/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-22 01:18:57,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-22 01:18:57,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-22 01:18:57,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-22 01:18:57,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-22 01:18:57,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-22 01:18:57,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-22 01:18:57,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-22 01:18:57,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-22 01:18:57,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-22 01:18:57,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-22 01:18:57,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-22 01:18:57,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-22 01:18:57,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-22 01:18:57,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-22 01:18:57,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-22 01:18:57,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-22 01:18:57,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-22 01:18:57,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-22 01:18:57,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-22 01:18:57,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-22 01:18:57,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-22 01:18:57,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-22 01:18:57,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-22 01:18:57,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-22 01:18:57,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-22 01:18:57,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-22 01:18:57,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-22 01:18:57,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-22 01:18:57,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-22 01:18:57,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-22 01:18:57,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-22 01:18:57,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-22 01:18:57,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-22 01:18:57,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-22 01:18:57,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-22 01:18:57,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf [2020-10-22 01:18:57,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-22 01:18:57,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-22 01:18:57,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-22 01:18:57,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-22 01:18:57,755 INFO L138 SettingsManager]: * Use SBE=true [2020-10-22 01:18:57,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-22 01:18:57,755 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-22 01:18:57,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-22 01:18:57,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-22 01:18:57,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-22 01:18:57,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-22 01:18:57,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-22 01:18:57,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-22 01:18:57,758 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-22 01:18:57,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-22 01:18:57,758 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-22 01:18:57,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-22 01:18:57,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-22 01:18:57,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-22 01:18:57,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-22 01:18:57,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-22 01:18:57,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:18:57,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-22 01:18:57,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-22 01:18:57,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-22 01:18:57,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-22 01:18:57,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-22 01:18:57,760 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-22 01:18:57,760 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-22 01:18:57,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-22 01:18:57,761 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-22 01:18:58,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-22 01:18:58,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-22 01:18:58,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-22 01:18:58,063 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-22 01:18:58,064 INFO L275 PluginConnector]: CDTParser initialized [2020-10-22 01:18:58,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-10-22 01:18:58,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/820e536c7/8fa6728884af4940877a96c0e690fcfb/FLAG01b8acf2b [2020-10-22 01:18:58,639 INFO L306 CDTParser]: Found 1 translation units. [2020-10-22 01:18:58,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-10-22 01:18:58,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/820e536c7/8fa6728884af4940877a96c0e690fcfb/FLAG01b8acf2b [2020-10-22 01:18:58,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/820e536c7/8fa6728884af4940877a96c0e690fcfb [2020-10-22 01:18:58,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-22 01:18:58,996 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-22 01:18:58,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-22 01:18:58,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-22 01:18:59,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-22 01:18:59,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:18:58" (1/1) ... [2020-10-22 01:18:59,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc43989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59, skipping insertion in model container [2020-10-22 01:18:59,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:18:58" (1/1) ... [2020-10-22 01:18:59,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-22 01:18:59,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-22 01:18:59,370 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-22 01:18:59,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:18:59,563 INFO L203 MainTranslator]: Completed pre-run [2020-10-22 01:18:59,593 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-22 01:18:59,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:18:59,719 INFO L208 MainTranslator]: Completed translation [2020-10-22 01:18:59,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59 WrapperNode [2020-10-22 01:18:59,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-22 01:18:59,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-22 01:18:59,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-22 01:18:59,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-22 01:18:59,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-22 01:18:59,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-22 01:18:59,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-22 01:18:59,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-22 01:18:59,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... [2020-10-22 01:18:59,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-22 01:18:59,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-22 01:18:59,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-22 01:18:59,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-22 01:18:59,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:18:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-22 01:18:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-22 01:18:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-22 01:18:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-10-22 01:18:59,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-10-22 01:18:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-22 01:18:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-22 01:18:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-22 01:18:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-22 01:18:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-22 01:18:59,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-22 01:18:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-10-22 01:18:59,865 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-10-22 01:18:59,867 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-22 01:19:00,355 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-22 01:19:00,355 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-22 01:19:00,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:19:00 BoogieIcfgContainer [2020-10-22 01:19:00,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-22 01:19:00,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-22 01:19:00,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-22 01:19:00,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-22 01:19:00,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 01:18:58" (1/3) ... [2020-10-22 01:19:00,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ad709a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:19:00, skipping insertion in model container [2020-10-22 01:19:00,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:59" (2/3) ... [2020-10-22 01:19:00,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ad709a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:19:00, skipping insertion in model container [2020-10-22 01:19:00,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:19:00" (3/3) ... [2020-10-22 01:19:00,369 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-10-22 01:19:00,380 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-22 01:19:00,380 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-22 01:19:00,388 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-22 01:19:00,389 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-22 01:19:00,433 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,433 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,434 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,434 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,434 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,435 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,435 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,436 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,437 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,437 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,437 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,437 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,438 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,438 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,438 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,438 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,438 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,439 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,439 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,440 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,441 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,441 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,441 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,441 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,442 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,442 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,442 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,442 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,442 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,443 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,443 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,443 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,444 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,445 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,445 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,446 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,446 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,446 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,447 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,448 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,448 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,448 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,448 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,449 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,449 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,449 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,449 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,450 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,450 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,450 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,450 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,450 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,451 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,451 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,455 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,455 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,456 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,456 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,456 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,456 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,461 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,461 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,461 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,461 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,462 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,462 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,462 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,462 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,462 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,471 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,472 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,472 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,472 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,472 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,472 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,477 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,478 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,478 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,478 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,478 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,479 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,479 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,479 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,479 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:19:00,513 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2020-10-22 01:19:00,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-22 01:19:00,541 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-22 01:19:00,541 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-22 01:19:00,542 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-22 01:19:00,542 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-22 01:19:00,542 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-22 01:19:00,542 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-22 01:19:00,542 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-22 01:19:00,542 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-22 01:19:00,556 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-22 01:19:00,557 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 102 transitions, 272 flow [2020-10-22 01:19:00,559 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 102 transitions, 272 flow [2020-10-22 01:19:00,561 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 103 places, 102 transitions, 272 flow [2020-10-22 01:19:00,625 INFO L129 PetriNetUnfolder]: 17/136 cut-off events. [2020-10-22 01:19:00,626 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-10-22 01:19:00,632 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 17/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 315 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 89. Up to 12 conditions per place. [2020-10-22 01:19:00,652 INFO L116 LiptonReduction]: Number of co-enabled transitions 2274 [2020-10-22 01:19:02,372 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-10-22 01:19:02,608 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-22 01:19:02,633 INFO L131 LiptonReduction]: Checked pairs total: 14874 [2020-10-22 01:19:02,634 INFO L133 LiptonReduction]: Total number of compositions: 45 [2020-10-22 01:19:02,640 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 57 transitions, 182 flow [2020-10-22 01:19:03,052 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5381 states. [2020-10-22 01:19:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states. [2020-10-22 01:19:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-22 01:19:03,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:03,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:03,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-22 01:19:03,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:03,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1957418352, now seen corresponding path program 1 times [2020-10-22 01:19:03,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:03,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177877068] [2020-10-22 01:19:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:03,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177877068] [2020-10-22 01:19:03,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:19:03,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:19:03,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1144423195] [2020-10-22 01:19:03,359 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:03,363 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:03,378 INFO L252 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-10-22 01:19:03,379 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:03,386 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:03,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-22 01:19:03,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-22 01:19:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-22 01:19:03,406 INFO L87 Difference]: Start difference. First operand 5381 states. Second operand 4 states. [2020-10-22 01:19:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:03,698 INFO L93 Difference]: Finished difference Result 10812 states and 36249 transitions. [2020-10-22 01:19:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-22 01:19:03,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-22 01:19:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:03,779 INFO L225 Difference]: With dead ends: 10812 [2020-10-22 01:19:03,779 INFO L226 Difference]: Without dead ends: 7730 [2020-10-22 01:19:03,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:19:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7730 states. [2020-10-22 01:19:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7730 to 5052. [2020-10-22 01:19:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5052 states. [2020-10-22 01:19:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 17159 transitions. [2020-10-22 01:19:04,142 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 17159 transitions. Word has length 8 [2020-10-22 01:19:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:04,143 INFO L481 AbstractCegarLoop]: Abstraction has 5052 states and 17159 transitions. [2020-10-22 01:19:04,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-22 01:19:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 17159 transitions. [2020-10-22 01:19:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-22 01:19:04,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:04,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:04,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-22 01:19:04,146 INFO L429 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-22 01:19:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash -102403622, now seen corresponding path program 1 times [2020-10-22 01:19:04,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:04,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397753791] [2020-10-22 01:19:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:04,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397753791] [2020-10-22 01:19:04,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:19:04,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:19:04,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1500974532] [2020-10-22 01:19:04,243 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:04,244 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:04,246 INFO L252 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-10-22 01:19:04,246 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,266 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:04,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-22 01:19:04,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-22 01:19:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-22 01:19:04,268 INFO L87 Difference]: Start difference. First operand 5052 states and 17159 transitions. Second operand 3 states. [2020-10-22 01:19:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:04,341 INFO L93 Difference]: Finished difference Result 4317 states and 12958 transitions. [2020-10-22 01:19:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-22 01:19:04,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-22 01:19:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:04,370 INFO L225 Difference]: With dead ends: 4317 [2020-10-22 01:19:04,370 INFO L226 Difference]: Without dead ends: 4275 [2020-10-22 01:19:04,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-22 01:19:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-10-22 01:19:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4275. [2020-10-22 01:19:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4275 states. [2020-10-22 01:19:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 12848 transitions. [2020-10-22 01:19:04,571 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 12848 transitions. Word has length 10 [2020-10-22 01:19:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:04,571 INFO L481 AbstractCegarLoop]: Abstraction has 4275 states and 12848 transitions. [2020-10-22 01:19:04,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-22 01:19:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 12848 transitions. [2020-10-22 01:19:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-22 01:19:04,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:04,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:04,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-22 01:19:04,574 INFO L429 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-22 01:19:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash -115218448, now seen corresponding path program 2 times [2020-10-22 01:19:04,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:04,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105855674] [2020-10-22 01:19:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105855674] [2020-10-22 01:19:04,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:19:04,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:19:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [21516181] [2020-10-22 01:19:04,659 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:04,659 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:04,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-10-22 01:19:04,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,679 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44664#(not (= ~r~0 0))] [2020-10-22 01:19:04,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-22 01:19:04,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-22 01:19:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:19:04,680 INFO L87 Difference]: Start difference. First operand 4275 states and 12848 transitions. Second operand 5 states. [2020-10-22 01:19:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:04,739 INFO L93 Difference]: Finished difference Result 2906 states and 7004 transitions. [2020-10-22 01:19:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-22 01:19:04,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-22 01:19:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:04,755 INFO L225 Difference]: With dead ends: 2906 [2020-10-22 01:19:04,755 INFO L226 Difference]: Without dead ends: 2798 [2020-10-22 01:19:04,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:19:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2020-10-22 01:19:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2390. [2020-10-22 01:19:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2390 states. [2020-10-22 01:19:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 5909 transitions. [2020-10-22 01:19:04,824 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 5909 transitions. Word has length 10 [2020-10-22 01:19:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:04,825 INFO L481 AbstractCegarLoop]: Abstraction has 2390 states and 5909 transitions. [2020-10-22 01:19:04,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-22 01:19:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 5909 transitions. [2020-10-22 01:19:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:19:04,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:04,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:04,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-22 01:19:04,827 INFO L429 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-22 01:19:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -485494678, now seen corresponding path program 1 times [2020-10-22 01:19:04,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:04,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697983965] [2020-10-22 01:19:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:04,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697983965] [2020-10-22 01:19:04,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:19:04,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:19:04,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1709345174] [2020-10-22 01:19:04,870 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:04,871 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:04,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-10-22 01:19:04,872 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,873 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:04,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-22 01:19:04,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-22 01:19:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-22 01:19:04,874 INFO L87 Difference]: Start difference. First operand 2390 states and 5909 transitions. Second operand 4 states. [2020-10-22 01:19:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:04,982 INFO L93 Difference]: Finished difference Result 2639 states and 6454 transitions. [2020-10-22 01:19:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-22 01:19:04,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-22 01:19:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:04,989 INFO L225 Difference]: With dead ends: 2639 [2020-10-22 01:19:04,989 INFO L226 Difference]: Without dead ends: 1900 [2020-10-22 01:19:04,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:19:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-10-22 01:19:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1546. [2020-10-22 01:19:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-22 01:19:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3824 transitions. [2020-10-22 01:19:05,029 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3824 transitions. Word has length 12 [2020-10-22 01:19:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:05,031 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 3824 transitions. [2020-10-22 01:19:05,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-22 01:19:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3824 transitions. [2020-10-22 01:19:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:05,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:05,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:05,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-22 01:19:05,034 INFO L429 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-22 01:19:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:05,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1611753158, now seen corresponding path program 1 times [2020-10-22 01:19:05,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:05,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184183714] [2020-10-22 01:19:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:05,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184183714] [2020-10-22 01:19:05,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:19:05,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-22 01:19:05,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947744420] [2020-10-22 01:19:05,102 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:05,104 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:05,111 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 74 transitions. [2020-10-22 01:19:05,111 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:05,333 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58094#(not (= ~r~0 0))] [2020-10-22 01:19:05,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:19:05,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:05,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:19:05,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:19:05,334 INFO L87 Difference]: Start difference. First operand 1546 states and 3824 transitions. Second operand 7 states. [2020-10-22 01:19:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:05,436 INFO L93 Difference]: Finished difference Result 1759 states and 4308 transitions. [2020-10-22 01:19:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-22 01:19:05,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-22 01:19:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:05,447 INFO L225 Difference]: With dead ends: 1759 [2020-10-22 01:19:05,447 INFO L226 Difference]: Without dead ends: 1641 [2020-10-22 01:19:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:19:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-10-22 01:19:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1509. [2020-10-22 01:19:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1509 states. [2020-10-22 01:19:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 3739 transitions. [2020-10-22 01:19:05,491 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 3739 transitions. Word has length 20 [2020-10-22 01:19:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:05,491 INFO L481 AbstractCegarLoop]: Abstraction has 1509 states and 3739 transitions. [2020-10-22 01:19:05,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:19:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 3739 transitions. [2020-10-22 01:19:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:05,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:05,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:05,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-22 01:19:05,494 INFO L429 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-22 01:19:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash 290002040, now seen corresponding path program 2 times [2020-10-22 01:19:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:05,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983273144] [2020-10-22 01:19:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-22 01:19:05,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-22 01:19:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-22 01:19:05,535 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-22 01:19:05,563 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-22 01:19:05,564 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-22 01:19:05,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-22 01:19:05,579 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-22 01:19:05,579 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-22 01:19:05,580 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-22 01:19:05,580 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-22 01:19:05,581 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-22 01:19:05,581 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: { int l; __VERIFIER_atomic_take_read_lock(); __VERIFIER_atomic_begin(); l = x; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); y = l; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); if (!(y == x)) ERROR: reach_error(); __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); l = r-1; __VERIFIER_atomic_end(); __VERIFIER_atomic_begin(); r = l; __VERIFIER_atomic_end(); return 0; } [719-738] [2020-10-22 01:19:05,582 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-22 01:19:05,582 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-22 01:19:05,582 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-22 01:19:05,582 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-22 01:19:05,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 01:19:05 BasicIcfg [2020-10-22 01:19:05,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-22 01:19:05,617 INFO L168 Benchmark]: Toolchain (without parser) took 6625.97 ms. Allocated memory was 141.6 MB in the beginning and 331.4 MB in the end (delta: 189.8 MB). Free memory was 102.1 MB in the beginning and 207.3 MB in the end (delta: -105.2 MB). Peak memory consumption was 84.5 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,618 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.82 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 159.9 MB in the end (delta: -58.6 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.16 ms. Allocated memory is still 204.5 MB. Free memory was 159.9 MB in the beginning and 157.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,620 INFO L168 Benchmark]: Boogie Preprocessor took 27.08 ms. Allocated memory is still 204.5 MB. Free memory was 157.3 MB in the beginning and 156.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,621 INFO L168 Benchmark]: RCFGBuilder took 560.24 ms. Allocated memory is still 204.5 MB. Free memory was 155.4 MB in the beginning and 121.9 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,622 INFO L168 Benchmark]: TraceAbstraction took 5255.99 ms. Allocated memory was 204.5 MB in the beginning and 331.4 MB in the end (delta: 126.9 MB). Free memory was 121.2 MB in the beginning and 207.3 MB in the end (delta: -86.1 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:05,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 722.82 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 159.9 MB in the end (delta: -58.6 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.16 ms. Allocated memory is still 204.5 MB. Free memory was 159.9 MB in the beginning and 157.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.08 ms. Allocated memory is still 204.5 MB. Free memory was 157.3 MB in the beginning and 156.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 560.24 ms. Allocated memory is still 204.5 MB. Free memory was 155.4 MB in the beginning and 121.9 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5255.99 ms. Allocated memory was 204.5 MB in the beginning and 331.4 MB in the end (delta: 126.9 MB). Free memory was 121.2 MB in the beginning and 207.3 MB in the end (delta: -86.1 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1183 VarBasedMoverChecksPositive, 32 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 418 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 103 PlacesBefore, 58 PlacesAfterwards, 102 TransitionsBefore, 57 TransitionsAfterwards, 2274 CoEnabledTransitionPairs, 5 FixpointIterations, 27 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 45 TotalNumberOfCompositions, 14874 MoverChecksTotal - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L740] 0 pthread_t t1, t2, t3, t4; [L741] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L742] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L720] 2 int l; [L721] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND TRUE 2 !cond [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L721] RET 2 __VERIFIER_atomic_take_read_lock() [L723] 2 l = x VAL [r=1, w=0, x=0, y=0] [L726] 2 y = l VAL [r=1, w=0, x=0, y=0] [L729] COND TRUE 2 !(y == x) [L16] COND TRUE 2 0 VAL [r=1, w=0, x=0, y=0] [L732] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L743] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L744] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L720] 4 int l; [L721] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND TRUE 4 !cond [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L721] RET 4 __VERIFIER_atomic_take_read_lock() [L735] 2 r = l [L737] 2 return 0; [L714] CALL 3 __VERIFIER_atomic_take_write_lock() [L706] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND TRUE 3 !cond [L706] RET 3 assume_abort_if_not(w==0 && r==0) [L707] 3 w = 1 [L714] RET 3 __VERIFIER_atomic_take_write_lock() [L723] 4 l = x VAL [r=0, w=1, x=0, y=0] [L726] 4 y = l VAL [r=0, w=1, x=0, y=0] [L715] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L729] COND TRUE 4 !(y == x) [L16] COND FALSE 4 !(0) [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 432 SDtfs, 403 SDslu, 638 SDs, 0 SdLazy, 167 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5381occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 5 MinimizatonAttempts, 3572 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1479 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...