/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/07-return-before-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:16:23,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:16:23,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:16:23,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 08:16:23,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 08:16:23,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 08:16:23,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 08:16:23,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 08:16:23,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 08:16:23,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 08:16:23,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 08:16:23,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 08:16:23,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 08:16:23,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 08:16:23,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 08:16:23,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 08:16:23,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 08:16:23,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 08:16:23,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 08:16:23,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 08:16:23,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 08:16:23,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 08:16:23,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 08:16:23,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 08:16:23,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-13 08:16:23,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-13 08:16:23,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-13 08:16:23,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-13 08:16:23,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-13 08:16:23,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-13 08:16:23,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-13 08:16:23,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-13 08:16:23,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-13 08:16:23,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 08:16:24,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 08:16:24,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 08:16:24,018 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 08:16:24,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:16:24,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:16:24,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:16:24,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:16:24,057 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:16:24,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:16:24,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:16:24,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:16:24,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:16:24,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:16:24,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:16:24,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:16:24,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:16:24,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:16:24,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:16:24,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:16:24,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:16:24,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:16:24,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:16:24,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:16:24,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:16:24,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:16:24,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:16:24,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:16:24,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:16:24,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:16:24,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:16:24,063 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:16:24,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:16:24,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:16:24,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:16:24,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:16:24,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:16:24,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-13 08:16:24,382 INFO L275 PluginConnector]: CDTParser initialized [2021-06-13 08:16:24,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c [2021-06-13 08:16:24,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbd6b6f5/eed86823db254f3b9f82bd608dea2615/FLAG9a1c28378 [2021-06-13 08:16:24,864 INFO L306 CDTParser]: Found 1 translation units. [2021-06-13 08:16:24,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c [2021-06-13 08:16:24,865 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-06-13 08:16:24,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbd6b6f5/eed86823db254f3b9f82bd608dea2615/FLAG9a1c28378 [2021-06-13 08:16:25,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbd6b6f5/eed86823db254f3b9f82bd608dea2615 [2021-06-13 08:16:25,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:16:25,297 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-13 08:16:25,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-13 08:16:25,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-13 08:16:25,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-13 08:16:25,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22038ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25, skipping insertion in model container [2021-06-13 08:16:25,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-13 08:16:25,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-13 08:16:25,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-13 08:16:25,444 INFO L203 MainTranslator]: Completed pre-run [2021-06-13 08:16:25,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-13 08:16:25,497 INFO L208 MainTranslator]: Completed translation [2021-06-13 08:16:25,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25 WrapperNode [2021-06-13 08:16:25,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-13 08:16:25,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:16:25,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:16:25,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:16:25,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:16:25,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:16:25,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:16:25,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:16:25,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (1/1) ... [2021-06-13 08:16:25,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:16:25,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:16:25,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:16:25,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:16:25,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (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 08:16:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-13 08:16:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-13 08:16:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-13 08:16:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-13 08:16:25,606 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-13 08:16:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:16:25,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:16:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-13 08:16:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-13 08:16:25,607 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 08:16:25,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:16:25,776 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-13 08:16:25,776 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: fooEXIT is neither atomic block end nor error location. [2021-06-13 08:16:25,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:16:25 BoogieIcfgContainer [2021-06-13 08:16:25,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:16:25,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:16:25,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:16:25,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:16:25,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.06 08:16:25" (1/3) ... [2021-06-13 08:16:25,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ade908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:16:25, skipping insertion in model container [2021-06-13 08:16:25,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.06 08:16:25" (2/3) ... [2021-06-13 08:16:25,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ade908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:16:25, skipping insertion in model container [2021-06-13 08:16:25,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:16:25" (3/3) ... [2021-06-13 08:16:25,799 INFO L111 eAbstractionObserver]: Analyzing ICFG 07-return-before-end.c [2021-06-13 08:16:25,803 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:16:25,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 08:16:25,804 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:16:25,839 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,840 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,841 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,841 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,841 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,841 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,841 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,842 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,842 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,842 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,843 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,844 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,844 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,844 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-13 08:16:25,854 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-13 08:16:25,901 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:16:25,925 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:16:25,925 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:16:25,925 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:16:25,925 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:16:25,925 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:16:25,925 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:16:25,926 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:16:25,926 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:16:25,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 57 flow [2021-06-13 08:16:25,951 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-06-13 08:16:25,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:16:25,953 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 3. Compared 9 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2021-06-13 08:16:25,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 57 flow [2021-06-13 08:16:25,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 53 flow [2021-06-13 08:16:25,963 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-06-13 08:16:25,963 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:16:25,963 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:16:25,964 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:16:25,964 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:16:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:16:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1509984702, now seen corresponding path program 1 times [2021-06-13 08:16:25,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:16:25,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627563742] [2021-06-13 08:16:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:16:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:16:26,115 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,116 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:26,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:26,127 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 08:16:26,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:16:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627563742] [2021-06-13 08:16:26,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627563742] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:16:26,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:16:26,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-13 08:16:26,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376669396] [2021-06-13 08:16:26,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:16:26,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:16:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:16:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:16:26,149 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 26 [2021-06-13 08:16:26,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 08:16:26,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:16:26,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 26 [2021-06-13 08:16:26,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:16:26,175 INFO L129 PetriNetUnfolder]: 2/34 cut-off events. [2021-06-13 08:16:26,176 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:16:26,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 34 events. 2/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 39 event pairs, 1 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 30. Up to 5 conditions per place. [2021-06-13 08:16:26,177 INFO L132 encePairwiseOnDemand]: 23/26 looper letters, 1 selfloop transitions, 2 changer transitions 8/26 dead transitions. [2021-06-13 08:16:26,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 67 flow [2021-06-13 08:16:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:16:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:16:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2021-06-13 08:16:26,192 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8974358974358975 [2021-06-13 08:16:26,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2021-06-13 08:16:26,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2021-06-13 08:16:26,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:16:26,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2021-06-13 08:16:26,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 08:16:26,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:16:26,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:16:26,205 INFO L185 Difference]: Start difference. First operand has 28 places, 25 transitions, 53 flow. Second operand 3 states and 70 transitions. [2021-06-13 08:16:26,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 67 flow [2021-06-13 08:16:26,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:16:26,212 INFO L241 Difference]: Finished difference. Result has 30 places, 18 transitions, 46 flow [2021-06-13 08:16:26,213 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2021-06-13 08:16:26,214 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2021-06-13 08:16:26,215 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 46 flow [2021-06-13 08:16:26,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 08:16:26,215 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:16:26,215 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 08:16:26,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:16:26,215 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:16:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:16:26,217 INFO L82 PathProgramCache]: Analyzing trace with hash 78219552, now seen corresponding path program 1 times [2021-06-13 08:16:26,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:16:26,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485643658] [2021-06-13 08:16:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:16:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:16:26,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:26,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:26,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:26,274 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 08:16:26,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:16:26,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485643658] [2021-06-13 08:16:26,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485643658] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:16:26,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:16:26,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:16:26,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135007672] [2021-06-13 08:16:26,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-13 08:16:26,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:16:26,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-13 08:16:26,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-13 08:16:26,278 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 26 [2021-06-13 08:16:26,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 08:16:26,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:16:26,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 26 [2021-06-13 08:16:26,278 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:16:26,303 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-06-13 08:16:26,303 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-13 08:16:26,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 20 events. 0/20 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-06-13 08:16:26,303 INFO L132 encePairwiseOnDemand]: 21/26 looper letters, 1 selfloop transitions, 4 changer transitions 1/19 dead transitions. [2021-06-13 08:16:26,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 63 flow [2021-06-13 08:16:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-13 08:16:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-13 08:16:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2021-06-13 08:16:26,305 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7980769230769231 [2021-06-13 08:16:26,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2021-06-13 08:16:26,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2021-06-13 08:16:26,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:16:26,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2021-06-13 08:16:26,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 08:16:26,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 08:16:26,308 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 08:16:26,308 INFO L185 Difference]: Start difference. First operand has 30 places, 18 transitions, 46 flow. Second operand 4 states and 83 transitions. [2021-06-13 08:16:26,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 63 flow [2021-06-13 08:16:26,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 57 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-13 08:16:26,310 INFO L241 Difference]: Finished difference. Result has 26 places, 18 transitions, 56 flow [2021-06-13 08:16:26,310 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2021-06-13 08:16:26,310 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, -2 predicate places. [2021-06-13 08:16:26,311 INFO L482 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 56 flow [2021-06-13 08:16:26,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 08:16:26,311 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:16:26,311 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 08:16:26,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 08:16:26,311 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:16:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:16:26,312 INFO L82 PathProgramCache]: Analyzing trace with hash 55122072, now seen corresponding path program 2 times [2021-06-13 08:16:26,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:16:26,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217842712] [2021-06-13 08:16:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:16:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:16:26,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:26,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-13 08:16:26,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:16:26,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:16:26,334 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 08:16:26,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:16:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217842712] [2021-06-13 08:16:26,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217842712] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:16:26,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:16:26,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:16:26,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335447583] [2021-06-13 08:16:26,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:16:26,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:16:26,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:16:26,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:16:26,337 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 26 [2021-06-13 08:16:26,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:16:26,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:16:26,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 26 [2021-06-13 08:16:26,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:16:26,343 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-13 08:16:26,343 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-06-13 08:16:26,343 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 08:16:26,344 INFO L132 encePairwiseOnDemand]: 24/26 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-06-13 08:16:26,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 48 flow [2021-06-13 08:16:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:16:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:16:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2021-06-13 08:16:26,345 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8846153846153846 [2021-06-13 08:16:26,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2021-06-13 08:16:26,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2021-06-13 08:16:26,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:16:26,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2021-06-13 08:16:26,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:16:26,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:16:26,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:16:26,347 INFO L185 Difference]: Start difference. First operand has 26 places, 18 transitions, 56 flow. Second operand 3 states and 69 transitions. [2021-06-13 08:16:26,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 48 flow [2021-06-13 08:16:26,348 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 08:16:26,348 INFO L241 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2021-06-13 08:16:26,348 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, 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 08:16:26,349 INFO L335 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2021-06-13 08:16:26,349 INFO L482 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2021-06-13 08:16:26,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:16:26,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 08:16:26,351 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:16:26,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:16:26 BasicIcfg [2021-06-13 08:16:26,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:16:26,355 INFO L168 Benchmark]: Toolchain (without parser) took 1057.66 ms. Allocated memory is still 183.5 MB. Free memory was 146.9 MB in the beginning and 109.8 MB in the end (delta: 37.1 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:26,355 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 165.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:16:26,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.63 ms. Allocated memory is still 183.5 MB. Free memory was 146.7 MB in the beginning and 166.9 MB in the end (delta: -20.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:26,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.58 ms. Allocated memory is still 183.5 MB. Free memory was 166.9 MB in the beginning and 165.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:26,356 INFO L168 Benchmark]: Boogie Preprocessor took 13.16 ms. Allocated memory is still 183.5 MB. Free memory was 165.4 MB in the beginning and 164.9 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:26,357 INFO L168 Benchmark]: RCFGBuilder took 240.94 ms. Allocated memory is still 183.5 MB. Free memory was 164.7 MB in the beginning and 150.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:26,357 INFO L168 Benchmark]: TraceAbstraction took 574.29 ms. Allocated memory is still 183.5 MB. Free memory was 149.7 MB in the beginning and 109.8 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-06-13 08:16:26,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 165.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 199.63 ms. Allocated memory is still 183.5 MB. Free memory was 146.7 MB in the beginning and 166.9 MB in the end (delta: -20.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.58 ms. Allocated memory is still 183.5 MB. Free memory was 166.9 MB in the beginning and 165.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.16 ms. Allocated memory is still 183.5 MB. Free memory was 165.4 MB in the beginning and 164.9 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 240.94 ms. Allocated memory is still 183.5 MB. Free memory was 164.7 MB in the beginning and 150.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 574.29 ms. Allocated memory is still 183.5 MB. Free memory was 149.7 MB in the beginning and 109.8 MB in the end (delta: 39.8 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: 35]: 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, 31 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 428.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 116.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 2 SDslu, 2 SDs, 0 SdLazy, 10 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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: 19.3ms SsaConstructionTime, 42.7ms SatisfiabilityAnalysisTime, 90.1ms 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...