./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.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/nla-digbench-scaling/prod4br-ll_unwindbound2.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 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:46:56,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:46:56,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:46:56,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:46:56,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:46:56,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:46:56,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:46:56,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:46:56,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:46:56,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:46:56,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:46:56,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:46:56,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:46:56,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:46:56,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:46:56,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:46:56,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:46:56,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:46:56,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:46:56,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:46:56,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:46:56,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:46:56,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:46:56,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:46:56,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:46:56,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:46:56,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:46:56,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:46:56,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:46:56,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:46:56,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:46:56,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:46:56,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:46:56,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:46:56,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:46:56,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:46:56,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:46:56,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:46:56,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:46:56,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:46:56,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:46:56,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:46:56,357 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:46:56,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:46:56,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:46:56,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:46:56,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:46:56,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:46:56,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:46:56,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:46:56,359 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:46:56,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:46:56,360 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:46:56,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:46:56,361 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:46:56,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:46:56,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:46:56,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:46:56,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:46:56,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:46:56,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:46:56,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:46:56,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:46:56,364 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:46:56,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee [2023-02-17 07:46:56,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:46:56,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:46:56,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:46:56,588 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:46:56,588 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:46:56,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2023-02-17 07:46:57,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:46:57,851 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:46:57,851 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2023-02-17 07:46:57,858 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c476ca1fd/5fe3d26da2fc4855a715a545d7731177/FLAGb95e09f94 [2023-02-17 07:46:57,871 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c476ca1fd/5fe3d26da2fc4855a715a545d7731177 [2023-02-17 07:46:57,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:46:57,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:46:57,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:46:57,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:46:57,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:46:57,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:46:57" (1/1) ... [2023-02-17 07:46:57,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abe246c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:57, skipping insertion in model container [2023-02-17 07:46:57,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:46:57" (1/1) ... [2023-02-17 07:46:57,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:46:57,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:46:58,025 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/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2023-02-17 07:46:58,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:46:58,061 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:46:58,069 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/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2023-02-17 07:46:58,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:46:58,084 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:46:58,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58 WrapperNode [2023-02-17 07:46:58,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:46:58,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:46:58,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:46:58,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:46:58,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,125 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-17 07:46:58,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:46:58,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:46:58,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:46:58,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:46:58,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:46:58,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:46:58,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:46:58,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:46:58,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (1/1) ... [2023-02-17 07:46:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:46:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:46:58,184 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) [2023-02-17 07:46:58,189 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 [2023-02-17 07:46:58,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:46:58,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:46:58,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:46:58,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:46:58,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:46:58,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:46:58,253 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:46:58,256 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:46:58,363 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:46:58,366 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:46:58,367 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 07:46:58,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:46:58 BoogieIcfgContainer [2023-02-17 07:46:58,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:46:58,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:46:58,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:46:58,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:46:58,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:46:57" (1/3) ... [2023-02-17 07:46:58,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508e1235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:46:58, skipping insertion in model container [2023-02-17 07:46:58,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:46:58" (2/3) ... [2023-02-17 07:46:58,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508e1235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:46:58, skipping insertion in model container [2023-02-17 07:46:58,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:46:58" (3/3) ... [2023-02-17 07:46:58,374 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2023-02-17 07:46:58,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:46:58,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:46:58,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:46:58,430 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;@5d1c80a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:46:58,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:46:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) [2023-02-17 07:46:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 07:46:58,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:46:58,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:46:58,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:46:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:46:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2023-02-17 07:46:58,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:46:58,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767055429] [2023-02-17 07:46:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:58,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:46:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:46:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:46:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767055429] [2023-02-17 07:46:58,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:46:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626089821] [2023-02-17 07:46:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:46:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:46:58,559 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) [2023-02-17 07:46:58,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:46:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:46:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 07:46:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:46:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:46:58,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:46:58,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626089821] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:46:58,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:46:58,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:46:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654211501] [2023-02-17 07:46:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:46:58,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:46:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:46:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:46:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:46:58,713 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:46:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:46:58,735 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-17 07:46:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:46:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 07:46:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:46:58,760 INFO L225 Difference]: With dead ends: 43 [2023-02-17 07:46:58,761 INFO L226 Difference]: Without dead ends: 19 [2023-02-17 07:46:58,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:46:58,765 INFO L413 NwaCegarLoop]: 29 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, 29 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 [2023-02-17 07:46:58,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:46:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-17 07:46:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-17 07:46:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:46:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-17 07:46:58,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2023-02-17 07:46:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:46:58,790 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-17 07:46:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:46:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-17 07:46:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 07:46:58,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:46:58,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:46:58,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 07:46:58,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 07:46:58,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:46:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:46:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2023-02-17 07:46:58,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:46:58,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991732763] [2023-02-17 07:46:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:59,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:46:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:46:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:46:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991732763] [2023-02-17 07:46:59,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:46:59,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39601582] [2023-02-17 07:46:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:59,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:46:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:46:59,052 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) [2023-02-17 07:46:59,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:46:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:46:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 07:46:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:46:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:46:59,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:46:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39601582] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:46:59,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:46:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 07:46:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094703131] [2023-02-17 07:46:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:46:59,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:46:59,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:46:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:46:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:46:59,164 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:46:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:46:59,197 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-02-17 07:46:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:46:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 07:46:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:46:59,200 INFO L225 Difference]: With dead ends: 29 [2023-02-17 07:46:59,200 INFO L226 Difference]: Without dead ends: 21 [2023-02-17 07:46:59,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:46:59,201 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 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 [2023-02-17 07:46:59,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:46:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-17 07:46:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-17 07:46:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:46:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-02-17 07:46:59,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2023-02-17 07:46:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:46:59,212 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-02-17 07:46:59,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:46:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-02-17 07:46:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 07:46:59,213 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:46:59,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:46:59,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 07:46:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 07:46:59,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:46:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:46:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2023-02-17 07:46:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:46:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595916515] [2023-02-17 07:46:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:46:59,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:46:59,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264121104] [2023-02-17 07:46:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:46:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:46:59,474 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) [2023-02-17 07:46:59,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:46:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:46:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:46:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:46:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:46:59,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:46:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:46:59,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595916515] [2023-02-17 07:46:59,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:46:59,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264121104] [2023-02-17 07:46:59,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264121104] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:46:59,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:46:59,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 07:46:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794463951] [2023-02-17 07:46:59,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:46:59,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 07:46:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:46:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 07:46:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 07:46:59,590 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:46:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:46:59,673 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-02-17 07:46:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 07:46:59,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 07:46:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:46:59,676 INFO L225 Difference]: With dead ends: 34 [2023-02-17 07:46:59,676 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 07:46:59,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:46:59,679 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:46:59,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:46:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 07:46:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-17 07:46:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:46:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-17 07:46:59,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2023-02-17 07:46:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:46:59,693 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-17 07:46:59,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:46:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-17 07:46:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 07:46:59,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:46:59,697 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:46:59,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:46:59,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:46:59,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:46:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:46:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2023-02-17 07:46:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:46:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216883257] [2023-02-17 07:46:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:46:59,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:46:59,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383993931] [2023-02-17 07:46:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:46:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:46:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:46:59,935 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) [2023-02-17 07:46:59,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:46:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:46:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 07:46:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:00,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:00,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216883257] [2023-02-17 07:47:00,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:00,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383993931] [2023-02-17 07:47:00,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383993931] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:00,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:00,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 07:47:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423852122] [2023-02-17 07:47:00,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:47:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:47:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:47:00,194 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:00,412 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-02-17 07:47:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:47:00,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-17 07:47:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:00,416 INFO L225 Difference]: With dead ends: 47 [2023-02-17 07:47:00,417 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 07:47:00,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:47:00,420 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:00,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 71 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:47:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 07:47:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2023-02-17 07:47:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:47:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-17 07:47:00,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2023-02-17 07:47:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:00,438 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-17 07:47:00,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-17 07:47:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 07:47:00,443 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:00,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:00,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:00,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2023-02-17 07:47:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:00,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994758701] [2023-02-17 07:47:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:00,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:00,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213437971] [2023-02-17 07:47:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:00,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:00,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:47:00,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:47:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 07:47:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:00,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:00,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994758701] [2023-02-17 07:47:00,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213437971] [2023-02-17 07:47:00,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213437971] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:00,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:00,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-02-17 07:47:00,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984583618] [2023-02-17 07:47:00,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:00,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:47:00,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:47:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:47:00,709 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 07:47:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:00,728 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2023-02-17 07:47:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:47:00,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-17 07:47:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:00,729 INFO L225 Difference]: With dead ends: 57 [2023-02-17 07:47:00,729 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 07:47:00,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:47:00,730 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:00,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:47:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 07:47:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-02-17 07:47:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 07:47:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-02-17 07:47:00,737 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 19 [2023-02-17 07:47:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:00,737 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-02-17 07:47:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 07:47:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-02-17 07:47:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 07:47:00,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:00,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:00,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:00,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:00,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2023-02-17 07:47:00,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185408321] [2023-02-17 07:47:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:00,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:00,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:00,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664123769] [2023-02-17 07:47:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:00,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:47:00,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:47:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 07:47:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:01,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:01,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:01,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185408321] [2023-02-17 07:47:01,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:01,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664123769] [2023-02-17 07:47:01,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664123769] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:01,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:01,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 07:47:01,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267476645] [2023-02-17 07:47:01,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:01,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:47:01,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:01,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:47:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:47:01,239 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:01,625 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2023-02-17 07:47:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 07:47:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-17 07:47:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:01,627 INFO L225 Difference]: With dead ends: 60 [2023-02-17 07:47:01,627 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 07:47:01,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:47:01,628 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:01,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 54 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 07:47:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 07:47:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-02-17 07:47:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 07:47:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-02-17 07:47:01,637 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 19 [2023-02-17 07:47:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:01,637 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-02-17 07:47:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-02-17 07:47:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 07:47:01,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:01,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:01,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 07:47:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:01,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2023-02-17 07:47:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:01,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653601057] [2023-02-17 07:47:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:01,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599017464] [2023-02-17 07:47:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:01,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:01,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:47:01,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:47:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 07:47:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:47:01,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 07:47:01,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653601057] [2023-02-17 07:47:01,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599017464] [2023-02-17 07:47:01,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599017464] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 07:47:01,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:47:01,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 07:47:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112316720] [2023-02-17 07:47:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:47:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:47:01,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:47:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:47:01,978 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:02,115 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-02-17 07:47:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:47:02,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-17 07:47:02,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:02,116 INFO L225 Difference]: With dead ends: 56 [2023-02-17 07:47:02,116 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 07:47:02,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:47:02,116 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:02,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:47:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 07:47:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-17 07:47:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:47:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-02-17 07:47:02,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2023-02-17 07:47:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:02,122 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-02-17 07:47:02,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-02-17 07:47:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 07:47:02,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:02,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:02,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 07:47:02,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:02,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash 55344605, now seen corresponding path program 2 times [2023-02-17 07:47:02,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:02,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176060092] [2023-02-17 07:47:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:02,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:02,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779781370] [2023-02-17 07:47:02,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:47:02,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:02,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:47:02,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:47:02,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:47:02,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-17 07:47:02,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 07:47:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 07:47:02,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 07:47:02,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 07:47:02,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 07:47:02,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:02,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 07:47:02,647 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:02,649 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 07:47:02,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 07:47:02 BoogieIcfgContainer [2023-02-17 07:47:02,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 07:47:02,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 07:47:02,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 07:47:02,681 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 07:47:02,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:46:58" (3/4) ... [2023-02-17 07:47:02,682 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 07:47:02,707 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 07:47:02,707 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 07:47:02,708 INFO L158 Benchmark]: Toolchain (without parser) took 4833.41ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 80.0MB in the beginning and 51.2MB in the end (delta: 28.7MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. [2023-02-17 07:47:02,708 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 115.3MB. Free memory was 91.0MB in the beginning and 90.9MB in the end (delta: 68.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:47:02,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.81ms. Allocated memory is still 115.3MB. Free memory was 79.7MB in the beginning and 68.9MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-17 07:47:02,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.75ms. Allocated memory is still 115.3MB. Free memory was 68.9MB in the beginning and 67.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:47:02,709 INFO L158 Benchmark]: Boogie Preprocessor took 33.98ms. Allocated memory is still 115.3MB. Free memory was 67.3MB in the beginning and 66.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 07:47:02,709 INFO L158 Benchmark]: RCFGBuilder took 207.97ms. Allocated memory is still 115.3MB. Free memory was 66.1MB in the beginning and 55.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 07:47:02,709 INFO L158 Benchmark]: TraceAbstraction took 4310.43ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 54.5MB in the beginning and 54.4MB in the end (delta: 136.6kB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2023-02-17 07:47:02,709 INFO L158 Benchmark]: Witness Printer took 27.18ms. Allocated memory is still 142.6MB. Free memory was 54.4MB in the beginning and 51.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 07:47:02,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 115.3MB. Free memory was 91.0MB in the beginning and 90.9MB in the end (delta: 68.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.81ms. Allocated memory is still 115.3MB. Free memory was 79.7MB in the beginning and 68.9MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.75ms. Allocated memory is still 115.3MB. Free memory was 68.9MB in the beginning and 67.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.98ms. Allocated memory is still 115.3MB. Free memory was 67.3MB in the beginning and 66.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 207.97ms. Allocated memory is still 115.3MB. Free memory was 66.1MB in the beginning and 55.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4310.43ms. Allocated memory was 115.3MB in the beginning and 142.6MB in the end (delta: 27.3MB). Free memory was 54.5MB in the beginning and 54.4MB in the end (delta: 136.6kB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * Witness Printer took 27.18ms. Allocated memory is still 142.6MB. Free memory was 54.4MB in the beginning and 51.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=4, b=4, counter=0, p=1, q=0, x=4, y=4] [L33] EXPR counter++ VAL [a=4, b=4, counter=1, counter++=0, p=1, q=0, x=4, y=4] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=2, counter=1, p=4, q=0, x=4, y=4] [L33] EXPR counter++ VAL [a=2, b=2, counter=2, counter++=1, p=4, q=0, x=4, y=4] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=2, counter=2, p=4, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=2, b=2, counter=2, p=4, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1, b=1, counter=2, p=16, q=0, x=4, y=4] [L33] EXPR counter++ VAL [a=1, b=1, counter=3, counter++=2, p=16, q=0, x=4, y=4] [L33] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 239 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 239 mSDsluCounter, 441 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 293 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 475 IncrementalHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 148 mSDtfsCounter, 475 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=6, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 151 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 168 ConstructedInterpolants, 2 QuantifiedInterpolants, 1432 SizeOfPredicates, 34 NumberOfNonLiveVariables, 483 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 26/38 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-17 07:47:02,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE