/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:25:40,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:25:40,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:25:40,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 04:25:40,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 04:25:40,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 04:25:40,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 04:25:40,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 04:25:40,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 04:25:40,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 04:25:40,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 04:25:40,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 04:25:40,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 04:25:40,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 04:25:40,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 04:25:40,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 04:25:40,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 04:25:40,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 04:25:40,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 04:25:40,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 04:25:40,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 04:25:40,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 04:25:40,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 04:25:40,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 04:25:40,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 04:25:40,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 04:25:40,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 04:25:40,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 04:25:40,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 04:25:40,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 04:25:40,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 04:25:40,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 04:25:40,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 04:25:40,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 04:25:40,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 04:25:40,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 04:25:40,866 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 [2021-03-11 04:25:40,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:25:40,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:25:40,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:25:40,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:25:40,891 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:25:40,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:25:40,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:25:40,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:25:40,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:25:40,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:25:40,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:25:40,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:25:40,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:25:40,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:25:40,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:25:40,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:25:40,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:25:40,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:25:40,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:25:40,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:25:40,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:25:40,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:25:41,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:25:41,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:25:41,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:25:41,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 04:25:41,121 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 04:25:41,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c [2021-03-11 04:25:41,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f293890d4/9145d3dd34c04db4852a398f2f63877e/FLAG0f2c43814 [2021-03-11 04:25:41,491 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 04:25:41,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/atomic/07-return-before-end.c [2021-03-11 04:25:41,491 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-11 04:25:41,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f293890d4/9145d3dd34c04db4852a398f2f63877e/FLAG0f2c43814 [2021-03-11 04:25:41,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f293890d4/9145d3dd34c04db4852a398f2f63877e [2021-03-11 04:25:41,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:25:41,903 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 04:25:41,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 04:25:41,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 04:25:41,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 04:25:41,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 04:25:41" (1/1) ... [2021-03-11 04:25:41,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c26ef5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:41, skipping insertion in model container [2021-03-11 04:25:41,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 04:25:41" (1/1) ... [2021-03-11 04:25:41,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 04:25:41,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 04:25:42,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 04:25:42,033 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 04:25:42,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 04:25:42,051 INFO L208 MainTranslator]: Completed translation [2021-03-11 04:25:42,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42 WrapperNode [2021-03-11 04:25:42,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 04:25:42,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:25:42,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:25:42,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:25:42,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:25:42,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:25:42,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:25:42,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:25:42,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... [2021-03-11 04:25:42,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:25:42,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:25:42,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:25:42,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:25:42,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:25:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 04:25:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 04:25:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 04:25:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-11 04:25:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-11 04:25:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:25:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:25:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 04:25:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 04:25:42,169 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 04:25:42,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:25:42,377 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-11 04:25:42,378 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: fooEXIT is neither atomic block end nor error location. [2021-03-11 04:25:42,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:25:42 BoogieIcfgContainer [2021-03-11 04:25:42,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:25:42,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:25:42,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:25:42,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:25:42,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 04:25:41" (1/3) ... [2021-03-11 04:25:42,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d96a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:25:42, skipping insertion in model container [2021-03-11 04:25:42,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 04:25:42" (2/3) ... [2021-03-11 04:25:42,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d96a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:25:42, skipping insertion in model container [2021-03-11 04:25:42,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:25:42" (3/3) ... [2021-03-11 04:25:42,384 INFO L111 eAbstractionObserver]: Analyzing ICFG 07-return-before-end.c [2021-03-11 04:25:42,387 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:25:42,390 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 04:25:42,390 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:25:42,403 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,404 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,405 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,405 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,405 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,405 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,405 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,405 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,406 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,406 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,407 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,407 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,407 WARN L313 ript$VariableManager]: TermVariabe |fooThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,407 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:25:42,409 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:25:42,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-11 04:25:42,435 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:25:42,436 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:25:42,436 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:25:42,436 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:25:42,436 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:25:42,436 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:25:42,436 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:25:42,436 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:25:42,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 51 flow [2021-03-11 04:25:42,467 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-03-11 04:25:42,468 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:25:42,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 1/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2021-03-11 04:25:42,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 51 flow [2021-03-11 04:25:42,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 22 transitions, 47 flow [2021-03-11 04:25:42,483 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-03-11 04:25:42,483 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:25:42,484 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:25:42,485 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:25:42,485 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:25:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:25:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1918863577, now seen corresponding path program 1 times [2021-03-11 04:25:42,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:25:42,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933142589] [2021-03-11 04:25:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:25:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:25:42,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:25:42,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:25:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:25:42,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933142589] [2021-03-11 04:25:42,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:25:42,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 04:25:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995374502] [2021-03-11 04:25:42,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:25:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:25:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:25:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:25:42,623 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 23 [2021-03-11 04:25:42,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:25:42,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 23 [2021-03-11 04:25:42,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:25:42,652 INFO L129 PetriNetUnfolder]: 2/27 cut-off events. [2021-03-11 04:25:42,652 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:25:42,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 27 events. 2/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 33 event pairs, 1 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 25. Up to 5 conditions per place. [2021-03-11 04:25:42,653 INFO L132 encePairwiseOnDemand]: 20/23 looper letters, 1 selfloop transitions, 2 changer transitions 8/23 dead transitions. [2021-03-11 04:25:42,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 23 transitions, 61 flow [2021-03-11 04:25:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:25:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:25:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2021-03-11 04:25:42,661 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8840579710144928 [2021-03-11 04:25:42,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2021-03-11 04:25:42,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2021-03-11 04:25:42,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:25:42,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2021-03-11 04:25:42,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,670 INFO L185 Difference]: Start difference. First operand has 25 places, 22 transitions, 47 flow. Second operand 3 states and 61 transitions. [2021-03-11 04:25:42,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 23 transitions, 61 flow [2021-03-11 04:25:42,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 60 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 04:25:42,674 INFO L241 Difference]: Finished difference. Result has 27 places, 15 transitions, 40 flow [2021-03-11 04:25:42,675 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=27, PETRI_TRANSITIONS=15} [2021-03-11 04:25:42,676 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2021-03-11 04:25:42,676 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 15 transitions, 40 flow [2021-03-11 04:25:42,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,677 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:25:42,677 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:25:42,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:25:42,677 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:25:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:25:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1498181559, now seen corresponding path program 1 times [2021-03-11 04:25:42,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:25:42,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981781864] [2021-03-11 04:25:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:25:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:25:42,732 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:25:42,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:25:42,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:25:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:25:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981781864] [2021-03-11 04:25:42,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:25:42,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:25:42,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009377418] [2021-03-11 04:25:42,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:25:42,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:25:42,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:25:42,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:25:42,747 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 23 [2021-03-11 04:25:42,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 15 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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) [2021-03-11 04:25:42,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:25:42,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 23 [2021-03-11 04:25:42,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:25:42,774 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 04:25:42,775 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-11 04:25:42,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 17 events. 0/17 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-11 04:25:42,775 INFO L132 encePairwiseOnDemand]: 18/23 looper letters, 1 selfloop transitions, 4 changer transitions 1/16 dead transitions. [2021-03-11 04:25:42,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 57 flow [2021-03-11 04:25:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 04:25:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 04:25:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2021-03-11 04:25:42,779 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2021-03-11 04:25:42,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 71 transitions. [2021-03-11 04:25:42,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 71 transitions. [2021-03-11 04:25:42,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:25:42,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 71 transitions. [2021-03-11 04:25:42,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.75) internal successors, (71), 4 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) [2021-03-11 04:25:42,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,780 INFO L185 Difference]: Start difference. First operand has 27 places, 15 transitions, 40 flow. Second operand 4 states and 71 transitions. [2021-03-11 04:25:42,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 57 flow [2021-03-11 04:25:42,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 51 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 04:25:42,781 INFO L241 Difference]: Finished difference. Result has 23 places, 15 transitions, 50 flow [2021-03-11 04:25:42,782 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2021-03-11 04:25:42,782 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2021-03-11 04:25:42,782 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 50 flow [2021-03-11 04:25:42,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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) [2021-03-11 04:25:42,782 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:25:42,782 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:25:42,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:25:42,783 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:25:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:25:42,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1486932279, now seen corresponding path program 2 times [2021-03-11 04:25:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:25:42,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6829187] [2021-03-11 04:25:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:25:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:25:42,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:25:42,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:25:42,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:25:42,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:25:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:25:42,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6829187] [2021-03-11 04:25:42,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:25:42,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:25:42,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383257208] [2021-03-11 04:25:42,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:25:42,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:25:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:25:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:25:42,803 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 23 [2021-03-11 04:25:42,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:25:42,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 23 [2021-03-11 04:25:42,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:25:42,807 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 04:25:42,807 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 04:25:42,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 13 events. 0/13 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 04:25:42,807 INFO L132 encePairwiseOnDemand]: 21/23 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-11 04:25:42,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 42 flow [2021-03-11 04:25:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:25:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:25:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2021-03-11 04:25:42,808 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8695652173913043 [2021-03-11 04:25:42,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2021-03-11 04:25:42,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2021-03-11 04:25:42,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:25:42,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2021-03-11 04:25:42,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,809 INFO L185 Difference]: Start difference. First operand has 23 places, 15 transitions, 50 flow. Second operand 3 states and 60 transitions. [2021-03-11 04:25:42,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 42 flow [2021-03-11 04:25:42,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 32 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-03-11 04:25:42,810 INFO L241 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2021-03-11 04:25:42,810 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2021-03-11 04:25:42,810 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, -7 predicate places. [2021-03-11 04:25:42,810 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2021-03-11 04:25:42,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:25:42,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 04:25:42,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:25:42 BasicIcfg [2021-03-11 04:25:42,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:25:42,815 INFO L168 Benchmark]: Toolchain (without parser) took 915.04 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 235.8 MB in the beginning and 347.5 MB in the end (delta: -111.7 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.0 GB. [2021-03-11 04:25:42,815 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:25:42,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.74 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 226.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 04:25:42,816 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.57 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 226.4 MB in the beginning and 362.1 MB in the end (delta: -135.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 04:25:42,816 INFO L168 Benchmark]: Boogie Preprocessor took 17.72 ms. Allocated memory is still 377.5 MB. Free memory was 362.1 MB in the beginning and 361.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:25:42,817 INFO L168 Benchmark]: RCFGBuilder took 267.96 ms. Allocated memory is still 377.5 MB. Free memory was 361.0 MB in the beginning and 347.6 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-11 04:25:42,817 INFO L168 Benchmark]: TraceAbstraction took 433.76 ms. Allocated memory is still 377.5 MB. Free memory was 347.3 MB in the beginning and 347.5 MB in the end (delta: -204.4 kB). Peak memory consumption was 2.0 MB. Max. memory is 16.0 GB. [2021-03-11 04:25:42,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 147.74 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 226.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 38.57 ms. Allocated memory was 255.9 MB in the beginning and 377.5 MB in the end (delta: 121.6 MB). Free memory was 226.4 MB in the beginning and 362.1 MB in the end (delta: -135.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.72 ms. Allocated memory is still 377.5 MB. Free memory was 362.1 MB in the beginning and 361.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 267.96 ms. Allocated memory is still 377.5 MB. Free memory was 361.0 MB in the beginning and 347.6 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 433.76 ms. Allocated memory is still 377.5 MB. Free memory was 347.3 MB in the beginning and 347.5 MB in the end (delta: -204.4 kB). Peak memory consumption was 2.0 MB. Max. memory is 16.0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 378.1ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 99.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 2 SDslu, 2 SDs, 0 SdLazy, 10 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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: 5.8ms SsaConstructionTime, 29.7ms SatisfiabilityAnalysisTime, 101.9ms InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 82 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...