./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-crafted/bor5.i -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 1a4987addfe5f74a2ffcc1ac07d342e5a630d26b982b6fa887540d0e2c4f5965 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:37:15,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:37:15,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:37:16,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:37:16,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:37:16,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:37:16,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:37:16,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:37:16,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:37:16,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:37:16,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:37:16,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:37:16,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:37:16,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:37:16,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:37:16,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:37:16,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:37:16,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:37:16,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:37:16,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:37:16,047 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:37:16,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:37:16,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:37:16,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:37:16,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:37:16,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:37:16,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:37:16,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:37:16,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:37:16,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:37:16,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:37:16,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:37:16,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:37:16,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:37:16,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:37:16,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:37:16,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:37:16,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:37:16,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:37:16,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:37:16,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:37:16,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:37:16,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:37:16,085 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:37:16,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:37:16,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:37:16,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:37:16,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:37:16,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:37:16,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:37:16,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:37:16,088 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:37:16,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:37:16,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:37:16,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:37:16,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:37:16,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:37:16,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:37:16,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:37:16,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:37:16,090 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:37:16,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:37:16,090 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:37:16,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:37:16,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:37:16,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:37:16,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:37:16,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:37:16,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:37:16,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:37:16,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:37:16,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:37:16,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:37:16,092 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:37:16,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:37:16,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:37:16,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a4987addfe5f74a2ffcc1ac07d342e5a630d26b982b6fa887540d0e2c4f5965 [2022-07-11 22:37:16,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:37:16,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:37:16,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:37:16,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:37:16,305 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:37:16,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor5.i [2022-07-11 22:37:16,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d836b515e/38a7f7eb26e6484c9a9f406cab69ecda/FLAG9820599f3 [2022-07-11 22:37:16,726 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:37:16,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor5.i [2022-07-11 22:37:16,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d836b515e/38a7f7eb26e6484c9a9f406cab69ecda/FLAG9820599f3 [2022-07-11 22:37:16,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d836b515e/38a7f7eb26e6484c9a9f406cab69ecda [2022-07-11 22:37:16,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:37:16,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:37:16,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:37:16,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:37:16,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:37:16,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b260a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16, skipping insertion in model container [2022-07-11 22:37:16,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:37:16,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:37:16,918 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-crafted/bor5.i[1364,1377] [2022-07-11 22:37:16,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:37:16,928 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:37:16,948 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-crafted/bor5.i[1364,1377] [2022-07-11 22:37:16,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:37:16,957 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:37:16,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16 WrapperNode [2022-07-11 22:37:16,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:37:16,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:37:16,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:37:16,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:37:16,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,981 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-11 22:37:16,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:37:16,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:37:16,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:37:16,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:37:16,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:16,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:37:16,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:37:17,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:37:17,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:37:17,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (1/1) ... [2022-07-11 22:37:17,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:37:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:37:17,032 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) [2022-07-11 22:37:17,034 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 [2022-07-11 22:37:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:37:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-07-11 22:37:17,059 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-07-11 22:37:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:37:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:37:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:37:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:37:17,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:37:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:37:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:37:17,107 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:37:17,108 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:37:17,267 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:37:17,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:37:17,272 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 22:37:17,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:37:17 BoogieIcfgContainer [2022-07-11 22:37:17,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:37:17,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:37:17,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:37:17,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:37:17,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:37:16" (1/3) ... [2022-07-11 22:37:17,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a52a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:37:17, skipping insertion in model container [2022-07-11 22:37:17,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:37:16" (2/3) ... [2022-07-11 22:37:17,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a52a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:37:17, skipping insertion in model container [2022-07-11 22:37:17,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:37:17" (3/3) ... [2022-07-11 22:37:17,287 INFO L111 eAbstractionObserver]: Analyzing ICFG bor5.i [2022-07-11 22:37:17,297 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:37:17,298 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:37:17,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:37:17,348 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=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3c501731, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9274ee4 [2022-07-11 22:37:17,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:37:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-07-11 22:37:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 22:37:17,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:37:17,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:37:17,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:37:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:37:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash -469479236, now seen corresponding path program 1 times [2022-07-11 22:37:17,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:37:17,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960668380] [2022-07-11 22:37:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:17,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:37:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-11 22:37:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-11 22:37:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 22:37:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:37:17,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:37:17,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960668380] [2022-07-11 22:37:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960668380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:37:17,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:37:17,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:37:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046071417] [2022-07-11 22:37:17,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:37:17,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:37:17,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:37:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:37:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:37:17,548 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:37:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:37:17,600 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-07-11 22:37:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:37:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-11 22:37:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:37:17,609 INFO L225 Difference]: With dead ends: 73 [2022-07-11 22:37:17,609 INFO L226 Difference]: Without dead ends: 40 [2022-07-11 22:37:17,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:37:17,619 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:37:17,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:37:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-11 22:37:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2022-07-11 22:37:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2022-07-11 22:37:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-11 22:37:17,651 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 29 [2022-07-11 22:37:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:37:17,651 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-11 22:37:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:37:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-11 22:37:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 22:37:17,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:37:17,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:37:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:37:17,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:37:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:37:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1932942338, now seen corresponding path program 1 times [2022-07-11 22:37:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:37:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11822870] [2022-07-11 22:37:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:37:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-11 22:37:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:37:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 22:37:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 22:37:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:37:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11822870] [2022-07-11 22:37:17,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11822870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:37:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858639114] [2022-07-11 22:37:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:17,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:37:17,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:37:17,801 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) [2022-07-11 22:37:17,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:37:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:37:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:37:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:37:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:37:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:37:17,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858639114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:37:17,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:37:17,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-07-11 22:37:17,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569876734] [2022-07-11 22:37:17,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:37:17,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 22:37:17,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:37:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 22:37:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-11 22:37:17,971 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-11 22:37:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:37:18,048 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-07-11 22:37:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 22:37:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2022-07-11 22:37:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:37:18,050 INFO L225 Difference]: With dead ends: 74 [2022-07-11 22:37:18,050 INFO L226 Difference]: Without dead ends: 51 [2022-07-11 22:37:18,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:37:18,054 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:37:18,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 108 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:37:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-11 22:37:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2022-07-11 22:37:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2022-07-11 22:37:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-07-11 22:37:18,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 31 [2022-07-11 22:37:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:37:18,067 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-07-11 22:37:18,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-11 22:37:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-07-11 22:37:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 22:37:18,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:37:18,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:37:18,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:37:18,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:37:18,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:37:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:37:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1452282271, now seen corresponding path program 1 times [2022-07-11 22:37:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:37:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110876531] [2022-07-11 22:37:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:37:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 22:37:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:37:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-11 22:37:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 22:37:18,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:37:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110876531] [2022-07-11 22:37:18,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110876531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:37:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745043390] [2022-07-11 22:37:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:37:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:37:18,399 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) [2022-07-11 22:37:18,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:37:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:37:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:37:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:37:18,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:37:18,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745043390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:37:18,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:37:18,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-07-11 22:37:18,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619135535] [2022-07-11 22:37:18,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:37:18,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:37:18,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:37:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:37:18,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:37:18,511 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-11 22:37:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:37:18,546 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-07-11 22:37:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:37:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 45 [2022-07-11 22:37:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:37:18,550 INFO L225 Difference]: With dead ends: 52 [2022-07-11 22:37:18,550 INFO L226 Difference]: Without dead ends: 34 [2022-07-11 22:37:18,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:37:18,554 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:37:18,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:37:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-11 22:37:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-11 22:37:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2022-07-11 22:37:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-11 22:37:18,565 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 45 [2022-07-11 22:37:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:37:18,566 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-11 22:37:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-07-11 22:37:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-11 22:37:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:37:18,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:37:18,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:37:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:37:18,787 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,SelfDestructingSolverStorable2 [2022-07-11 22:37:18,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:37:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:37:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1430162787, now seen corresponding path program 1 times [2022-07-11 22:37:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:37:18,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434917586] [2022-07-11 22:37:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:37:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 22:37:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:37:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 22:37:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 22:37:19,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:37:19,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434917586] [2022-07-11 22:37:19,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434917586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:37:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815948752] [2022-07-11 22:37:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:19,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:37:19,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:37:19,233 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) [2022-07-11 22:37:19,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:37:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 22:37:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:37:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-11 22:37:19,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:37:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-11 22:37:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815948752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:37:19,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:37:19,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 16 [2022-07-11 22:37:19,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367357089] [2022-07-11 22:37:19,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:37:19,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 22:37:19,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:37:19,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 22:37:19,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-11 22:37:19,809 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-11 22:37:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:37:19,986 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2022-07-11 22:37:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 22:37:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2022-07-11 22:37:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:37:19,988 INFO L225 Difference]: With dead ends: 121 [2022-07-11 22:37:19,988 INFO L226 Difference]: Without dead ends: 95 [2022-07-11 22:37:19,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:37:19,989 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 75 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:37:19,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 391 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:37:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-11 22:37:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2022-07-11 22:37:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-11 22:37:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-07-11 22:37:20,004 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 47 [2022-07-11 22:37:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:37:20,005 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-07-11 22:37:20,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-11 22:37:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-07-11 22:37:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 22:37:20,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:37:20,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:37:20,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:37:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:37:20,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:37:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:37:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1484367723, now seen corresponding path program 1 times [2022-07-11 22:37:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:37:20,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031043047] [2022-07-11 22:37:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:37:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 22:37:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:37:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:20,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 22:37:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:37:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:37:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031043047] [2022-07-11 22:37:20,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031043047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:37:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746412069] [2022-07-11 22:37:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:37:20,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:37:20,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:37:20,984 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) [2022-07-11 22:37:20,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:37:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:37:21,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-11 22:37:21,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:37:21,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-07-11 22:37:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:37:21,400 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:37:21,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 36 [2022-07-11 22:37:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:37:21,794 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:37:21,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 39 [2022-07-11 22:37:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:37:21,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:37:21,895 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:37:21,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 51 [2022-07-11 22:37:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:37:38,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:37:42,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 184 treesize of output 162 [2022-07-11 22:37:42,432 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-11 22:37:42,432 INFO L390 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 257 treesize of output 237 [2022-07-11 22:37:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:37:42,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746412069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:37:42,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:37:42,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 19] total 59 [2022-07-11 22:37:42,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474870982] [2022-07-11 22:37:42,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:37:42,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-11 22:37:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:37:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-11 22:37:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3089, Unknown=2, NotChecked=0, Total=3422 [2022-07-11 22:37:42,606 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 59 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 8 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-11 22:38:15,112 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 78 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:38:31,176 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 95 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:38:40,886 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 113 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:38:52,829 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 92 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:39:05,244 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 85 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:39:16,630 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 86 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:39:43,187 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 78 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)