [2021-12-16 23:02:19,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:02:19,859 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 23:02:19,870 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-tiling/tcpy.c[395,408] [2021-12-16 23:02:19,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 23:02:19,892 INFO L208 MainTranslator]: Completed translation [2021-12-16 23:02:19,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19 WrapperNode [2021-12-16 23:02:19,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 23:02:19,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 23:02:19,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 23:02:19,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 23:02:19,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,929 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2021-12-16 23:02:19,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 23:02:19,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 23:02:19,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 23:02:19,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 23:02:19,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 23:02:19,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 23:02:19,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 23:02:19,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 23:02:19,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (1/1) ... [2021-12-16 23:02:19,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 23:02:19,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:19,990 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) [2021-12-16 23:02:20,009 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 [2021-12-16 23:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 23:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 23:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 23:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 23:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 23:02:20,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 23:02:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 23:02:20,077 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 23:02:20,078 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 23:02:20,246 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 23:02:20,249 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 23:02:20,250 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 23:02:20,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:02:20 BoogieIcfgContainer [2021-12-16 23:02:20,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 23:02:20,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 23:02:20,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 23:02:20,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 23:02:20,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 11:02:19" (1/3) ... [2021-12-16 23:02:20,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67abd10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:02:20, skipping insertion in model container [2021-12-16 23:02:20,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 11:02:19" (2/3) ... [2021-12-16 23:02:20,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67abd10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 11:02:20, skipping insertion in model container [2021-12-16 23:02:20,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 11:02:20" (3/3) ... [2021-12-16 23:02:20,256 INFO L111 eAbstractionObserver]: Analyzing ICFG tcpy.c [2021-12-16 23:02:20,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 23:02:20,260 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 23:02:20,315 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 23:02:20,321 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 23:02:20,322 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 23:02:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 23:02:20,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:20,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:20,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1608152958, now seen corresponding path program 1 times [2021-12-16 23:02:20,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:20,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175582060] [2021-12-16 23:02:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:20,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:20,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175582060] [2021-12-16 23:02:20,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175582060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:02:20,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:02:20,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 23:02:20,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361639803] [2021-12-16 23:02:20,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:02:20,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 23:02:20,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 23:02:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:02:20,490 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:20,500 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2021-12-16 23:02:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 23:02:20,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 23:02:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:20,506 INFO L225 Difference]: With dead ends: 37 [2021-12-16 23:02:20,506 INFO L226 Difference]: Without dead ends: 17 [2021-12-16 23:02:20,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 23:02:20,515 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:20,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:02:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-16 23:02:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-16 23:02:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-16 23:02:20,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-16 23:02:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:20,540 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-16 23:02:20,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-16 23:02:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 23:02:20,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:20,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:20,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 23:02:20,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:20,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1873320706, now seen corresponding path program 1 times [2021-12-16 23:02:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506203172] [2021-12-16 23:02:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:20,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:20,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506203172] [2021-12-16 23:02:20,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506203172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:02:20,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:02:20,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 23:02:20,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394707548] [2021-12-16 23:02:20,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:02:20,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 23:02:20,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 23:02:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:02:20,617 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:20,664 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-12-16 23:02:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 23:02:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 23:02:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:20,665 INFO L225 Difference]: With dead ends: 31 [2021-12-16 23:02:20,665 INFO L226 Difference]: Without dead ends: 19 [2021-12-16 23:02:20,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 23:02:20,666 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:20,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:02:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-16 23:02:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-12-16 23:02:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-12-16 23:02:20,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-12-16 23:02:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:20,670 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-12-16 23:02:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-12-16 23:02:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-16 23:02:20,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:20,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:20,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 23:02:20,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash -270521828, now seen corresponding path program 1 times [2021-12-16 23:02:20,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:20,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009402313] [2021-12-16 23:02:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:20,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:20,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:20,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009402313] [2021-12-16 23:02:20,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009402313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:20,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324187777] [2021-12-16 23:02:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:20,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:20,758 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) [2021-12-16 23:02:20,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 23:02:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 23:02:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:20,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:20,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324187777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:20,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:20,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 23:02:20,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122160960] [2021-12-16 23:02:20,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:20,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 23:02:20,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 23:02:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:02:20,934 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:20,972 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-12-16 23:02:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 23:02:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-16 23:02:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:20,973 INFO L225 Difference]: With dead ends: 33 [2021-12-16 23:02:20,973 INFO L226 Difference]: Without dead ends: 21 [2021-12-16 23:02:20,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-16 23:02:20,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:20,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:02:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-16 23:02:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-12-16 23:02:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-16 23:02:20,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2021-12-16 23:02:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:20,978 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-16 23:02:20,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-16 23:02:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 23:02:20,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:20,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:21,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 23:02:21,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:21,200 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1874059334, now seen corresponding path program 2 times [2021-12-16 23:02:21,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:21,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681740147] [2021-12-16 23:02:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:21,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 23:02:21,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681740147] [2021-12-16 23:02:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681740147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 23:02:21,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 23:02:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 23:02:21,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857379932] [2021-12-16 23:02:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 23:02:21,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 23:02:21,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 23:02:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:02:21,372 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:21,408 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-16 23:02:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 23:02:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 23:02:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:21,410 INFO L225 Difference]: With dead ends: 35 [2021-12-16 23:02:21,410 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 23:02:21,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 23:02:21,411 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:21,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 23:02:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 23:02:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-12-16 23:02:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-12-16 23:02:21,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-12-16 23:02:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:21,415 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-12-16 23:02:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-12-16 23:02:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 23:02:21,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:21,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:21,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 23:02:21,417 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash 265660728, now seen corresponding path program 1 times [2021-12-16 23:02:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677501170] [2021-12-16 23:02:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:21,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 23:02:21,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677501170] [2021-12-16 23:02:21,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677501170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629085738] [2021-12-16 23:02:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:21,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:21,585 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) [2021-12-16 23:02:21,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 23:02:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:21,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 23:02:21,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 23:02:21,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 23:02:21,737 INFO L354 Elim1Store]: treesize reduction 26, result has 40.9 percent of original size [2021-12-16 23:02:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 33 [2021-12-16 23:02:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 23:02:21,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:21,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:02:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 418 treesize of output 394 [2021-12-16 23:02:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 350 [2021-12-16 23:02:22,951 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-16 23:02:22,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2021-12-16 23:02:23,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:02:23,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 376 [2021-12-16 23:02:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 23:02:23,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629085738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:02:23,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:02:23,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-12-16 23:02:23,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589199906] [2021-12-16 23:02:23,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:02:23,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 23:02:23,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:02:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 23:02:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-16 23:02:23,617 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:02:23,716 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-16 23:02:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 23:02:23,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 23:02:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:02:23,717 INFO L225 Difference]: With dead ends: 29 [2021-12-16 23:02:23,717 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 23:02:23,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-16 23:02:23,718 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 23:02:23,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 23:02:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 23:02:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-12-16 23:02:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-16 23:02:23,721 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-12-16 23:02:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:02:23,722 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-16 23:02:23,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 23:02:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-16 23:02:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 23:02:23,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:02:23,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 23:02:23,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 23:02:23,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:23,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:02:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:02:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1994055598, now seen corresponding path program 1 times [2021-12-16 23:02:23,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:02:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671549267] [2021-12-16 23:02:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:23,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:02:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:24,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:02:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671549267] [2021-12-16 23:02:24,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671549267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:02:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055962456] [2021-12-16 23:02:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:02:24,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:02:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:02:24,403 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) [2021-12-16 23:02:24,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 23:02:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:02:24,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 23:02:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:02:24,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-16 23:02:24,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 23:02:24,639 INFO L354 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2021-12-16 23:02:24,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-16 23:02:24,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 23:02:24,798 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-16 23:02:24,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 23 [2021-12-16 23:02:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 23:02:24,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:02:26,871 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_103 Int) (|ULTIMATE.start_main_~acopy~0#1.offset| Int)) (let ((.cse0 (store (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| (- 4))) (.cse2 (* c_~SIZE~0 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~acopy~0#1.base|) (+ .cse1 |ULTIMATE.start_main_~acopy~0#1.offset| .cse2 (- 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 (- 4))))) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~acopy~0#1.offset|) v_ArrVal_103))) (= (select .cse0 (+ |ULTIMATE.start_main_~acopy~0#1.offset| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~acopy~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) is different from false [2021-12-16 23:02:28,908 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_103 Int) (|ULTIMATE.start_main_~acopy~0#1.offset| Int)) (let ((.cse0 (store (let ((.cse1 (* c_~SIZE~0 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~acopy~0#1.base|) (+ |ULTIMATE.start_main_~acopy~0#1.offset| .cse1 (- 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 4))))) |ULTIMATE.start_main_~acopy~0#1.offset| v_ArrVal_103))) (= (select .cse0 (+ |ULTIMATE.start_main_~acopy~0#1.offset| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~acopy~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) is different from false [2021-12-16 23:02:31,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:02:31,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2530 treesize of output 2071 [2021-12-16 23:02:31,054 INFO L354 Elim1Store]: treesize reduction 58, result has 52.5 percent of original size [2021-12-16 23:02:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 3343 treesize of output 3081 [2021-12-16 23:02:31,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 23:02:31,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3443 treesize of output 3223 Killed by 15