/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/09b-return-after-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 13:15:08,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 13:15:08,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 13:15:08,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 13:15:08,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 13:15:08,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 13:15:08,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 13:15:08,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 13:15:08,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 13:15:08,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 13:15:08,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 13:15:08,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 13:15:08,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 13:15:08,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 13:15:08,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 13:15:08,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 13:15:08,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 13:15:08,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 13:15:08,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 13:15:08,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 13:15:08,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 13:15:08,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 13:15:08,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 13:15:08,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 13:15:08,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 13:15:08,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-24 13:15:08,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-24 13:15:08,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-24 13:15:08,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-24 13:15:08,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-24 13:15:08,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-24 13:15:08,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-24 13:15:08,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-24 13:15:08,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 13:15:08,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 13:15:08,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 13:15:08,557 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-VariableLbe.epf [2021-03-24 13:15:08,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 13:15:08,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 13:15:08,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 13:15:08,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 13:15:08,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 13:15:08,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 13:15:08,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 13:15:08,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 13:15:08,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 13:15:08,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 13:15:08,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 13:15:08,596 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 13:15:08,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 13:15:08,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 13:15:08,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 13:15:08,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 13:15:08,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 13:15:08,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 13:15:08,921 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 13:15:08,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/09b-return-after-end.c [2021-03-24 13:15:08,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb018efb/c041bae7239c47608586eeef63583003/FLAG7cc25153b [2021-03-24 13:15:09,320 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 13:15:09,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/09b-return-after-end.c [2021-03-24 13:15:09,321 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-24 13:15:09,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb018efb/c041bae7239c47608586eeef63583003/FLAG7cc25153b [2021-03-24 13:15:09,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb018efb/c041bae7239c47608586eeef63583003 [2021-03-24 13:15:09,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 13:15:09,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 13:15:09,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 13:15:09,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 13:15:09,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 13:15:09,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78350961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09, skipping insertion in model container [2021-03-24 13:15:09,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 13:15:09,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 13:15:09,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 13:15:09,563 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 13:15:09,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 13:15:09,585 INFO L208 MainTranslator]: Completed translation [2021-03-24 13:15:09,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09 WrapperNode [2021-03-24 13:15:09,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 13:15:09,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 13:15:09,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 13:15:09,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 13:15:09,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 13:15:09,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 13:15:09,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 13:15:09,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 13:15:09,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (1/1) ... [2021-03-24 13:15:09,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 13:15:09,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 13:15:09,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 13:15:09,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 13:15:09,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (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 [2021-03-24 13:15:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 13:15:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 13:15:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 13:15:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-24 13:15:09,690 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-24 13:15:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 13:15:09,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 13:15:09,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 13:15:09,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 13:15:09,693 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 13:15:09,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 13:15:09,929 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-24 13:15:09,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:15:09 BoogieIcfgContainer [2021-03-24 13:15:09,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 13:15:09,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 13:15:09,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 13:15:09,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 13:15:09,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 01:15:09" (1/3) ... [2021-03-24 13:15:09,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bced07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:15:09, skipping insertion in model container [2021-03-24 13:15:09,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 01:15:09" (2/3) ... [2021-03-24 13:15:09,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bced07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 01:15:09, skipping insertion in model container [2021-03-24 13:15:09,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 01:15:09" (3/3) ... [2021-03-24 13:15:09,936 INFO L111 eAbstractionObserver]: Analyzing ICFG 09b-return-after-end.c [2021-03-24 13:15:09,947 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 13:15:09,950 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 13:15:09,951 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 13:15:09,988 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,988 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,988 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,988 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,988 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,989 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,989 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,989 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,989 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,990 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,992 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,993 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,993 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,993 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 13:15:09,996 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 13:15:10,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 13:15:10,046 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 13:15:10,046 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 13:15:10,046 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 13:15:10,046 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 13:15:10,046 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 13:15:10,046 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 13:15:10,046 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 13:15:10,046 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 13:15:10,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 57 flow [2021-03-24 13:15:10,087 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-03-24 13:15:10,087 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:10,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 1/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2021-03-24 13:15:10,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 57 flow [2021-03-24 13:15:10,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 53 flow [2021-03-24 13:15:10,106 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 13:15:10,113 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 25 transitions, 53 flow [2021-03-24 13:15:10,116 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 25 transitions, 53 flow [2021-03-24 13:15:10,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 53 flow [2021-03-24 13:15:10,130 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-03-24 13:15:10,130 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:10,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 1/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2021-03-24 13:15:10,132 INFO L142 LiptonReduction]: Number of co-enabled transitions 112 [2021-03-24 13:15:10,580 INFO L154 LiptonReduction]: Checked pairs total: 108 [2021-03-24 13:15:10,580 INFO L156 LiptonReduction]: Total number of compositions: 15 [2021-03-24 13:15:10,582 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 477 [2021-03-24 13:15:10,589 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-24 13:15:10,590 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:10,590 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:15:10,591 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 13:15:10,591 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:15:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:15:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1388076543, now seen corresponding path program 1 times [2021-03-24 13:15:10,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:15:10,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476939405] [2021-03-24 13:15:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:15:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:15:10,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:10,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:15:10,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:10,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:15:10,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476939405] [2021-03-24 13:15:10,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:15:10,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 13:15:10,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508783127] [2021-03-24 13:15:10,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 13:15:10,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:15:10,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 13:15:10,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 13:15:10,736 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 41 [2021-03-24 13:15:10,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 12 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-03-24 13:15:10,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:15:10,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 41 [2021-03-24 13:15:10,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:15:10,754 INFO L129 PetriNetUnfolder]: 2/16 cut-off events. [2021-03-24 13:15:10,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 13:15:10,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 16 events. 2/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 23 event pairs, 1 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 20. Up to 5 conditions per place. [2021-03-24 13:15:10,755 INFO L132 encePairwiseOnDemand]: 38/41 looper letters, 1 selfloop transitions, 2 changer transitions 5/13 dead transitions. [2021-03-24 13:15:10,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 13 transitions, 41 flow [2021-03-24 13:15:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 13:15:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 13:15:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2021-03-24 13:15:10,766 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7642276422764228 [2021-03-24 13:15:10,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2021-03-24 13:15:10,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2021-03-24 13:15:10,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:15:10,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2021-03-24 13:15:10,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-03-24 13:15:10,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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) [2021-03-24 13:15:10,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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) [2021-03-24 13:15:10,778 INFO L185 Difference]: Start difference. First operand has 15 places, 12 transitions, 27 flow. Second operand 3 states and 94 transitions. [2021-03-24 13:15:10,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 13 transitions, 41 flow [2021-03-24 13:15:10,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 13 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 13:15:10,782 INFO L241 Difference]: Finished difference. Result has 17 places, 8 transitions, 26 flow [2021-03-24 13:15:10,783 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2021-03-24 13:15:10,784 INFO L343 CegarLoopForPetriNet]: 15 programPoint places, 2 predicate places. [2021-03-24 13:15:10,784 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 8 transitions, 26 flow [2021-03-24 13:15:10,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-03-24 13:15:10,785 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:15:10,785 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:15:10,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 13:15:10,785 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:15:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:15:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1793363782, now seen corresponding path program 1 times [2021-03-24 13:15:10,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:15:10,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009605985] [2021-03-24 13:15:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:15:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 13:15:10,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:10,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 13:15:10,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:10,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:10,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 13:15:10,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 13:15:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 13:15:10,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009605985] [2021-03-24 13:15:10,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 13:15:10,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 13:15:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973878895] [2021-03-24 13:15:10,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 13:15:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 13:15:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 13:15:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 13:15:10,822 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 41 [2021-03-24 13:15:10,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 8 transitions, 26 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-03-24 13:15:10,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 13:15:10,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 41 [2021-03-24 13:15:10,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 13:15:10,842 INFO L129 PetriNetUnfolder]: 1/12 cut-off events. [2021-03-24 13:15:10,842 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 13:15:10,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 12 events. 1/12 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 21. Up to 4 conditions per place. [2021-03-24 13:15:10,843 INFO L132 encePairwiseOnDemand]: 37/41 looper letters, 3 selfloop transitions, 3 changer transitions 1/10 dead transitions. [2021-03-24 13:15:10,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 47 flow [2021-03-24 13:15:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 13:15:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 13:15:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2021-03-24 13:15:10,845 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2021-03-24 13:15:10,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2021-03-24 13:15:10,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2021-03-24 13:15:10,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 13:15:10,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2021-03-24 13:15:10,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-03-24 13:15:10,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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) [2021-03-24 13:15:10,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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) [2021-03-24 13:15:10,847 INFO L185 Difference]: Start difference. First operand has 17 places, 8 transitions, 26 flow. Second operand 4 states and 104 transitions. [2021-03-24 13:15:10,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 47 flow [2021-03-24 13:15:10,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 13:15:10,848 INFO L241 Difference]: Finished difference. Result has 16 places, 8 transitions, 32 flow [2021-03-24 13:15:10,849 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=32, PETRI_PLACES=16, PETRI_TRANSITIONS=8} [2021-03-24 13:15:10,849 INFO L343 CegarLoopForPetriNet]: 15 programPoint places, 1 predicate places. [2021-03-24 13:15:10,849 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 8 transitions, 32 flow [2021-03-24 13:15:10,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-03-24 13:15:10,850 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 13:15:10,850 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 13:15:10,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 13:15:10,850 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 13:15:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 13:15:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1793357272, now seen corresponding path program 2 times [2021-03-24 13:15:10,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 13:15:10,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973979547] [2021-03-24 13:15:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 13:15:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:15:10,862 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:15:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 13:15:10,869 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 13:15:10,883 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 13:15:10,883 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 13:15:10,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 13:15:10,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 01:15:10 BasicIcfg [2021-03-24 13:15:10,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 13:15:10,902 INFO L168 Benchmark]: Toolchain (without parser) took 1541.30 ms. Allocated memory is still 404.8 MB. Free memory was 368.3 MB in the beginning and 277.9 MB in the end (delta: 90.4 MB). Peak memory consumption was 90.9 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:10,902 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 404.8 MB. Free memory is still 386.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:10,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.97 ms. Allocated memory is still 404.8 MB. Free memory was 368.2 MB in the beginning and 388.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:10,903 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 404.8 MB. Free memory was 388.0 MB in the beginning and 385.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:10,903 INFO L168 Benchmark]: Boogie Preprocessor took 18.58 ms. Allocated memory is still 404.8 MB. Free memory is still 385.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 13:15:10,904 INFO L168 Benchmark]: RCFGBuilder took 295.94 ms. Allocated memory is still 404.8 MB. Free memory was 384.9 MB in the beginning and 372.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:10,904 INFO L168 Benchmark]: TraceAbstraction took 968.90 ms. Allocated memory is still 404.8 MB. Free memory was 372.3 MB in the beginning and 277.9 MB in the end (delta: 94.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 16.0 GB. [2021-03-24 13:15:10,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 404.8 MB. Free memory is still 386.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 226.97 ms. Allocated memory is still 404.8 MB. Free memory was 368.2 MB in the beginning and 388.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 404.8 MB. Free memory was 388.0 MB in the beginning and 385.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.58 ms. Allocated memory is still 404.8 MB. Free memory is still 385.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 295.94 ms. Allocated memory is still 404.8 MB. Free memory was 384.9 MB in the beginning and 372.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 968.90 ms. Allocated memory is still 404.8 MB. Free memory was 372.3 MB in the beginning and 277.9 MB in the end (delta: 94.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 464.9ms, 28 PlacesBefore, 15 PlacesAfterwards, 25 TransitionsBefore, 12 TransitionsAfterwards, 112 CoEnabledTransitionPairs, 3 FixpointIterations, 6 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 15 TotalNumberOfCompositions, 108 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 76, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 55, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 55, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 76, positive: 19, positive conditional: 0, positive unconditional: 19, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 55, unknown conditional: 0, unknown unconditional: 55] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - CounterExampleResult [Line: 36]: assertion can be violated assertion can be violated We found a FailurePath: [L15] 0 int x = 1; [L16] 0 int y = 1; VAL [x=1, y=1] [L31] 0 pthread_t threadId; [L32] FCALL, FORK 0 pthread_create(&threadId, NULL, &foo, NULL) VAL [arg={0:0}, x=1, y=1] [L20] COND TRUE 1 \read(y) VAL [arg={0:0}, arg={0:0}, x=1, y=1] [L34] 0 y = 0 VAL [arg={0:0}, arg={0:0}, x=1, y=0] [L22] 1 x = y [L23] 1 return (void*) NULL; [L36] 0 CodeAnnotStmt[Assertion] VAL [\result={0:0}, arg={0:0}, arg={0:0}, x=0, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 842.0ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 81.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 539.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 11 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.3ms SsaConstructionTime, 28.7ms SatisfiabilityAnalysisTime, 61.2ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...