/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/09a-return-after-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:16:28,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:16:28,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:16:28,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 08:16:28,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 08:16:28,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 08:16:28,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 08:16:28,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 08:16:28,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 08:16:28,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 08:16:28,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 08:16:28,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 08:16:28,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 08:16:28,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 08:16:28,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 08:16:28,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 08:16:28,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 08:16:28,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 08:16:28,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 08:16:28,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 08:16:28,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 08:16:28,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 08:16:28,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 08:16:28,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 08:16:28,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-13 08:16:28,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-13 08:16:28,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-13 08:16:28,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-13 08:16:28,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-13 08:16:28,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-13 08:16:28,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-13 08:16:28,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-13 08:16:28,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-13 08:16:28,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-13 08:16:28,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-13 08:16:28,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-13 08:16:28,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-13 08:16:28,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-13 08:16:28,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 08:16:28,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 08:16:28,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 08:16:28,543 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-NoLbe.epf [2021-06-13 08:16:28,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:16:28,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:16:28,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:16:28,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:16:28,582 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:16:28,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:16:28,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:16:28,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:16:28,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:16:28,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:16:28,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:16:28,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:16:28,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:16:28,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:16:28,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:16:28,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:16:28,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:16:28,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:16:28,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:16:28,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:16:28,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:16:28,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:16:28,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:16:28,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:16:28,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:16:28,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:16:28,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:16:28,587 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:16:28,587 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:16:28,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:16:28,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:16:28,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:16:28,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:16:28,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-13 08:16:28,919 INFO L275 PluginConnector]: CDTParser initialized [2021-06-13 08:16:28,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/09a-return-after-end.c [2021-06-13 08:16:28,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6ec42171/ed03f4cd59c64640b3dafaae75da487c/FLAGef4d3fc65 [2021-06-13 08:16:29,426 INFO L306 CDTParser]: Found 1 translation units. [2021-06-13 08:16:29,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/09a-return-after-end.c [2021-06-13 08:16:29,427 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-13 08:16:29,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6ec42171/ed03f4cd59c64640b3dafaae75da487c/FLAGef4d3fc65 [2021-06-13 08:16:29,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6ec42171/ed03f4cd59c64640b3dafaae75da487c [2021-06-13 08:16:29,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:16:29,976 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-13 08:16:29,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-13 08:16:29,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-13 08:16:29,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-13 08:16:29,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.06 08:16:29" (1/1) ... [2021-06-13 08:16:29,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cf2a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:29, skipping insertion in model container [2021-06-13 08:16:29,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.06 08:16:29" (1/1) ... [2021-06-13 08:16:29,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-13 08:16:30,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-13 08:16:30,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-13 08:16:30,149 INFO L203 MainTranslator]: Completed pre-run [2021-06-13 08:16:30,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-13 08:16:30,175 INFO L208 MainTranslator]: Completed translation [2021-06-13 08:16:30,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30 WrapperNode [2021-06-13 08:16:30,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-13 08:16:30,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:16:30,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:16:30,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:16:30,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:16:30,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:16:30,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:16:30,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:16:30,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (1/1) ... [2021-06-13 08:16:30,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:16:30,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:16:30,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:16:30,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:16:30,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (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 [2021-06-13 08:16:30,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-13 08:16:30,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-13 08:16:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-13 08:16:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-13 08:16:30,271 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-13 08:16:30,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:16:30,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:16:30,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-13 08:16:30,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-13 08:16:30,274 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 08:16:30,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:16:30,436 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-13 08:16:30,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:16:30 BoogieIcfgContainer [2021-06-13 08:16:30,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:16:30,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:16:30,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:16:30,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:16:30,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.06 08:16:29" (1/3) ... [2021-06-13 08:16:30,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41188f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:16:30, skipping insertion in model container [2021-06-13 08:16:30,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:30" (2/3) ... [2021-06-13 08:16:30,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41188f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:16:30, skipping insertion in model container [2021-06-13 08:16:30,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:16:30" (3/3) ... [2021-06-13 08:16:30,444 INFO L111 eAbstractionObserver]: Analyzing ICFG 09a-return-after-end.c [2021-06-13 08:16:30,448 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:16:30,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 08:16:30,449 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:16:30,466 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,466 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,466 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,466 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,467 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,467 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,467 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,467 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,468 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,468 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,468 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,468 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,468 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,468 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,469 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,469 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,471 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,471 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,471 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,471 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:30,473 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-13 08:16:30,491 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:16:30,516 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:16:30,516 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:16:30,516 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:16:30,516 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:16:30,516 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:16:30,516 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:16:30,516 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:16:30,517 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:16:30,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 61 flow [2021-06-13 08:16:30,570 INFO L129 PetriNetUnfolder]: 1/27 cut-off events. [2021-06-13 08:16:30,570 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:16:30,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 1/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2021-06-13 08:16:30,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 61 flow [2021-06-13 08:16:30,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 57 flow [2021-06-13 08:16:30,584 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-06-13 08:16:30,584 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:16:30,584 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:16:30,585 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:16:30,585 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:16:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:16:30,592 INFO L82 PathProgramCache]: Analyzing trace with hash -816529340, now seen corresponding path program 1 times [2021-06-13 08:16:30,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:16:30,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404698948] [2021-06-13 08:16:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:16:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:16:30,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:30,794 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:30,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:30,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:16:30,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:16:30,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404698948] [2021-06-13 08:16:30,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404698948] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:16:30,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:16:30,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-13 08:16:30,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459048079] [2021-06-13 08:16:30,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:16:30,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:16:30,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:16:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:16:30,857 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 28 [2021-06-13 08:16:30,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-06-13 08:16:30,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:16:30,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 28 [2021-06-13 08:16:30,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:16:30,916 INFO L129 PetriNetUnfolder]: 2/38 cut-off events. [2021-06-13 08:16:30,916 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:16:30,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 38 events. 2/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 1 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 34. Up to 5 conditions per place. [2021-06-13 08:16:30,917 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 1 selfloop transitions, 2 changer transitions 8/28 dead transitions. [2021-06-13 08:16:30,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 71 flow [2021-06-13 08:16:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:16:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:16:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2021-06-13 08:16:30,929 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-13 08:16:30,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2021-06-13 08:16:30,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2021-06-13 08:16:30,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:16:30,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2021-06-13 08:16:30,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-06-13 08:16:30,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-06-13 08:16:30,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-06-13 08:16:30,942 INFO L185 Difference]: Start difference. First operand has 30 places, 27 transitions, 57 flow. Second operand 3 states and 76 transitions. [2021-06-13 08:16:30,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 71 flow [2021-06-13 08:16:30,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:16:30,950 INFO L241 Difference]: Finished difference. Result has 32 places, 20 transitions, 50 flow [2021-06-13 08:16:30,952 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2021-06-13 08:16:30,952 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2021-06-13 08:16:30,953 INFO L482 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 50 flow [2021-06-13 08:16:30,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-06-13 08:16:30,953 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:16:30,953 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:16:30,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:16:30,954 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:16:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:16:30,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1505155654, now seen corresponding path program 1 times [2021-06-13 08:16:30,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:16:30,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839095532] [2021-06-13 08:16:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:16:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:16:31,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:31,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:31,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:31,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:31,029 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:31,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:16:31,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:16:31,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839095532] [2021-06-13 08:16:31,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839095532] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:16:31,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:16:31,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:16:31,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208296981] [2021-06-13 08:16:31,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 08:16:31,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:16:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 08:16:31,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 08:16:31,041 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 28 [2021-06-13 08:16:31,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-06-13 08:16:31,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:16:31,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 28 [2021-06-13 08:16:31,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:16:31,077 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-06-13 08:16:31,078 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-13 08:16:31,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 24 events. 0/24 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-13 08:16:31,078 INFO L132 encePairwiseOnDemand]: 23/28 looper letters, 1 selfloop transitions, 4 changer transitions 1/21 dead transitions. [2021-06-13 08:16:31,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 67 flow [2021-06-13 08:16:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-13 08:16:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-13 08:16:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2021-06-13 08:16:31,081 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8125 [2021-06-13 08:16:31,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 91 transitions. [2021-06-13 08:16:31,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 91 transitions. [2021-06-13 08:16:31,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:16:31,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 91 transitions. [2021-06-13 08:16:31,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-06-13 08:16:31,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2021-06-13 08:16:31,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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) [2021-06-13 08:16:31,089 INFO L185 Difference]: Start difference. First operand has 32 places, 20 transitions, 50 flow. Second operand 4 states and 91 transitions. [2021-06-13 08:16:31,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 67 flow [2021-06-13 08:16:31,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 61 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-13 08:16:31,092 INFO L241 Difference]: Finished difference. Result has 28 places, 20 transitions, 60 flow [2021-06-13 08:16:31,092 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2021-06-13 08:16:31,092 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -2 predicate places. [2021-06-13 08:16:31,092 INFO L482 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 60 flow [2021-06-13 08:16:31,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 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) [2021-06-13 08:16:31,093 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:16:31,093 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:16:31,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 08:16:31,093 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:16:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:16:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1496778214, now seen corresponding path program 2 times [2021-06-13 08:16:31,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:16:31,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179076749] [2021-06-13 08:16:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:16:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:16:31,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:31,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:31,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:31,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:31,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:31,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:16:31,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:16:31,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179076749] [2021-06-13 08:16:31,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179076749] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:16:31,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:16:31,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:16:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726682555] [2021-06-13 08:16:31,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:16:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:16:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:16:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:16:31,146 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 28 [2021-06-13 08:16:31,146 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-06-13 08:16:31,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:16:31,146 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 28 [2021-06-13 08:16:31,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:16:31,157 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 08:16:31,157 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-13 08:16:31,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-13 08:16:31,158 INFO L132 encePairwiseOnDemand]: 26/28 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-06-13 08:16:31,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 48 flow [2021-06-13 08:16:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:16:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:16:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-13 08:16:31,160 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-06-13 08:16:31,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-13 08:16:31,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-13 08:16:31,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:16:31,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-13 08:16:31,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-06-13 08:16:31,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-06-13 08:16:31,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-06-13 08:16:31,163 INFO L185 Difference]: Start difference. First operand has 28 places, 20 transitions, 60 flow. Second operand 3 states and 75 transitions. [2021-06-13 08:16:31,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 48 flow [2021-06-13 08:16:31,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 38 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-06-13 08:16:31,164 INFO L241 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2021-06-13 08:16:31,164 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2021-06-13 08:16:31,165 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -9 predicate places. [2021-06-13 08:16:31,165 INFO L482 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2021-06-13 08:16:31,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-06-13 08:16:31,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 08:16:31,167 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:16:31,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:16:31 BasicIcfg [2021-06-13 08:16:31,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:16:31,172 INFO L168 Benchmark]: Toolchain (without parser) took 1195.01 ms. Allocated memory is still 255.9 MB. Free memory was 218.3 MB in the beginning and 180.7 MB in the end (delta: 37.6 MB). Peak memory consumption was 36.1 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:31,172 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 236.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:16:31,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.07 ms. Allocated memory is still 255.9 MB. Free memory was 218.1 MB in the beginning and 237.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:31,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 235.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:31,175 INFO L168 Benchmark]: Boogie Preprocessor took 13.27 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:31,179 INFO L168 Benchmark]: RCFGBuilder took 222.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 221.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:31,179 INFO L168 Benchmark]: TraceAbstraction took 731.59 ms. Allocated memory is still 255.9 MB. Free memory was 220.6 MB in the beginning and 180.7 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:31,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 236.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 194.07 ms. Allocated memory is still 255.9 MB. Free memory was 218.1 MB in the beginning and 237.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 235.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.27 ms. Allocated memory is still 255.9 MB. Free memory was 235.8 MB in the beginning and 234.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 222.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 221.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 731.59 ms. Allocated memory is still 255.9 MB. Free memory was 220.6 MB in the beginning and 180.7 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 35 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 660.9ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 177.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 2 SDslu, 2 SDs, 0 SdLazy, 10 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=2, 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: 19.0ms SsaConstructionTime, 64.2ms SatisfiabilityAnalysisTime, 182.1ms InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 101 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...