/usr/bin/java -Xmx16000000000 -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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/concurrent/pthreads/predecessorInAtomicBlockBug.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 02:42:37,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 02:42:37,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 02:42:37,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 02:42:37,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 02:42:38,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 02:42:38,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 02:42:38,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 02:42:38,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 02:42:38,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 02:42:38,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 02:42:38,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 02:42:38,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 02:42:38,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 02:42:38,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 02:42:38,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 02:42:38,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 02:42:38,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 02:42:38,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 02:42:38,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 02:42:38,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 02:42:38,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 02:42:38,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 02:42:38,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 02:42:38,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 02:42:38,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 02:42:38,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 02:42:38,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 02:42:38,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 02:42:38,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 02:42:38,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 02:42:38,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 02:42:38,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 02:42:38,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 02:42:38,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 02:42:38,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 02:42:38,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 02:42:38,054 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 02:42:38,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 02:42:38,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 02:42:38,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 02:42:38,056 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 02:42:38,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 02:42:38,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 02:42:38,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 02:42:38,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 02:42:38,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 02:42:38,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 02:42:38,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 02:42:38,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 02:42:38,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 02:42:38,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 02:42:38,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 02:42:38,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 02:42:38,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 02:42:38,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 02:42:38,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 02:42:38,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 02:42:38,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:42:38,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 02:42:38,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 02:42:38,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 02:42:38,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 02:42:38,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 02:42:38,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 02:42:38,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 02:42:38,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 02:42:38,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 02:42:38,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 02:42:38,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 02:42:38,355 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 02:42:38,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/predecessorInAtomicBlockBug.c [2020-10-16 02:42:38,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/712b392b4/998c3cd4675243dca68b8d8dae5cc031/FLAG45559a433 [2020-10-16 02:42:38,847 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 02:42:38,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/predecessorInAtomicBlockBug.c [2020-10-16 02:42:38,847 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 02:42:38,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/712b392b4/998c3cd4675243dca68b8d8dae5cc031/FLAG45559a433 [2020-10-16 02:42:39,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/712b392b4/998c3cd4675243dca68b8d8dae5cc031 [2020-10-16 02:42:39,228 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 02:42:39,230 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 02:42:39,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 02:42:39,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 02:42:39,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 02:42:39,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5102d9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39, skipping insertion in model container [2020-10-16 02:42:39,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 02:42:39,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 02:42:39,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:42:39,450 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 02:42:39,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:42:39,560 INFO L208 MainTranslator]: Completed translation [2020-10-16 02:42:39,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39 WrapperNode [2020-10-16 02:42:39,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 02:42:39,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 02:42:39,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 02:42:39,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 02:42:39,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 02:42:39,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 02:42:39,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 02:42:39,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 02:42:39,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (1/1) ... [2020-10-16 02:42:39,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 02:42:39,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 02:42:39,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 02:42:39,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 02:42:39,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (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 [2020-10-16 02:42:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 02:42:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 02:42:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 02:42:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-16 02:42:39,667 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-16 02:42:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 02:42:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 02:42:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 02:42:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 02:42:39,670 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 02:42:39,858 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 02:42:39,859 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-16 02:42:39,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:42:39 BoogieIcfgContainer [2020-10-16 02:42:39,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 02:42:39,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 02:42:39,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 02:42:39,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 02:42:39,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:42:39" (1/3) ... [2020-10-16 02:42:39,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edeaec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:42:39, skipping insertion in model container [2020-10-16 02:42:39,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:39" (2/3) ... [2020-10-16 02:42:39,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edeaec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:42:39, skipping insertion in model container [2020-10-16 02:42:39,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:42:39" (3/3) ... [2020-10-16 02:42:39,869 INFO L111 eAbstractionObserver]: Analyzing ICFG predecessorInAtomicBlockBug.c [2020-10-16 02:42:39,881 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 02:42:39,891 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 02:42:39,892 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 02:42:39,932 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,933 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,933 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,933 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,934 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,935 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,944 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,944 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,945 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,945 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:42:39,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 02:42:40,000 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:42:40,000 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:42:40,000 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:42:40,001 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:42:40,001 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:42:40,001 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:42:40,001 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:42:40,001 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:42:40,012 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 49 flow [2020-10-16 02:42:40,036 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2020-10-16 02:42:40,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:42:40,038 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 21 events. 0/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-10-16 02:42:40,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 49 flow [2020-10-16 02:42:40,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 39 flow [2020-10-16 02:42:40,046 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:42:40,049 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 22 places, 18 transitions, 39 flow [2020-10-16 02:42:40,052 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 22 places, 18 transitions, 39 flow [2020-10-16 02:42:40,053 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 22 places, 18 transitions, 39 flow [2020-10-16 02:42:40,061 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-10-16 02:42:40,062 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:42:40,062 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 18 events. 0/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-10-16 02:42:40,063 INFO L117 LiptonReduction]: Number of co-enabled transitions 28 [2020-10-16 02:42:40,448 INFO L132 LiptonReduction]: Checked pairs total: 26 [2020-10-16 02:42:40,449 INFO L134 LiptonReduction]: Total number of compositions: 13 [2020-10-16 02:42:40,452 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 408 [2020-10-16 02:42:40,457 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2020-10-16 02:42:40,457 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:42:40,458 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:42:40,459 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2020-10-16 02:42:40,459 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 02:42:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:42:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash 91935, now seen corresponding path program 1 times [2020-10-16 02:42:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:42:40,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371343410] [2020-10-16 02:42:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:42:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:42:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:42:40,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371343410] [2020-10-16 02:42:40,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:42:40,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 02:42:40,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261256412] [2020-10-16 02:42:40,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:42:40,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:42:40,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:42:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:42:40,669 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 35 [2020-10-16 02:42:40,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 9 places, 5 transitions, 13 flow. Second operand 3 states. [2020-10-16 02:42:40,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:42:40,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 35 [2020-10-16 02:42:40,673 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:42:40,695 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:42:40,696 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:42:40,697 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 7 events. 1/7 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 1 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 10. Up to 6 conditions per place. [2020-10-16 02:42:40,699 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 2 changer transitions 0/5 dead transitions. [2020-10-16 02:42:40,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 5 transitions, 21 flow [2020-10-16 02:42:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:42:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:42:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2020-10-16 02:42:40,715 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7047619047619048 [2020-10-16 02:42:40,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 74 transitions. [2020-10-16 02:42:40,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 74 transitions. [2020-10-16 02:42:40,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:42:40,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 74 transitions. [2020-10-16 02:42:40,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:42:40,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:42:40,729 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:42:40,731 INFO L185 Difference]: Start difference. First operand has 9 places, 5 transitions, 13 flow. Second operand 3 states and 74 transitions. [2020-10-16 02:42:40,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 5 transitions, 21 flow [2020-10-16 02:42:40,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 5 transitions, 20 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:42:40,736 INFO L241 Difference]: Finished difference. Result has 11 places, 5 transitions, 20 flow [2020-10-16 02:42:40,738 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=5} [2020-10-16 02:42:40,739 INFO L342 CegarLoopForPetriNet]: 9 programPoint places, 2 predicate places. [2020-10-16 02:42:40,739 INFO L481 AbstractCegarLoop]: Abstraction has has 11 places, 5 transitions, 20 flow [2020-10-16 02:42:40,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:42:40,739 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:42:40,739 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:42:40,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 02:42:40,740 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 02:42:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:42:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2850191, now seen corresponding path program 1 times [2020-10-16 02:42:40,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:42:40,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549610708] [2020-10-16 02:42:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:42:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:42:40,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:42:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:42:40,768 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:42:40,789 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:42:40,790 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:42:40,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 02:42:40,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:42:40 BasicIcfg [2020-10-16 02:42:40,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 02:42:40,819 INFO L168 Benchmark]: Toolchain (without parser) took 1588.56 ms. Allocated memory was 251.1 MB in the beginning and 314.6 MB in the end (delta: 63.4 MB). Free memory was 206.1 MB in the beginning and 202.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 67.0 MB. Max. memory is 14.2 GB. [2020-10-16 02:42:40,820 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 02:42:40,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.43 ms. Allocated memory was 251.1 MB in the beginning and 314.6 MB in the end (delta: 63.4 MB). Free memory was 206.1 MB in the beginning and 289.8 MB in the end (delta: -83.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 14.2 GB. [2020-10-16 02:42:40,822 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 314.6 MB. Free memory was 289.8 MB in the beginning and 287.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 02:42:40,823 INFO L168 Benchmark]: Boogie Preprocessor took 18.78 ms. Allocated memory is still 314.6 MB. Free memory is still 287.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 02:42:40,824 INFO L168 Benchmark]: RCFGBuilder took 248.38 ms. Allocated memory is still 314.6 MB. Free memory was 287.3 MB in the beginning and 273.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.2 GB. [2020-10-16 02:42:40,824 INFO L168 Benchmark]: TraceAbstraction took 954.28 ms. Allocated memory is still 314.6 MB. Free memory was 271.0 MB in the beginning and 202.5 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 14.2 GB. [2020-10-16 02:42:40,829 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 330.43 ms. Allocated memory was 251.1 MB in the beginning and 314.6 MB in the end (delta: 63.4 MB). Free memory was 206.1 MB in the beginning and 289.8 MB in the end (delta: -83.8 MB). Peak memory consumption was 24.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 314.6 MB. Free memory was 289.8 MB in the beginning and 287.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 18.78 ms. Allocated memory is still 314.6 MB. Free memory is still 287.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 248.38 ms. Allocated memory is still 314.6 MB. Free memory was 287.3 MB in the beginning and 273.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 954.28 ms. Allocated memory is still 314.6 MB. Free memory was 271.0 MB in the beginning and 202.5 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 15 VarBasedMoverChecksPositive, 5 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 5 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 2 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.3s, 22 PlacesBefore, 9 PlacesAfterwards, 18 TransitionsBefore, 5 TransitionsAfterwards, 28 CoEnabledTransitionPairs, 4 FixpointIterations, 7 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 13 TotalNumberOfCompositions, 26 MoverChecksTotal - CounterExampleResult [Line: 19]: assertion can be violated assertion can be violated We found a FailurePath: [L16] 0 int x = 0; [L24] 0 pthread_t threadId; [L25] FCALL, FORK 0 pthread_create(&threadId, NULL, & foo, NULL) VAL [arg={0:0}, x=0] [L27] 0 x = x - 1 VAL [arg={0:0}, x=-1] [L19] 1 CodeAnnotStmt[Assertion] VAL [arg={0:0}, arg={0:0}, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 3 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 4 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...