/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 10:38:36,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 10:38:36,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 10:38:36,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 10:38:36,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 10:38:36,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 10:38:36,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 10:38:36,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 10:38:36,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 10:38:36,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 10:38:36,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 10:38:36,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 10:38:36,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 10:38:36,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 10:38:36,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 10:38:36,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 10:38:36,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 10:38:36,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 10:38:36,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 10:38:36,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 10:38:36,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 10:38:36,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 10:38:36,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 10:38:36,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 10:38:36,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 10:38:36,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 10:38:36,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 10:38:36,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 10:38:36,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 10:38:36,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 10:38:36,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 10:38:36,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 10:38:36,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 10:38:36,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 10:38:36,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 10:38:36,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 10:38:36,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 10:38:36,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 10:38:36,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 10:38:36,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 10:38:36,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 10:38:36,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-09-16 10:38:36,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 10:38:36,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 10:38:36,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-16 10:38:36,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-16 10:38:36,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 10:38:36,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 10:38:36,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 10:38:36,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 10:38:36,357 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 10:38:36,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 10:38:36,357 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 10:38:36,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 10:38:36,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 10:38:36,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 10:38:36,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 10:38:36,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 10:38:36,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 10:38:36,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 10:38:36,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 10:38:36,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 10:38:36,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 10:38:36,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 10:38:36,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 10:38:36,360 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 10:38:36,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-09-16 10:38:36,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 10:38:36,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 10:38:36,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 10:38:36,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 10:38:36,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 10:38:36,562 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 10:38:36,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i [2022-09-16 10:38:36,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50341409e/d3a8652ee1e44aeebe1bf60023381aff/FLAGb846f5838 [2022-09-16 10:38:37,034 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 10:38:37,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i [2022-09-16 10:38:37,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50341409e/d3a8652ee1e44aeebe1bf60023381aff/FLAGb846f5838 [2022-09-16 10:38:37,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50341409e/d3a8652ee1e44aeebe1bf60023381aff [2022-09-16 10:38:37,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 10:38:37,076 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 10:38:37,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 10:38:37,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 10:38:37,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 10:38:37,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbf8232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37, skipping insertion in model container [2022-09-16 10:38:37,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 10:38:37,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 10:38:37,239 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-09-16 10:38:37,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-09-16 10:38:37,423 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39180,39193] [2022-09-16 10:38:37,423 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39232,39245] [2022-09-16 10:38:37,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49285,49298] [2022-09-16 10:38:37,475 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49334,49347] [2022-09-16 10:38:37,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49462,49475] [2022-09-16 10:38:37,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49520,49533] [2022-09-16 10:38:37,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 10:38:37,489 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 10:38:37,497 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-09-16 10:38:37,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39095,39108] [2022-09-16 10:38:37,515 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39180,39193] [2022-09-16 10:38:37,515 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[39232,39245] [2022-09-16 10:38:37,522 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49285,49298] [2022-09-16 10:38:37,522 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49334,49347] [2022-09-16 10:38:37,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49462,49475] [2022-09-16 10:38:37,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_2w1r-2.i[49520,49533] [2022-09-16 10:38:37,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 10:38:37,561 INFO L208 MainTranslator]: Completed translation [2022-09-16 10:38:37,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37 WrapperNode [2022-09-16 10:38:37,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 10:38:37,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 10:38:37,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 10:38:37,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 10:38:37,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,616 INFO L138 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 216 [2022-09-16 10:38:37,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 10:38:37,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 10:38:37,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 10:38:37,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 10:38:37,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 10:38:37,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 10:38:37,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 10:38:37,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 10:38:37,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (1/1) ... [2022-09-16 10:38:37,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 10:38:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 10:38:37,686 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) [2022-09-16 10:38:37,693 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 [2022-09-16 10:38:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-09-16 10:38:37,715 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-09-16 10:38:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-09-16 10:38:37,715 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-09-16 10:38:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 10:38:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 10:38:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 10:38:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 10:38:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 10:38:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 10:38:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 10:38:37,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 10:38:37,717 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-16 10:38:37,800 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 10:38:37,801 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 10:38:38,089 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 10:38:38,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 10:38:38,096 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-09-16 10:38:38,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 10:38:38 BoogieIcfgContainer [2022-09-16 10:38:38,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 10:38:38,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 10:38:38,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 10:38:38,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 10:38:38,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 10:38:37" (1/3) ... [2022-09-16 10:38:38,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64071706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 10:38:38, skipping insertion in model container [2022-09-16 10:38:38,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 10:38:37" (2/3) ... [2022-09-16 10:38:38,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64071706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 10:38:38, skipping insertion in model container [2022-09-16 10:38:38,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 10:38:38" (3/3) ... [2022-09-16 10:38:38,104 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-09-16 10:38:38,109 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-09-16 10:38:38,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 10:38:38,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-09-16 10:38:38,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 10:38:38,203 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-16 10:38:38,233 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 258 places, 268 transitions, 552 flow [2022-09-16 10:38:42,721 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 245673 states, 244783 states have (on average 3.209847089054387) internal successors, (785716), 245672 states have internal predecessors, (785716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:38:42,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 10:38:42,739 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@611874a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 10:38:42,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-09-16 10:38:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 245673 states, 244783 states have (on average 3.209847089054387) internal successors, (785716), 245672 states have internal predecessors, (785716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:38:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-09-16 10:38:43,189 INFO L187 NwaCegarLoop]: Found error trace [2022-09-16 10:38:43,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 10:38:43,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting writer_fnErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-09-16 10:38:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 10:38:43,194 INFO L85 PathProgramCache]: Analyzing trace with hash 843996879, now seen corresponding path program 1 times [2022-09-16 10:38:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 10:38:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050778314] [2022-09-16 10:38:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 10:38:43,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 10:38:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 10:38:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 10:38:43,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 10:38:43,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050778314] [2022-09-16 10:38:43,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050778314] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 10:38:43,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 10:38:43,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 10:38:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088201164] [2022-09-16 10:38:43,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 10:38:43,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 10:38:43,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 10:38:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 10:38:43,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 10:38:43,780 INFO L87 Difference]: Start difference. First operand has 245673 states, 244783 states have (on average 3.209847089054387) internal successors, (785716), 245672 states have internal predecessors, (785716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:38:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-09-16 10:38:48,069 INFO L93 Difference]: Finished difference Result 430905 states and 1319246 transitions. [2022-09-16 10:38:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 10:38:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-09-16 10:38:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-09-16 10:38:50,428 INFO L225 Difference]: With dead ends: 430905 [2022-09-16 10:38:50,429 INFO L226 Difference]: Without dead ends: 430821 [2022-09-16 10:38:50,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 10:38:50,432 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 193 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-09-16 10:38:50,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 621 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-09-16 10:38:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430821 states. [2022-09-16 10:39:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430821 to 398133. [2022-09-16 10:39:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398133 states, 396923 states have (on average 3.127775412359576) internal successors, (1241486), 398132 states have internal predecessors, (1241486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:39:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398133 states to 398133 states and 1241486 transitions. [2022-09-16 10:39:04,739 INFO L78 Accepts]: Start accepts. Automaton has 398133 states and 1241486 transitions. Word has length 44 [2022-09-16 10:39:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-09-16 10:39:04,742 INFO L495 AbstractCegarLoop]: Abstraction has 398133 states and 1241486 transitions. [2022-09-16 10:39:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:39:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 398133 states and 1241486 transitions. [2022-09-16 10:39:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-09-16 10:39:04,758 INFO L187 NwaCegarLoop]: Found error trace [2022-09-16 10:39:04,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 10:39:04,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 10:39:04,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-09-16 10:39:04,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 10:39:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1075510318, now seen corresponding path program 1 times [2022-09-16 10:39:04,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 10:39:04,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937807686] [2022-09-16 10:39:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 10:39:04,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 10:39:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 10:39:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 10:39:04,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 10:39:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937807686] [2022-09-16 10:39:04,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937807686] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 10:39:04,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 10:39:04,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 10:39:04,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370426105] [2022-09-16 10:39:04,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 10:39:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 10:39:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 10:39:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 10:39:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 10:39:04,833 INFO L87 Difference]: Start difference. First operand 398133 states and 1241486 transitions. Second operand has 3 states, 2 states have (on average 25.0) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:39:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-09-16 10:39:10,503 INFO L93 Difference]: Finished difference Result 643851 states and 2011027 transitions. [2022-09-16 10:39:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 10:39:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 25.0) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-09-16 10:39:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-09-16 10:39:14,303 INFO L225 Difference]: With dead ends: 643851 [2022-09-16 10:39:14,303 INFO L226 Difference]: Without dead ends: 643851 [2022-09-16 10:39:14,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 10:39:14,304 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 180 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-09-16 10:39:14,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 608 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-09-16 10:39:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643851 states. [2022-09-16 10:39:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643851 to 600489. [2022-09-16 10:39:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600489 states, 599279 states have (on average 3.179502368679697) internal successors, (1905409), 600488 states have internal predecessors, (1905409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:39:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600489 states to 600489 states and 1905409 transitions. [2022-09-16 10:39:41,918 INFO L78 Accepts]: Start accepts. Automaton has 600489 states and 1905409 transitions. Word has length 50 [2022-09-16 10:39:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-09-16 10:39:41,918 INFO L495 AbstractCegarLoop]: Abstraction has 600489 states and 1905409 transitions. [2022-09-16 10:39:41,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 25.0) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-16 10:39:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 600489 states and 1905409 transitions. [2022-09-16 10:39:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-09-16 10:39:41,949 INFO L187 NwaCegarLoop]: Found error trace [2022-09-16 10:39:41,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 10:39:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-16 10:39:41,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2022-09-16 10:39:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 10:39:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash -318950411, now seen corresponding path program 1 times [2022-09-16 10:39:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 10:39:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646855038] [2022-09-16 10:39:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 10:39:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 10:39:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 10:39:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 10:39:42,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 10:39:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646855038] [2022-09-16 10:39:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646855038] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 10:39:42,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 10:39:42,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-09-16 10:39:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051161432] [2022-09-16 10:39:42,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 10:39:42,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-16 10:39:42,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 10:39:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-16 10:39:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-09-16 10:39:42,463 INFO L87 Difference]: Start difference. First operand 600489 states and 1905409 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)