/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20/send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-06 21:33:28,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-06 21:33:28,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-06 21:33:28,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-06 21:33:28,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-06 21:33:28,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-06 21:33:28,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-06 21:33:28,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-06 21:33:28,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-06 21:33:28,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-06 21:33:28,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-06 21:33:28,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-06 21:33:28,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-06 21:33:28,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-06 21:33:28,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-06 21:33:28,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-06 21:33:28,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-06 21:33:28,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-06 21:33:28,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-06 21:33:28,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-06 21:33:28,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-06 21:33:28,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-06 21:33:28,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-06 21:33:28,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-06 21:33:28,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-06 21:33:28,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-06 21:33:28,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-06 21:33:28,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-06 21:33:28,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-06 21:33:28,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-06 21:33:28,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-06 21:33:28,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-06 21:33:28,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-06 21:33:28,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-06 21:33:28,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-06 21:33:28,519 INFO L138 SettingsManager]: * Use SBE=true [2021-10-06 21:33:28,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-06 21:33:28,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-06 21:33:28,520 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-06 21:33:28,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-06 21:33:28,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-06 21:33:28,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-06 21:33:28,522 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-06 21:33:28,522 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-06 21:33:28,523 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-06 21:33:28,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-06 21:33:28,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-06 21:33:28,523 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-06 21:33:28,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-06 21:33:28,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-06 21:33:28,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-06 21:33:28,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-06 21:33:28,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-06 21:33:28,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-06 21:33:28,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:33:28,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-06 21:33:28,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-06 21:33:28,525 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-06 21:33:28,526 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-06 21:33:28,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-06 21:33:28,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-06 21:33:28,526 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-06 21:33:28,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-06 21:33:28,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-06 21:33:28,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-06 21:33:28,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-06 21:33:28,938 INFO L275 PluginConnector]: CDTParser initialized [2021-10-06 21:33:28,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/send-receive-alt.wvr.c [2021-10-06 21:33:29,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c795b5d95/c78919eecdeb48cc95eb854150591183/FLAG72debad0e [2021-10-06 21:33:29,742 INFO L306 CDTParser]: Found 1 translation units. [2021-10-06 21:33:29,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/send-receive-alt.wvr.c [2021-10-06 21:33:29,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c795b5d95/c78919eecdeb48cc95eb854150591183/FLAG72debad0e [2021-10-06 21:33:30,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c795b5d95/c78919eecdeb48cc95eb854150591183 [2021-10-06 21:33:30,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-06 21:33:30,110 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-06 21:33:30,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-06 21:33:30,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-06 21:33:30,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-06 21:33:30,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f390df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30, skipping insertion in model container [2021-10-06 21:33:30,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-06 21:33:30,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 21:33:30,385 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/send-receive-alt.wvr.c[2460,2473] [2021-10-06 21:33:30,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:33:30,408 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-06 21:33:30,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 21:33:30,431 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/send-receive-alt.wvr.c[2460,2473] [2021-10-06 21:33:30,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:33:30,441 INFO L203 MainTranslator]: Completed pre-run [2021-10-06 21:33:30,468 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/send-receive-alt.wvr.c[2460,2473] [2021-10-06 21:33:30,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:33:30,491 INFO L208 MainTranslator]: Completed translation [2021-10-06 21:33:30,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30 WrapperNode [2021-10-06 21:33:30,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-06 21:33:30,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-06 21:33:30,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-06 21:33:30,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-06 21:33:30,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-06 21:33:30,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-06 21:33:30,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-06 21:33:30,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-06 21:33:30,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-06 21:33:30,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-06 21:33:30,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-06 21:33:30,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-06 21:33:30,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (1/1) ... [2021-10-06 21:33:30,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:33:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 21:33:30,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-06 21:33:30,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-06 21:33:30,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-06 21:33:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-06 21:33:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-06 21:33:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-06 21:33:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-06 21:33:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-06 21:33:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-06 21:33:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-06 21:33:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-06 21:33:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-06 21:33:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-06 21:33:30,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-06 21:33:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-06 21:33:30,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-06 21:33:30,706 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-06 21:33:31,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-06 21:33:31,792 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-06 21:33:31,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:33:31 BoogieIcfgContainer [2021-10-06 21:33:31,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-06 21:33:31,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-06 21:33:31,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-06 21:33:31,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-06 21:33:31,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 09:33:30" (1/3) ... [2021-10-06 21:33:31,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3767845e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:33:31, skipping insertion in model container [2021-10-06 21:33:31,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:33:30" (2/3) ... [2021-10-06 21:33:31,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3767845e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:33:31, skipping insertion in model container [2021-10-06 21:33:31,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:33:31" (3/3) ... [2021-10-06 21:33:31,805 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.c [2021-10-06 21:33:31,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-06 21:33:31,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-06 21:33:31,813 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-06 21:33:31,855 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,856 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,856 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,856 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,857 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,858 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,858 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,858 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,859 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,859 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,860 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,861 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,861 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,862 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,862 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,863 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,865 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,866 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,867 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,869 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,870 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,870 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,870 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,870 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,871 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,871 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,871 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,872 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,872 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,872 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,872 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,873 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,874 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,874 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,874 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,875 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,875 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,875 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,876 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,876 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,876 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,877 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,878 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,878 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,879 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,879 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,880 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,880 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,880 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,880 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,881 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,881 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,884 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,885 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,885 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,886 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,886 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,886 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,886 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,887 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,887 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,887 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,890 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,891 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,892 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,893 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,893 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,893 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:33:31,898 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-06 21:33:31,970 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-06 21:33:31,983 INFO L339 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=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-06 21:33:31,984 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-10-06 21:33:32,009 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-06 21:33:32,025 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 125 transitions, 266 flow [2021-10-06 21:33:32,037 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 125 transitions, 266 flow [2021-10-06 21:33:32,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 122 places, 125 transitions, 266 flow [2021-10-06 21:33:32,126 INFO L129 PetriNetUnfolder]: 10/123 cut-off events. [2021-10-06 21:33:32,126 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-06 21:33:32,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 123 events. 10/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 147 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2021-10-06 21:33:32,138 INFO L116 LiptonReduction]: Number of co-enabled transitions 1070 [2021-10-06 21:33:51,591 INFO L131 LiptonReduction]: Checked pairs total: 1425 [2021-10-06 21:33:51,592 INFO L133 LiptonReduction]: Total number of compositions: 136 [2021-10-06 21:33:51,607 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 36 transitions, 88 flow [2021-10-06 21:33:51,631 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 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) [2021-10-06 21:33:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 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) [2021-10-06 21:33:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-06 21:33:51,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:51,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-06 21:33:51,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-06 21:33:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash 18176, now seen corresponding path program 1 times [2021-10-06 21:33:51,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:51,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477718456] [2021-10-06 21:33:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:33:51,669 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:51,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:51,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:33:51,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-06 21:33:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:33:51,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:33:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:33:52,190 INFO L354 Elim1Store]: treesize reduction 151, result has 21.8 percent of original size [2021-10-06 21:33:52,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 73 [2021-10-06 21:33:52,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 93 [2021-10-06 21:33:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:33:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:52,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:33:52,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477718456] [2021-10-06 21:33:52,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477718456] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:33:52,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:33:52,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:33:52,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38222824] [2021-10-06 21:33:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:33:52,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:33:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:33:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:33:52,781 INFO L87 Difference]: Start difference. First operand has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-06 21:33:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:33:52,949 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2021-10-06 21:33:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:33:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 2 [2021-10-06 21:33:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:33:52,965 INFO L225 Difference]: With dead ends: 136 [2021-10-06 21:33:52,965 INFO L226 Difference]: Without dead ends: 136 [2021-10-06 21:33:52,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:33:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-06 21:33:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-06 21:33:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 87 states have (on average 3.689655172413793) internal successors, (321), 135 states have internal predecessors, (321), 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) [2021-10-06 21:33:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 321 transitions. [2021-10-06 21:33:53,023 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 321 transitions. Word has length 2 [2021-10-06 21:33:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:33:53,025 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 321 transitions. [2021-10-06 21:33:53,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-06 21:33:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 321 transitions. [2021-10-06 21:33:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-06 21:33:53,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:53,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-06 21:33:53,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:53,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:33:53,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-06 21:33:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 18177, now seen corresponding path program 1 times [2021-10-06 21:33:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:53,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034409509] [2021-10-06 21:33:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:33:53,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:53,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:53,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:33:53,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-06 21:33:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:33:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:33:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:33:53,551 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-06 21:33:53,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 261 [2021-10-06 21:33:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:55,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:33:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:55,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:33:55,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034409509] [2021-10-06 21:33:55,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034409509] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:33:55,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:33:55,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:33:55,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940488849] [2021-10-06 21:33:55,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:33:55,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:33:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:33:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:33:55,103 INFO L87 Difference]: Start difference. First operand 136 states and 321 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-06 21:33:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:33:55,185 INFO L93 Difference]: Finished difference Result 107 states and 236 transitions. [2021-10-06 21:33:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:33:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 2 [2021-10-06 21:33:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:33:55,189 INFO L225 Difference]: With dead ends: 107 [2021-10-06 21:33:55,189 INFO L226 Difference]: Without dead ends: 107 [2021-10-06 21:33:55,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:33:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-06 21:33:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-06 21:33:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 74 states have (on average 3.189189189189189) internal successors, (236), 106 states have internal predecessors, (236), 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) [2021-10-06 21:33:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 236 transitions. [2021-10-06 21:33:55,202 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 236 transitions. Word has length 2 [2021-10-06 21:33:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:33:55,203 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 236 transitions. [2021-10-06 21:33:55,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-06 21:33:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 236 transitions. [2021-10-06 21:33:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-06 21:33:55,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:55,204 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-06 21:33:55,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:55,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:33:55,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-06 21:33:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash 18130, now seen corresponding path program 1 times [2021-10-06 21:33:55,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:55,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644946946] [2021-10-06 21:33:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:33:55,424 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:55,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:55,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:33:55,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-06 21:33:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:33:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 21:33:55,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:33:55,608 INFO L354 Elim1Store]: treesize reduction 232, result has 18.9 percent of original size [2021-10-06 21:33:55,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 59 [2021-10-06 21:33:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:56,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:33:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:56,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:33:56,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644946946] [2021-10-06 21:33:56,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644946946] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:33:56,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:33:56,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:33:56,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736420753] [2021-10-06 21:33:56,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:33:56,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:33:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:33:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:33:56,010 INFO L87 Difference]: Start difference. First operand 107 states and 236 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2021-10-06 21:33:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:33:56,081 INFO L93 Difference]: Finished difference Result 106 states and 235 transitions. [2021-10-06 21:33:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:33:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-10-06 21:33:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:33:56,084 INFO L225 Difference]: With dead ends: 106 [2021-10-06 21:33:56,084 INFO L226 Difference]: Without dead ends: 106 [2021-10-06 21:33:56,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:33:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-06 21:33:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-06 21:33:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 74 states have (on average 3.175675675675676) internal successors, (235), 105 states have internal predecessors, (235), 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) [2021-10-06 21:33:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 235 transitions. [2021-10-06 21:33:56,094 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 235 transitions. Word has length 2 [2021-10-06 21:33:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:33:56,094 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 235 transitions. [2021-10-06 21:33:56,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2021-10-06 21:33:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 235 transitions. [2021-10-06 21:33:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-06 21:33:56,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:56,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-06 21:33:56,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:56,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:33:56,309 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread2Err0REQUIRES_VIOLATION, thread2Err1REQUIRES_VIOLATION (and 22 more)] === [2021-10-06 21:33:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 18131, now seen corresponding path program 1 times [2021-10-06 21:33:56,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:56,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278407947] [2021-10-06 21:33:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:33:56,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:56,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-06 21:33:56,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-06 21:33:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-06 21:33:56,364 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-06 21:33:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-06 21:33:56,427 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-06 21:33:56,427 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-06 21:33:56,428 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-06 21:33:56,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-06 21:33:56,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-06 21:33:56,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-06 21:33:56,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-06 21:33:56,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-06 21:33:56,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-06 21:33:56,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-06 21:33:56,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-06 21:33:56,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-06 21:33:56,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-06 21:33:56,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-06 21:33:56,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-06 21:33:56,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-06 21:33:56,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-06 21:33:56,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-06 21:33:56,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK [2021-10-06 21:33:56,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK [2021-10-06 21:33:56,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-06 21:33:56,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-06 21:33:56,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATION [2021-10-06 21:33:56,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATION [2021-10-06 21:33:56,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATION [2021-10-06 21:33:56,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATION [2021-10-06 21:33:56,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2REQUIRES_VIOLATION [2021-10-06 21:33:56,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3REQUIRES_VIOLATION [2021-10-06 21:33:56,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:56,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-06 21:33:56,655 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-06 21:33:56,656 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-06 21:33:56,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.10 09:33:56 BasicIcfg [2021-10-06 21:33:56,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-06 21:33:56,676 INFO L168 Benchmark]: Toolchain (without parser) took 26575.01 ms. Allocated memory was 152.0 MB in the beginning and 200.3 MB in the end (delta: 48.2 MB). Free memory was 126.6 MB in the beginning and 73.3 MB in the end (delta: 53.3 MB). Peak memory consumption was 102.2 MB. Max. memory is 8.0 GB. [2021-10-06 21:33:56,676 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-06 21:33:56,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.39 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 113.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-10-06 21:33:56,678 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.14 ms. Allocated memory is still 152.0 MB. Free memory was 113.1 MB in the beginning and 111.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-06 21:33:56,678 INFO L168 Benchmark]: Boogie Preprocessor took 37.01 ms. Allocated memory is still 152.0 MB. Free memory was 111.3 MB in the beginning and 109.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-06 21:33:56,679 INFO L168 Benchmark]: RCFGBuilder took 1214.33 ms. Allocated memory is still 152.0 MB. Free memory was 109.6 MB in the beginning and 119.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2021-10-06 21:33:56,680 INFO L168 Benchmark]: TraceAbstraction took 24876.82 ms. Allocated memory was 152.0 MB in the beginning and 200.3 MB in the end (delta: 48.2 MB). Free memory was 118.8 MB in the beginning and 73.3 MB in the end (delta: 45.5 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2021-10-06 21:33:56,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 377.39 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 113.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.14 ms. Allocated memory is still 152.0 MB. Free memory was 113.1 MB in the beginning and 111.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.01 ms. Allocated memory is still 152.0 MB. Free memory was 111.3 MB in the beginning and 109.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1214.33 ms. Allocated memory is still 152.0 MB. Free memory was 109.6 MB in the beginning and 119.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24876.82 ms. Allocated memory was 152.0 MB in the beginning and 200.3 MB in the end (delta: 48.2 MB). Free memory was 118.8 MB in the beginning and 73.3 MB in the end (delta: 45.5 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19554.6ms, 122 PlacesBefore, 40 PlacesAfterwards, 125 TransitionsBefore, 36 TransitionsAfterwards, 1070 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 7 ChoiceCompositions, 136 TotalNumberOfCompositions, 1425 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1401, positive: 1383, positive conditional: 0, positive unconditional: 1383, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 607, positive: 601, positive conditional: 0, positive unconditional: 601, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 607, positive: 597, positive conditional: 0, positive unconditional: 597, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1509, positive: 949, positive conditional: 0, positive unconditional: 949, negative: 560, negative conditional: 0, negative unconditional: 560, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1401, positive: 782, positive conditional: 0, positive unconditional: 782, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 607, unknown conditional: 0, unknown unconditional: 607] , Statistics on independence cache: Total cache size (in pairs): 50, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 95]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L38] int *queue; [L39] int front, back, sum, n; [L73] pthread_t t1, t2, t3; [L75] n = __VERIFIER_nondet_int() [L76] front = __VERIFIER_nondet_int() [L77] back = front [L35] COND FALSE !(!cond) [L93] int* arr = (int*)malloc(sizeof(int) * size); [L94] int i = 0; VAL [back=5, front=5, n=1073741824, queue={0:0}, sum=0] [L94] COND TRUE i < size [L95] arr[i] = __VERIFIER_nondet_int() - UnprovableResult [Line: 47]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 47]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 59]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 59]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 64]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 64]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 95]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 81]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 81]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 82]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 82]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 83]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 83]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 84]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 84]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 87]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 72]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 81]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 82]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 24684.1ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 15.7ms, AutomataDifference: 369.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19647.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 138 SDslu, 0 SDs, 0 SdLazy, 41 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 237.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 60.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 45.8ms SsaConstructionTime, 119.0ms SatisfiabilityAnalysisTime, 3271.5ms InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 6 ConstructedInterpolants, 2 QuantifiedInterpolants, 138 SizeOfPredicates, 14 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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! [2021-10-06 21:33:56,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...