./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_fib-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/seq-pthread/cs_fib-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f188ac4b0bdfe335e0fcb7c5645493965a99a7b8a1d7a552e9d512c30775fb8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 06:19:36,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 06:19:36,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 06:19:36,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 06:19:36,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 06:19:36,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 06:19:36,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 06:19:36,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 06:19:36,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 06:19:36,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 06:19:36,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 06:19:36,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 06:19:36,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 06:19:36,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 06:19:36,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 06:19:36,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 06:19:36,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 06:19:36,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 06:19:36,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 06:19:36,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 06:19:36,442 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 06:19:36,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 06:19:36,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 06:19:36,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 06:19:36,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 06:19:36,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 06:19:36,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 06:19:36,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 06:19:36,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 06:19:36,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 06:19:36,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 06:19:36,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 06:19:36,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 06:19:36,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 06:19:36,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 06:19:36,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 06:19:36,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 06:19:36,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 06:19:36,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 06:19:36,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 06:19:36,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 06:19:36,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 06:19:36,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 06:19:36,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 06:19:36,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 06:19:36,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 06:19:36,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 06:19:36,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 06:19:36,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 06:19:36,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 06:19:36,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 06:19:36,487 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 06:19:36,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 06:19:36,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 06:19:36,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 06:19:36,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 06:19:36,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 06:19:36,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 06:19:36,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 06:19:36,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 06:19:36,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 06:19:36,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 06:19:36,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 06:19:36,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 06:19:36,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 06:19:36,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 06:19:36,491 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 06:19:36,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 06:19:36,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 06:19:36,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f188ac4b0bdfe335e0fcb7c5645493965a99a7b8a1d7a552e9d512c30775fb8 [2022-07-21 06:19:36,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 06:19:36,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 06:19:36,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 06:19:36,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 06:19:36,787 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 06:19:36,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_fib-2.i [2022-07-21 06:19:36,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61dac91b4/34f22756162a4785a6ba08c0be4c4ecc/FLAG4f21db657 [2022-07-21 06:19:37,298 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 06:19:37,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_fib-2.i [2022-07-21 06:19:37,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61dac91b4/34f22756162a4785a6ba08c0be4c4ecc/FLAG4f21db657 [2022-07-21 06:19:37,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61dac91b4/34f22756162a4785a6ba08c0be4c4ecc [2022-07-21 06:19:37,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 06:19:37,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 06:19:37,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 06:19:37,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 06:19:37,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 06:19:37,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30311c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37, skipping insertion in model container [2022-07-21 06:19:37,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 06:19:37,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 06:19:37,619 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/seq-pthread/cs_fib-2.i[23457,23470] [2022-07-21 06:19:37,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 06:19:37,740 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 06:19:37,766 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/seq-pthread/cs_fib-2.i[23457,23470] [2022-07-21 06:19:37,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 06:19:37,884 INFO L208 MainTranslator]: Completed translation [2022-07-21 06:19:37,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37 WrapperNode [2022-07-21 06:19:37,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 06:19:37,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 06:19:37,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 06:19:37,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 06:19:37,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,960 INFO L137 Inliner]: procedures = 144, calls = 356, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 674 [2022-07-21 06:19:37,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 06:19:37,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 06:19:37,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 06:19:37,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 06:19:37,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:37,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:38,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:38,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:38,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:38,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 06:19:38,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 06:19:38,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 06:19:38,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 06:19:38,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (1/1) ... [2022-07-21 06:19:38,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 06:19:38,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 06:19:38,089 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) [2022-07-21 06:19:38,093 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 [2022-07-21 06:19:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 06:19:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 06:19:38,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 06:19:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 06:19:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 06:19:38,122 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 06:19:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 06:19:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 06:19:38,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 06:19:38,123 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-07-21 06:19:38,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-07-21 06:19:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 06:19:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-07-21 06:19:38,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-07-21 06:19:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 06:19:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-07-21 06:19:38,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-07-21 06:19:38,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 06:19:38,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 06:19:38,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 06:19:38,340 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 06:19:38,341 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !(0 != ~__CS_ret~0 % 256); [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !(0 != ~__CS_ret~0 % 256); [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L749: SUMMARY for call __CS_cs(); srcloc: null [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L749-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-07-21 06:19:38,560 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L749-1: assume !(0 != ~__CS_ret~0 % 256); [2022-07-21 06:19:41,451 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 06:19:41,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 06:19:41,458 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 06:19:41,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 06:19:41 BoogieIcfgContainer [2022-07-21 06:19:41,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 06:19:41,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 06:19:41,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 06:19:41,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 06:19:41,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 06:19:37" (1/3) ... [2022-07-21 06:19:41,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6ec51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 06:19:41, skipping insertion in model container [2022-07-21 06:19:41,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:37" (2/3) ... [2022-07-21 06:19:41,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6ec51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 06:19:41, skipping insertion in model container [2022-07-21 06:19:41,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 06:19:41" (3/3) ... [2022-07-21 06:19:41,469 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_fib-2.i [2022-07-21 06:19:41,479 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 06:19:41,479 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 06:19:41,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 06:19:41,544 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@1c12d640, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3871ad47 [2022-07-21 06:19:41,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 06:19:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 111 states have internal predecessors, (148), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-07-21 06:19:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-21 06:19:41,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:19:41,580 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-07-21 06:19:41,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:19:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:19:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1273778085, now seen corresponding path program 1 times [2022-07-21 06:19:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:19:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639678506] [2022-07-21 06:19:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:19:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:20:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 06:21:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 06:21:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 06:21:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 06:21:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-21 06:21:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 06:21:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 06:21:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 06:21:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 06:21:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 06:21:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-21 06:21:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 06:21:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 06:21:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 06:21:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-21 06:21:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 06:21:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-21 06:21:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-21 06:21:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-21 06:21:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-07-21 06:21:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-07-21 06:21:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-07-21 06:21:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-21 06:21:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-21 06:21:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-07-21 06:21:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-07-21 06:21:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-07-21 06:21:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-07-21 06:21:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-07-21 06:21:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-07-21 06:21:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-07-21 06:21:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-07-21 06:21:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-07-21 06:21:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-07-21 06:21:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-07-21 06:21:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-07-21 06:21:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-07-21 06:21:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2022-07-21 06:21:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-07-21 06:21:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-07-21 06:21:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:21:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2022-07-21 06:21:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:21:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639678506] [2022-07-21 06:21:00,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639678506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:21:00,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:21:00,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 06:21:00,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984546192] [2022-07-21 06:21:00,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:21:00,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 06:21:00,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:21:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 06:21:00,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 06:21:00,444 INFO L87 Difference]: Start difference. First operand has 183 states, 110 states have (on average 1.3454545454545455) internal successors, (148), 111 states have internal predecessors, (148), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2022-07-21 06:21:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:21:00,477 INFO L93 Difference]: Finished difference Result 364 states and 622 transitions. [2022-07-21 06:21:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 06:21:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 254 [2022-07-21 06:21:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:21:00,486 INFO L225 Difference]: With dead ends: 364 [2022-07-21 06:21:00,486 INFO L226 Difference]: Without dead ends: 179 [2022-07-21 06:21:00,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 06:21:00,497 INFO L413 NwaCegarLoop]: 274 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, 274 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 [2022-07-21 06:21:00,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:21:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-21 06:21:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-07-21 06:21:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 108 states have internal predecessors, (139), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-07-21 06:21:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 270 transitions. [2022-07-21 06:21:00,563 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 270 transitions. Word has length 254 [2022-07-21 06:21:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:21:00,564 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 270 transitions. [2022-07-21 06:21:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2022-07-21 06:21:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 270 transitions. [2022-07-21 06:21:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-21 06:21:00,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:21:00,568 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-07-21 06:21:00,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 06:21:00,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:21:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:21:00,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1062872223, now seen corresponding path program 1 times [2022-07-21 06:21:00,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:21:00,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822432801] [2022-07-21 06:21:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:21:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms