./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array7_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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-patterns/array7_pattern.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 85b55cdd1f26353e63ecc189ba28ba899672edc569fe3ef3f04470f2b5e667fa --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 11:39:04,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 11:39:04,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 11:39:04,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 11:39:04,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 11:39:04,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 11:39:04,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 11:39:04,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 11:39:04,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 11:39:04,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 11:39:04,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 11:39:04,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 11:39:04,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 11:39:04,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 11:39:04,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 11:39:04,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 11:39:04,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 11:39:04,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 11:39:04,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 11:39:04,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 11:39:04,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 11:39:04,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 11:39:04,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 11:39:04,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 11:39:04,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 11:39:04,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 11:39:04,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 11:39:04,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 11:39:04,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 11:39:04,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 11:39:04,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 11:39:04,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 11:39:04,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 11:39:04,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 11:39:04,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 11:39:04,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 11:39:04,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 11:39:04,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 11:39:04,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 11:39:04,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 11:39:04,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 11:39:04,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 11:39:04,232 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 11:39:04,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 11:39:04,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 11:39:04,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 11:39:04,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 11:39:04,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 11:39:04,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 11:39:04,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 11:39:04,235 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 11:39:04,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 11:39:04,235 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 11:39:04,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 11:39:04,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 11:39:04,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 11:39:04,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 11:39:04,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 11:39:04,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 11:39:04,236 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 11:39:04,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 11:39:04,237 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 11:39:04,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 11:39:04,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 11:39:04,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 11:39:04,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 11:39:04,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 11:39:04,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 11:39:04,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 11:39:04,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 11:39:04,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 11:39:04,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 11:39:04,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 11:39:04,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 11:39:04,239 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 11:39:04,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 11:39:04,239 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 11:39:04,239 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b55cdd1f26353e63ecc189ba28ba899672edc569fe3ef3f04470f2b5e667fa [2023-02-18 11:39:04,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 11:39:04,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 11:39:04,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 11:39:04,450 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 11:39:04,450 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 11:39:04,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array7_pattern.c [2023-02-18 11:39:05,357 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 11:39:05,523 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 11:39:05,523 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array7_pattern.c [2023-02-18 11:39:05,527 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1099330/90b8535e29ba442f8460d6ae27efe815/FLAG9ed866d1a [2023-02-18 11:39:05,536 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c1099330/90b8535e29ba442f8460d6ae27efe815 [2023-02-18 11:39:05,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 11:39:05,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 11:39:05,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 11:39:05,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 11:39:05,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 11:39:05,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c205bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05, skipping insertion in model container [2023-02-18 11:39:05,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 11:39:05,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 11:39:05,638 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array7_pattern.c[1375,1388] [2023-02-18 11:39:05,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 11:39:05,667 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 11:39:05,674 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array7_pattern.c[1375,1388] [2023-02-18 11:39:05,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 11:39:05,694 INFO L208 MainTranslator]: Completed translation [2023-02-18 11:39:05,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05 WrapperNode [2023-02-18 11:39:05,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 11:39:05,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 11:39:05,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 11:39:05,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 11:39:05,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,724 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-02-18 11:39:05,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 11:39:05,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 11:39:05,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 11:39:05,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 11:39:05,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 11:39:05,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 11:39:05,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 11:39:05,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 11:39:05,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (1/1) ... [2023-02-18 11:39:05,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 11:39:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:39:05,763 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) [2023-02-18 11:39:05,764 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 [2023-02-18 11:39:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 11:39:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 11:39:05,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 11:39:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 11:39:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 11:39:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 11:39:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 11:39:05,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 11:39:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 11:39:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 11:39:05,831 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 11:39:05,832 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 11:39:05,937 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 11:39:05,941 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 11:39:05,941 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 11:39:05,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:39:05 BoogieIcfgContainer [2023-02-18 11:39:05,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 11:39:05,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 11:39:05,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 11:39:05,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 11:39:05,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 11:39:05" (1/3) ... [2023-02-18 11:39:05,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e7ad63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:39:05, skipping insertion in model container [2023-02-18 11:39:05,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:39:05" (2/3) ... [2023-02-18 11:39:05,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e7ad63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:39:05, skipping insertion in model container [2023-02-18 11:39:05,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:39:05" (3/3) ... [2023-02-18 11:39:05,948 INFO L112 eAbstractionObserver]: Analyzing ICFG array7_pattern.c [2023-02-18 11:39:05,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 11:39:05,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 11:39:05,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 11:39:05,992 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55b15376, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 11:39:05,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 11:39:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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) [2023-02-18 11:39:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 11:39:05,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:39:06,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:39:06,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:39:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:39:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -440982883, now seen corresponding path program 1 times [2023-02-18 11:39:06,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:39:06,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766192939] [2023-02-18 11:39:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:06,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:39:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 11:39:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:39:06,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:39:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766192939] [2023-02-18 11:39:06,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766192939] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:39:06,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:39:06,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 11:39:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686209677] [2023-02-18 11:39:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:39:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 11:39:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:39:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 11:39:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 11:39:06,171 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 11:39:06,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:39:06,183 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2023-02-18 11:39:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 11:39:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-18 11:39:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:39:06,188 INFO L225 Difference]: With dead ends: 49 [2023-02-18 11:39:06,189 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 11:39:06,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 11:39:06,193 INFO L413 NwaCegarLoop]: 30 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, 30 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 [2023-02-18 11:39:06,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:39:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 11:39:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 11:39:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-02-18 11:39:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-18 11:39:06,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-02-18 11:39:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:39:06,215 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-18 11:39:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 11:39:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-18 11:39:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 11:39:06,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:39:06,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:39:06,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 11:39:06,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:39:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:39:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1396045698, now seen corresponding path program 1 times [2023-02-18 11:39:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:39:06,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233834049] [2023-02-18 11:39:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:06,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:39:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 11:39:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 11:39:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 11:39:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 11:39:06,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:39:06,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233834049] [2023-02-18 11:39:06,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233834049] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:39:06,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:39:06,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 11:39:06,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514516747] [2023-02-18 11:39:06,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:39:06,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 11:39:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:39:06,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 11:39:06,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 11:39:06,402 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 11:39:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:39:06,416 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-02-18 11:39:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 11:39:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-02-18 11:39:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:39:06,417 INFO L225 Difference]: With dead ends: 27 [2023-02-18 11:39:06,417 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 11:39:06,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 11:39:06,418 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 11:39:06,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:39:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 11:39:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-18 11:39:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-02-18 11:39:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-18 11:39:06,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 27 [2023-02-18 11:39:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:39:06,424 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-18 11:39:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 11:39:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-18 11:39:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 11:39:06,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:39:06,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:39:06,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 11:39:06,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:39:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:39:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1623352868, now seen corresponding path program 1 times [2023-02-18 11:39:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:39:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399264446] [2023-02-18 11:39:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:39:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 11:39:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 11:39:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 11:39:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 11:39:06,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:39:06,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399264446] [2023-02-18 11:39:06,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399264446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:39:06,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:39:06,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 11:39:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224150544] [2023-02-18 11:39:06,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:39:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 11:39:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:39:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 11:39:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 11:39:06,555 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 11:39:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:39:06,585 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-02-18 11:39:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 11:39:06,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-18 11:39:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:39:06,586 INFO L225 Difference]: With dead ends: 43 [2023-02-18 11:39:06,586 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 11:39:06,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 11:39:06,588 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 11:39:06,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:39:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 11:39:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-18 11:39:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-02-18 11:39:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-18 11:39:06,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2023-02-18 11:39:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:39:06,592 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-18 11:39:06,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 11:39:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-18 11:39:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 11:39:06,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:39:06,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:39:06,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 11:39:06,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:39:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:39:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1083978846, now seen corresponding path program 1 times [2023-02-18 11:39:06,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:39:06,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864818663] [2023-02-18 11:39:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:39:06,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 11:39:06,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941195042] [2023-02-18 11:39:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:06,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:39:06,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:39:06,610 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) [2023-02-18 11:39:06,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 11:39:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:39:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 11:39:06,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:39:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 11:39:06,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:39:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:39:06,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:39:06,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864818663] [2023-02-18 11:39:06,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 11:39:06,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941195042] [2023-02-18 11:39:06,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941195042] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 11:39:06,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 11:39:06,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2023-02-18 11:39:06,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061240778] [2023-02-18 11:39:06,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 11:39:06,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 11:39:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:39:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 11:39:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-02-18 11:39:06,811 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 11:39:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:39:06,945 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-02-18 11:39:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 11:39:06,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2023-02-18 11:39:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:39:06,947 INFO L225 Difference]: With dead ends: 73 [2023-02-18 11:39:06,947 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 11:39:06,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-02-18 11:39:06,948 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:39:06,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 110 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:39:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 11:39:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2023-02-18 11:39:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2023-02-18 11:39:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-18 11:39:06,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 31 [2023-02-18 11:39:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:39:06,952 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-18 11:39:06,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 11:39:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-18 11:39:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 11:39:06,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:39:06,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:39:06,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 11:39:07,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:39:07,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:39:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:39:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1214758882, now seen corresponding path program 2 times [2023-02-18 11:39:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:39:07,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232028449] [2023-02-18 11:39:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:39:07,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 11:39:07,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242626445] [2023-02-18 11:39:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 11:39:07,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:39:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:39:07,184 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) [2023-02-18 11:39:07,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 11:39:07,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 11:39:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 11:39:07,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 11:39:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:39:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:39:07,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:39:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 11:39:07,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:39:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232028449] [2023-02-18 11:39:07,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 11:39:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242626445] [2023-02-18 11:39:07,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242626445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 11:39:07,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 11:39:07,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-18 11:39:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591370398] [2023-02-18 11:39:07,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 11:39:07,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 11:39:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:39:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 11:39:07,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-18 11:39:07,337 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 11:39:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:39:07,396 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-02-18 11:39:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 11:39:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2023-02-18 11:39:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:39:07,426 INFO L225 Difference]: With dead ends: 40 [2023-02-18 11:39:07,426 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 11:39:07,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2023-02-18 11:39:07,427 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 11:39:07,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 68 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:39:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 11:39:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-18 11:39:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 11:39:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-02-18 11:39:07,433 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 35 [2023-02-18 11:39:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:39:07,433 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-02-18 11:39:07,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 11:39:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-02-18 11:39:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 11:39:07,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:39:07,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:39:07,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 11:39:07,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:39:07,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:39:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:39:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1618850078, now seen corresponding path program 3 times [2023-02-18 11:39:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:39:07,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173929273] [2023-02-18 11:39:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:39:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:39:07,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 11:39:07,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731706121] [2023-02-18 11:39:07,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 11:39:07,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:39:07,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:39:07,660 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) [2023-02-18 11:39:07,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 11:39:07,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 11:39:07,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 11:39:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 11:39:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:39:07,868 INFO L350 Elim1Store]: Elim1 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 [2023-02-18 11:39:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:39:07,889 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2023-02-18 11:39:07,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2023-02-18 11:39:07,900 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 33 treesize of output 32 [2023-02-18 11:39:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:39:07,929 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2023-02-18 11:39:07,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 34 treesize of output 38 [2023-02-18 11:39:07,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 70 [2023-02-18 11:39:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:39:07,975 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 78 [2023-02-18 11:39:07,978 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 47 treesize of output 45 [2023-02-18 11:39:07,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:39:07,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 68 [2023-02-18 11:39:07,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:39:07,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 47 treesize of output 142 [2023-02-18 11:39:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:39:11,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:39:11,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 44 select indices, 44 select index equivalence classes, 1 disjoint index pairs (out of 946 index pairs), introduced 44 new quantified variables, introduced 987 case distinctions, treesize of input 6209 treesize of output 14518 [2023-02-18 11:39:20,886 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:39:21,479 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,538 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,566 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,580 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,605 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,618 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,641 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,656 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,679 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,698 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,709 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,725 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,743 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,774 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,791 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,807 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,825 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,842 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,857 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,867 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,881 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,887 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,892 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,904 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,926 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,935 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:56,994 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,030 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,039 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,045 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,052 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,059 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,070 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,072 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,093 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,101 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,160 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,197 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,215 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,238 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,261 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,273 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,298 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,313 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,334 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,351 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,371 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,387 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,400 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,423 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,464 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,482 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 11:50:57,511 WARN L207 Elim1Store]: Array PQE input equivalent to false