./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/discover_list.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/loops-crafted-1/discover_list.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 b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:42:58,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:42:58,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:42:58,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:42:58,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:42:58,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:42:58,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:42:58,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:42:58,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:42:58,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:42:58,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:42:58,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:42:58,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:42:58,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:42:58,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:42:58,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:42:58,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:42:58,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:42:58,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:42:58,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:42:58,352 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:42:58,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:42:58,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:42:58,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:42:58,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:42:58,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:42:58,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:42:58,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:42:58,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:42:58,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:42:58,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:42:58,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:42:58,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:42:58,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:42:58,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:42:58,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:42:58,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:42:58,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:42:58,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:42:58,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:42:58,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:42:58,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:42:58,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:42:58,416 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:42:58,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:42:58,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:42:58,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:42:58,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:42:58,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:42:58,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:42:58,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:42:58,419 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:42:58,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:42:58,420 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:42:58,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:42:58,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:42:58,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:42:58,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:42:58,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:42:58,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:42:58,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:42:58,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:42:58,421 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:42:58,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:42:58,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:42:58,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:42:58,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:42:58,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:42:58,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:42:58,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:42:58,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:42:58,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:42:58,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:42:58,427 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:42:58,427 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:42:58,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:42:58,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b98ece0168fde0a9f5db629b0589397995dd8e9526df8a73dd8042a19f16d948 [2022-07-13 15:42:58,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:42:58,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:42:58,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:42:58,710 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:42:58,711 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:42:58,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/discover_list.c [2022-07-13 15:42:58,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362ef9e28/76f67a48ff504a639bf0e405b51876b3/FLAG3f834da9b [2022-07-13 15:42:59,334 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:42:59,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c [2022-07-13 15:42:59,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362ef9e28/76f67a48ff504a639bf0e405b51876b3/FLAG3f834da9b [2022-07-13 15:42:59,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362ef9e28/76f67a48ff504a639bf0e405b51876b3 [2022-07-13 15:42:59,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:42:59,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:42:59,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:42:59,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:42:59,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:42:59,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:42:59" (1/1) ... [2022-07-13 15:42:59,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0b2f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:42:59, skipping insertion in model container [2022-07-13 15:42:59,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:42:59" (1/1) ... [2022-07-13 15:42:59,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:42:59,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:42:59,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2022-07-13 15:43:00,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:43:00,030 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:43:00,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2022-07-13 15:43:00,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:43:00,136 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:43:00,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00 WrapperNode [2022-07-13 15:43:00,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:43:00,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:43:00,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:43:00,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:43:00,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,220 INFO L137 Inliner]: procedures = 36, calls = 627, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 496 [2022-07-13 15:43:00,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:43:00,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:43:00,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:43:00,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:43:00,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:43:00,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:43:00,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:43:00,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:43:00,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (1/1) ... [2022-07-13 15:43:00,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:43:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:00,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:43:00,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:43:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:43:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 15:43:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 15:43:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 15:43:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-07-13 15:43:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-13 15:43:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-13 15:43:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:43:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 15:43:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:43:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:43:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 15:43:00,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 15:43:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 15:43:00,497 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:43:00,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:43:00,860 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:43:00,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:43:00,867 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 15:43:00,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:43:00 BoogieIcfgContainer [2022-07-13 15:43:00,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:43:00,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:43:00,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:43:00,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:43:00,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:42:59" (1/3) ... [2022-07-13 15:43:00,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3466ef45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:43:00, skipping insertion in model container [2022-07-13 15:43:00,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:43:00" (2/3) ... [2022-07-13 15:43:00,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3466ef45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:43:00, skipping insertion in model container [2022-07-13 15:43:00,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:43:00" (3/3) ... [2022-07-13 15:43:00,901 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2022-07-13 15:43:00,918 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:43:00,919 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:43:00,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:43:00,985 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e9dd509, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3eaff63f [2022-07-13 15:43:00,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:43:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 64 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 15:43:00,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:00,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:01,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash 611198103, now seen corresponding path program 1 times [2022-07-13 15:43:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:01,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303289528] [2022-07-13 15:43:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:01,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:01,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 15:43:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:43:01,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303289528] [2022-07-13 15:43:01,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303289528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:43:01,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:43:01,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 15:43:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228186912] [2022-07-13 15:43:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:43:01,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 15:43:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:43:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 15:43:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:43:01,452 INFO L87 Difference]: Start difference. First operand has 75 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 64 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:43:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:43:01,781 INFO L93 Difference]: Finished difference Result 149 states and 231 transitions. [2022-07-13 15:43:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:43:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-07-13 15:43:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:43:01,795 INFO L225 Difference]: With dead ends: 149 [2022-07-13 15:43:01,796 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 15:43:01,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:43:01,802 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 9 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:43:01,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 365 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:43:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 15:43:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-07-13 15:43:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-07-13 15:43:01,852 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 38 [2022-07-13 15:43:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:43:01,853 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-07-13 15:43:01,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 15:43:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-07-13 15:43:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 15:43:01,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:01,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:43:01,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 885957717, now seen corresponding path program 1 times [2022-07-13 15:43:01,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161578440] [2022-07-13 15:43:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:01,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 15:43:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:43:02,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:02,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161578440] [2022-07-13 15:43:02,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161578440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:43:02,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123724121] [2022-07-13 15:43:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:02,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:02,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:43:02,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:43:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:43:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:43:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:43:02,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:43:02,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123724121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:43:02,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 15:43:02,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-13 15:43:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289892258] [2022-07-13 15:43:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:43:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:43:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:43:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:43:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:43:02,512 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:43:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:43:02,542 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-07-13 15:43:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:43:02,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-07-13 15:43:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:43:02,544 INFO L225 Difference]: With dead ends: 118 [2022-07-13 15:43:02,544 INFO L226 Difference]: Without dead ends: 65 [2022-07-13 15:43:02,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:43:02,546 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:43:02,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 242 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:43:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-13 15:43:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-13 15:43:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2022-07-13 15:43:02,556 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 38 [2022-07-13 15:43:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:43:02,557 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2022-07-13 15:43:02,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 15:43:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2022-07-13 15:43:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-13 15:43:02,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:02,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:02,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 15:43:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:02,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash 430601657, now seen corresponding path program 1 times [2022-07-13 15:43:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:02,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859154900] [2022-07-13 15:43:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:02,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 15:43:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:43:02,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859154900] [2022-07-13 15:43:02,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859154900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:43:02,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674210307] [2022-07-13 15:43:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:02,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:43:03,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:43:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 15:43:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:43:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:43:03,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:43:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 15:43:03,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674210307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:43:03,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:43:03,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-13 15:43:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525391023] [2022-07-13 15:43:03,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:43:03,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 15:43:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:43:03,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 15:43:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 15:43:03,532 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:43:03,782 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2022-07-13 15:43:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 15:43:03,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-07-13 15:43:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:43:03,784 INFO L225 Difference]: With dead ends: 128 [2022-07-13 15:43:03,784 INFO L226 Difference]: Without dead ends: 74 [2022-07-13 15:43:03,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:43:03,786 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 24 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:43:03,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 315 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:43:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-13 15:43:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-13 15:43:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2022-07-13 15:43:03,796 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 40 [2022-07-13 15:43:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:43:03,797 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2022-07-13 15:43:03,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2022-07-13 15:43:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 15:43:03,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:03,798 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:03,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:43:03,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 15:43:04,000 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1917005995, now seen corresponding path program 2 times [2022-07-13 15:43:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:04,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345056395] [2022-07-13 15:43:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:04,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:04,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 15:43:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 15:43:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:04,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345056395] [2022-07-13 15:43:04,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345056395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:43:04,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082279416] [2022-07-13 15:43:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:43:04,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:04,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:43:04,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:43:04,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:43:04,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:43:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 15:43:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:43:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 15:43:04,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:43:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 15:43:05,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082279416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:43:05,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:43:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-07-13 15:43:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679063420] [2022-07-13 15:43:05,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:43:05,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:43:05,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:43:05,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:43:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:43:05,142 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:43:05,512 INFO L93 Difference]: Finished difference Result 139 states and 185 transitions. [2022-07-13 15:43:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 15:43:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-07-13 15:43:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:43:05,514 INFO L225 Difference]: With dead ends: 139 [2022-07-13 15:43:05,514 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 15:43:05,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-07-13 15:43:05,515 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 21 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:43:05,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 450 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:43:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 15:43:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-13 15:43:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-07-13 15:43:05,530 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 44 [2022-07-13 15:43:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:43:05,533 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-07-13 15:43:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-07-13 15:43:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 15:43:05,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:05,540 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:05,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:43:05,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:05,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2100454571, now seen corresponding path program 3 times [2022-07-13 15:43:05,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:05,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169396091] [2022-07-13 15:43:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:05,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:05,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:06,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 15:43:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 15:43:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:06,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169396091] [2022-07-13 15:43:06,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169396091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:43:06,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040657763] [2022-07-13 15:43:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:43:06,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:06,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:43:06,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:43:07,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 15:43:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:43:07,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 15:43:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:43:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 15:43:07,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:43:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 15:43:07,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040657763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:43:07,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:43:07,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-07-13 15:43:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835830876] [2022-07-13 15:43:07,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:43:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 15:43:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:43:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 15:43:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-13 15:43:07,447 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:43:08,351 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2022-07-13 15:43:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 15:43:08,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-07-13 15:43:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:43:08,353 INFO L225 Difference]: With dead ends: 152 [2022-07-13 15:43:08,353 INFO L226 Difference]: Without dead ends: 87 [2022-07-13 15:43:08,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 15:43:08,354 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 43 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:43:08,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 756 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 15:43:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-13 15:43:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-13 15:43:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-07-13 15:43:08,374 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 48 [2022-07-13 15:43:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:43:08,375 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-07-13 15:43:08,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-07-13 15:43:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 15:43:08,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:08,376 INFO L195 NwaCegarLoop]: trace histogram [19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:08,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:43:08,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:08,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1661068933, now seen corresponding path program 4 times [2022-07-13 15:43:08,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:08,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56684099] [2022-07-13 15:43:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:08,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:08,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 15:43:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 15:43:08,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56684099] [2022-07-13 15:43:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56684099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:43:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666450575] [2022-07-13 15:43:08,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:43:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:08,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:43:08,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:43:09,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:43:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:43:09,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 15:43:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:43:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-13 15:43:09,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:43:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 15:43:09,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666450575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:43:09,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:43:09,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-13 15:43:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134658286] [2022-07-13 15:43:09,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:43:09,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 15:43:09,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:43:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 15:43:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-07-13 15:43:09,831 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:43:15,791 INFO L93 Difference]: Finished difference Result 163 states and 211 transitions. [2022-07-13 15:43:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 15:43:15,792 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-07-13 15:43:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:43:15,793 INFO L225 Difference]: With dead ends: 163 [2022-07-13 15:43:15,793 INFO L226 Difference]: Without dead ends: 96 [2022-07-13 15:43:15,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=679, Invalid=1577, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 15:43:15,795 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 62 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:43:15,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1108 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:43:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-13 15:43:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-13 15:43:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 84 states have internal predecessors, (102), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 15:43:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-07-13 15:43:15,806 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 57 [2022-07-13 15:43:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:43:15,807 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-07-13 15:43:15,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 15:43:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-07-13 15:43:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 15:43:15,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:43:15,808 INFO L195 NwaCegarLoop]: trace histogram [28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:43:15,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:43:16,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:16,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:43:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:43:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1004739755, now seen corresponding path program 5 times [2022-07-13 15:43:16,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:43:16,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394366082] [2022-07-13 15:43:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:43:16,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:43:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 15:43:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:16,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 15:43:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:43:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 15:43:16,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:43:16,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394366082] [2022-07-13 15:43:16,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394366082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:43:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644229310] [2022-07-13 15:43:16,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:43:16,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:43:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:43:16,600 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:43:16,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process