/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/09b-return-after-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:28:27,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:28:27,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:28:27,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:28:27,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:28:27,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:28:27,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:28:27,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:28:27,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:28:27,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:28:27,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:28:27,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:28:27,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:28:27,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:28:27,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:28:27,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:28:27,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:28:27,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:28:27,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:28:27,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:28:27,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:28:27,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:28:27,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:28:27,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:28:27,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 22:28:27,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 22:28:27,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 22:28:27,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 22:28:27,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 22:28:27,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 22:28:27,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 22:28:27,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 22:28:27,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 22:28:27,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 22:28:27,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 22:28:27,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 22:28:27,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 22:28:27,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 22:28:27,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:28:27,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:28:27,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:28:27,196 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 [2021-03-11 22:28:27,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:28:27,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:28:27,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:28:27,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:28:27,211 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:28:27,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:28:27,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:28:27,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:28:27,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:28:27,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:28:27,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:28:27,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:28:27,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:28:27,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:28:27,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:28:27,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:28:27,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:28:27,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:28:27,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:28:27,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:28:27,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:28:27,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:28:27,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:28:27,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:28:27,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:28:27,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:28:27,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 22:28:27,438 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 22:28:27,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/09b-return-after-end.c [2021-03-11 22:28:27,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fa2476f/93d2f27c1f1f4259bdd263f3f2ec9019/FLAG400df9239 [2021-03-11 22:28:27,826 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 22:28:27,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/09b-return-after-end.c [2021-03-11 22:28:27,827 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-11 22:28:27,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fa2476f/93d2f27c1f1f4259bdd263f3f2ec9019/FLAG400df9239 [2021-03-11 22:28:28,228 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fa2476f/93d2f27c1f1f4259bdd263f3f2ec9019 [2021-03-11 22:28:28,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:28:28,235 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 22:28:28,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 22:28:28,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 22:28:28,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 22:28:28,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233c4d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28, skipping insertion in model container [2021-03-11 22:28:28,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 22:28:28,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 22:28:28,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 22:28:28,342 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 22:28:28,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 22:28:28,360 INFO L208 MainTranslator]: Completed translation [2021-03-11 22:28:28,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28 WrapperNode [2021-03-11 22:28:28,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 22:28:28,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:28:28,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:28:28,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:28:28,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:28:28,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:28:28,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:28:28,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:28:28,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (1/1) ... [2021-03-11 22:28:28,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:28:28,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:28:28,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:28:28,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:28:28,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (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 [2021-03-11 22:28:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 22:28:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 22:28:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 22:28:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-11 22:28:28,457 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-11 22:28:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:28:28,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:28:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 22:28:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 22:28:28,460 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:28:28,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:28:28,653 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-11 22:28:28,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:28:28 BoogieIcfgContainer [2021-03-11 22:28:28,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:28:28,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:28:28,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:28:28,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:28:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 10:28:28" (1/3) ... [2021-03-11 22:28:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266f0348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:28:28, skipping insertion in model container [2021-03-11 22:28:28,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 10:28:28" (2/3) ... [2021-03-11 22:28:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266f0348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:28:28, skipping insertion in model container [2021-03-11 22:28:28,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:28:28" (3/3) ... [2021-03-11 22:28:28,659 INFO L111 eAbstractionObserver]: Analyzing ICFG 09b-return-after-end.c [2021-03-11 22:28:28,662 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:28:28,664 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:28:28,665 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:28:28,677 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,677 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,678 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,679 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,680 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,681 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,681 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,681 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:28:28,683 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:28:28,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-11 22:28:28,707 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:28:28,707 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:28:28,707 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:28:28,707 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:28:28,707 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:28:28,707 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:28:28,707 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:28:28,708 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:28:28,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 57 flow [2021-03-11 22:28:28,727 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-03-11 22:28:28,727 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:28:28,728 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. [2021-03-11 22:28:28,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 57 flow [2021-03-11 22:28:28,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 53 flow [2021-03-11 22:28:28,733 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:28:28,739 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 25 transitions, 53 flow [2021-03-11 22:28:28,741 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 25 transitions, 53 flow [2021-03-11 22:28:28,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 53 flow [2021-03-11 22:28:28,746 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-03-11 22:28:28,746 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:28:28,747 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. [2021-03-11 22:28:28,747 INFO L116 LiptonReduction]: Number of co-enabled transitions 112 [2021-03-11 22:28:29,258 INFO L131 LiptonReduction]: Checked pairs total: 161 [2021-03-11 22:28:29,258 INFO L133 LiptonReduction]: Total number of compositions: 19 [2021-03-11 22:28:29,259 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 528 [2021-03-11 22:28:29,264 INFO L129 PetriNetUnfolder]: 1/6 cut-off events. [2021-03-11 22:28:29,264 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:28:29,265 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:28:29,265 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-11 22:28:29,265 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:28:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:28:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash 3459769, now seen corresponding path program 1 times [2021-03-11 22:28:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:28:29,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791812173] [2021-03-11 22:28:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:28:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:28:29,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:28:29,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:28:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:28:29,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791812173] [2021-03-11 22:28:29,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:28:29,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 22:28:29,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215092652] [2021-03-11 22:28:29,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:28:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:28:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:28:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:28:29,361 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 45 [2021-03-11 22:28:29,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-03-11 22:28:29,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:28:29,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 45 [2021-03-11 22:28:29,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:28:29,373 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2021-03-11 22:28:29,373 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:28:29,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs, 1 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 18. Up to 5 conditions per place. [2021-03-11 22:28:29,374 INFO L132 encePairwiseOnDemand]: 42/45 looper letters, 1 selfloop transitions, 2 changer transitions 3/9 dead transitions. [2021-03-11 22:28:29,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 9 transitions, 33 flow [2021-03-11 22:28:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:28:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:28:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2021-03-11 22:28:29,381 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-03-11 22:28:29,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 100 transitions. [2021-03-11 22:28:29,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 100 transitions. [2021-03-11 22:28:29,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:28:29,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 100 transitions. [2021-03-11 22:28:29,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-03-11 22:28:29,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-03-11 22:28:29,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-03-11 22:28:29,388 INFO L185 Difference]: Start difference. First operand has 11 places, 8 transitions, 19 flow. Second operand 3 states and 100 transitions. [2021-03-11 22:28:29,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 9 transitions, 33 flow [2021-03-11 22:28:29,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 9 transitions, 32 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 22:28:29,390 INFO L241 Difference]: Finished difference. Result has 13 places, 6 transitions, 22 flow [2021-03-11 22:28:29,391 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=22, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2021-03-11 22:28:29,392 INFO L335 CegarLoopForPetriNet]: 11 programPoint places, 2 predicate places. [2021-03-11 22:28:29,392 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 22 flow [2021-03-11 22:28:29,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-03-11 22:28:29,392 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:28:29,392 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:28:29,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:28:29,393 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:28:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:28:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash -970100939, now seen corresponding path program 1 times [2021-03-11 22:28:29,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:28:29,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158554733] [2021-03-11 22:28:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:28:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:28:29,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:28:29,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:28:29,405 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:28:29,406 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:28:29,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:28:29,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:28:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:28:29,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158554733] [2021-03-11 22:28:29,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:28:29,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:28:29,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842543997] [2021-03-11 22:28:29,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:28:29,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:28:29,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:28:29,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:28:29,410 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 45 [2021-03-11 22:28:29,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 6 transitions, 22 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-03-11 22:28:29,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:28:29,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 45 [2021-03-11 22:28:29,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:28:29,416 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2021-03-11 22:28:29,416 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-11 22:28:29,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 9 events. 1/9 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/10 useless extension candidates. Maximal degree in co-relation 18. Up to 4 conditions per place. [2021-03-11 22:28:29,417 INFO L132 encePairwiseOnDemand]: 43/45 looper letters, 4 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2021-03-11 22:28:29,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 7 transitions, 37 flow [2021-03-11 22:28:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:28:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:28:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2021-03-11 22:28:29,418 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-03-11 22:28:29,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2021-03-11 22:28:29,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2021-03-11 22:28:29,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:28:29,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2021-03-11 22:28:29,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-03-11 22:28:29,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-03-11 22:28:29,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-03-11 22:28:29,419 INFO L185 Difference]: Start difference. First operand has 13 places, 6 transitions, 22 flow. Second operand 3 states and 99 transitions. [2021-03-11 22:28:29,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 7 transitions, 37 flow [2021-03-11 22:28:29,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 22:28:29,420 INFO L241 Difference]: Finished difference. Result has 13 places, 6 transitions, 23 flow [2021-03-11 22:28:29,420 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=23, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2021-03-11 22:28:29,420 INFO L335 CegarLoopForPetriNet]: 11 programPoint places, 2 predicate places. [2021-03-11 22:28:29,420 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 23 flow [2021-03-11 22:28:29,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-03-11 22:28:29,421 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:28:29,421 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:28:29,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:28:29,421 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:28:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:28:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash -969918659, now seen corresponding path program 2 times [2021-03-11 22:28:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:28:29,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814445910] [2021-03-11 22:28:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:28:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:28:29,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:28:29,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:28:29,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:28:29,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:28:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:28:29,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814445910] [2021-03-11 22:28:29,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:28:29,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 22:28:29,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588594751] [2021-03-11 22:28:29,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:28:29,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:28:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:28:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:28:29,441 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 45 [2021-03-11 22:28:29,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 6 transitions, 23 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2021-03-11 22:28:29,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:28:29,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 45 [2021-03-11 22:28:29,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:28:29,454 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 22:28:29,454 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-11 22:28:29,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 9 events. 0/9 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 1/10 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 22:28:29,454 INFO L132 encePairwiseOnDemand]: 41/45 looper letters, 2 selfloop transitions, 3 changer transitions 1/7 dead transitions. [2021-03-11 22:28:29,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 38 flow [2021-03-11 22:28:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 22:28:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 22:28:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2021-03-11 22:28:29,455 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2021-03-11 22:28:29,455 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2021-03-11 22:28:29,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2021-03-11 22:28:29,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:28:29,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2021-03-11 22:28:29,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2021-03-11 22:28:29,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2021-03-11 22:28:29,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2021-03-11 22:28:29,457 INFO L185 Difference]: Start difference. First operand has 13 places, 6 transitions, 23 flow. Second operand 4 states and 111 transitions. [2021-03-11 22:28:29,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 38 flow [2021-03-11 22:28:29,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 37 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 22:28:29,458 INFO L241 Difference]: Finished difference. Result has 16 places, 6 transitions, 32 flow [2021-03-11 22:28:29,458 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=32, PETRI_PLACES=16, PETRI_TRANSITIONS=6} [2021-03-11 22:28:29,458 INFO L335 CegarLoopForPetriNet]: 11 programPoint places, 5 predicate places. [2021-03-11 22:28:29,458 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 6 transitions, 32 flow [2021-03-11 22:28:29,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2021-03-11 22:28:29,458 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:28:29,458 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 22:28:29,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 22:28:29,458 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:28:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:28:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash -969927959, now seen corresponding path program 3 times [2021-03-11 22:28:29,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:28:29,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842757388] [2021-03-11 22:28:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:28:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:28:29,466 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:28:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:28:29,470 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:28:29,479 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:28:29,479 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:28:29,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 22:28:29,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:28:29 BasicIcfg [2021-03-11 22:28:29,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:28:29,492 INFO L168 Benchmark]: Toolchain (without parser) took 1259.09 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 235.0 MB in the beginning and 260.8 MB in the end (delta: -25.8 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.0 GB. [2021-03-11 22:28:29,492 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:28:29,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.32 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 234.4 MB in the beginning and 324.8 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-11 22:28:29,493 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.04 ms. Allocated memory is still 339.7 MB. Free memory was 324.8 MB in the beginning and 323.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:28:29,493 INFO L168 Benchmark]: Boogie Preprocessor took 9.08 ms. Allocated memory is still 339.7 MB. Free memory was 323.2 MB in the beginning and 322.2 MB in the end (delta: 936.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:28:29,493 INFO L168 Benchmark]: RCFGBuilder took 252.12 ms. Allocated memory is still 339.7 MB. Free memory was 322.1 MB in the beginning and 310.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-11 22:28:29,494 INFO L168 Benchmark]: TraceAbstraction took 835.43 ms. Allocated memory is still 339.7 MB. Free memory was 309.6 MB in the beginning and 260.8 MB in the end (delta: 48.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.0 GB. [2021-03-11 22:28:29,495 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 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 123.32 ms. Allocated memory was 255.9 MB in the beginning and 339.7 MB in the end (delta: 83.9 MB). Free memory was 234.4 MB in the beginning and 324.8 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 31.04 ms. Allocated memory is still 339.7 MB. Free memory was 324.8 MB in the beginning and 323.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.08 ms. Allocated memory is still 339.7 MB. Free memory was 323.2 MB in the beginning and 322.2 MB in the end (delta: 936.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 252.12 ms. Allocated memory is still 339.7 MB. Free memory was 322.1 MB in the beginning and 310.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 835.43 ms. Allocated memory is still 339.7 MB. Free memory was 309.6 MB in the beginning and 260.8 MB in the end (delta: 48.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 517.4ms, 28 PlacesBefore, 11 PlacesAfterwards, 25 TransitionsBefore, 8 TransitionsAfterwards, 112 CoEnabledTransitionPairs, 4 FixpointIterations, 8 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 19 TotalNumberOfCompositions, 161 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 123, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 80, positive: 70, positive conditional: 0, positive unconditional: 70, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 80, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 46, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 123, positive: 29, positive conditional: 0, positive unconditional: 29, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 80, unknown conditional: 0, unknown unconditional: 80] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - 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; [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: 1.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 775.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 62.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 555.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 14 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, InterpolantAutomatonStates: 10, 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: 4.3ms SsaConstructionTime, 21.6ms SatisfiabilityAnalysisTime, 46.6ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 31 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...