/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:52:11,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:52:11,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:52:11,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:52:11,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:52:11,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:52:11,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:52:11,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:52:11,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:52:11,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:52:11,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:52:11,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:52:11,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:52:11,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:52:11,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:52:11,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:52:11,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:52:11,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:52:11,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:52:11,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:52:11,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:52:11,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:52:11,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:52:11,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:52:11,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 14:52:11,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:52:11,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:52:11,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:52:11,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:52:11,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:52:11,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:52:11,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:52:11,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:52:11,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:52:11,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:52:11,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:52:11,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:52:12,036 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:52:12,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:52:12,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:52:12,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:52:12,041 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:52:12,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:52:12,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:52:12,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:52:12,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:52:12,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:52:12,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:52:12,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:52:12,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:52:12,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:52:12,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:52:12,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:52:12,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:52:12,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:52:12,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:52:12,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:52:12,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:52:12,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:52:12,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:52:12,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:52:12,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:52:12,051 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:52:12,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:52:12,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:52:12,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:52:12,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:52:12,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:52:12,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:52:12,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:52:12,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:52:12,446 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:52:12,446 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-10-09 14:52:12,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518db821/c5b64ed245ec44569136ef899318321d/FLAG713134cf2 [2020-10-09 14:52:13,162 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:52:13,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-10-09 14:52:13,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518db821/c5b64ed245ec44569136ef899318321d/FLAG713134cf2 [2020-10-09 14:52:13,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7518db821/c5b64ed245ec44569136ef899318321d [2020-10-09 14:52:13,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:52:13,472 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:52:13,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:52:13,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:52:13,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:52:13,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:52:13" (1/1) ... [2020-10-09 14:52:13,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d98dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:13, skipping insertion in model container [2020-10-09 14:52:13,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:52:13" (1/1) ... [2020-10-09 14:52:13,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:52:13,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:52:14,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:52:14,072 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:52:14,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:52:14,221 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:52:14,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14 WrapperNode [2020-10-09 14:52:14,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:52:14,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:52:14,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:52:14,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:52:14,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:52:14,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:52:14,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:52:14,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:52:14,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (1/1) ... [2020-10-09 14:52:14,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:52:14,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:52:14,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:52:14,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:52:14,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (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 [2020-10-09 14:52:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 14:52:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:52:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-10-09 14:52:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-10-09 14:52:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:52:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:52:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:52:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:52:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-10-09 14:52:14,396 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-10-09 14:52:14,398 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:52:14,943 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:52:14,943 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-09 14:52:14,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:52:14 BoogieIcfgContainer [2020-10-09 14:52:14,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:52:14,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:52:14,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:52:14,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:52:14,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:52:13" (1/3) ... [2020-10-09 14:52:14,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a54a01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:52:14, skipping insertion in model container [2020-10-09 14:52:14,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:52:14" (2/3) ... [2020-10-09 14:52:14,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a54a01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:52:14, skipping insertion in model container [2020-10-09 14:52:14,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:52:14" (3/3) ... [2020-10-09 14:52:14,957 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-10-09 14:52:14,971 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:52:14,982 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:52:14,982 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:52:15,015 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,016 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,016 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,016 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,017 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,017 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,017 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,017 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,018 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,018 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,018 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,019 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,019 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,020 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,020 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,020 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,020 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,021 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,021 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,021 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,021 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,021 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,022 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,022 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,023 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,023 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,023 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,024 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,024 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,024 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,024 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,024 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,025 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,025 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,026 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,026 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,026 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,026 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,027 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,027 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,027 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,028 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,032 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,033 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,033 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,033 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,033 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,033 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,040 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,041 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,041 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,041 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,041 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,042 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,042 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,054 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,055 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,055 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,055 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,055 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,055 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,065 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,066 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,066 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,067 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,067 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,067 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,067 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:52:15,113 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-09 14:52:15,135 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:52:15,135 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:52:15,136 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:52:15,136 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:52:15,136 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:52:15,136 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:52:15,136 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:52:15,136 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:52:15,153 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 102 transitions, 272 flow [2020-10-09 14:52:15,230 INFO L129 PetriNetUnfolder]: 19/136 cut-off events. [2020-10-09 14:52:15,231 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-10-09 14:52:15,240 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 19/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 327 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2020-10-09 14:52:15,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 102 transitions, 272 flow [2020-10-09 14:52:15,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 82 transitions, 212 flow [2020-10-09 14:52:15,267 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2020-10-09 14:52:15,267 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:52:15,268 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:15,269 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:15,270 INFO L429 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:15,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1517774319, now seen corresponding path program 1 times [2020-10-09 14:52:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:15,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186841183] [2020-10-09 14:52:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 14:52:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:15,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:15,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186841183] [2020-10-09 14:52:15,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:15,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-09 14:52:15,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091552165] [2020-10-09 14:52:15,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:52:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:52:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:52:15,685 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 102 [2020-10-09 14:52:15,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 212 flow. Second operand 4 states. [2020-10-09 14:52:15,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:15,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 102 [2020-10-09 14:52:15,690 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:16,264 INFO L129 PetriNetUnfolder]: 449/1793 cut-off events. [2020-10-09 14:52:16,264 INFO L130 PetriNetUnfolder]: For 392/392 co-relation queries the response was YES. [2020-10-09 14:52:16,288 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 1793 events. 449/1793 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16394 event pairs, 84 based on Foata normal form. 82/1767 useless extension candidates. Maximal degree in co-relation 2324. Up to 310 conditions per place. [2020-10-09 14:52:16,306 INFO L132 encePairwiseOnDemand]: 90/102 looper letters, 21 selfloop transitions, 18 changer transitions 0/105 dead transitions. [2020-10-09 14:52:16,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 336 flow [2020-10-09 14:52:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 14:52:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 14:52:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 481 transitions. [2020-10-09 14:52:16,336 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9431372549019608 [2020-10-09 14:52:16,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 481 transitions. [2020-10-09 14:52:16,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 481 transitions. [2020-10-09 14:52:16,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:16,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 481 transitions. [2020-10-09 14:52:16,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 14:52:16,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 14:52:16,363 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 14:52:16,366 INFO L185 Difference]: Start difference. First operand has 84 places, 82 transitions, 212 flow. Second operand 5 states and 481 transitions. [2020-10-09 14:52:16,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 336 flow [2020-10-09 14:52:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 304 flow, removed 0 selfloop flow, removed 8 redundant places. [2020-10-09 14:52:16,392 INFO L241 Difference]: Finished difference. Result has 84 places, 97 transitions, 314 flow [2020-10-09 14:52:16,398 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2020-10-09 14:52:16,399 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2020-10-09 14:52:16,400 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 314 flow [2020-10-09 14:52:16,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:52:16,400 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:16,401 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:16,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:52:16,617 INFO L429 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash 507076909, now seen corresponding path program 1 times [2020-10-09 14:52:16,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:16,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814880551] [2020-10-09 14:52:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:16,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 14:52:16,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:16,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:16,743 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-09 14:52:16,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:16,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814880551] [2020-10-09 14:52:16,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:16,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 14:52:16,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113417250] [2020-10-09 14:52:16,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:52:16,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:52:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:52:16,814 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 102 [2020-10-09 14:52:16,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 314 flow. Second operand 4 states. [2020-10-09 14:52:16,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:16,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 102 [2020-10-09 14:52:16,815 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:17,275 INFO L129 PetriNetUnfolder]: 490/2342 cut-off events. [2020-10-09 14:52:17,275 INFO L130 PetriNetUnfolder]: For 331/435 co-relation queries the response was YES. [2020-10-09 14:52:17,301 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 2342 events. 490/2342 cut-off events. For 331/435 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24246 event pairs, 72 based on Foata normal form. 36/2305 useless extension candidates. Maximal degree in co-relation 2374. Up to 272 conditions per place. [2020-10-09 14:52:17,319 INFO L132 encePairwiseOnDemand]: 96/102 looper letters, 3 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2020-10-09 14:52:17,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 97 transitions, 328 flow [2020-10-09 14:52:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 14:52:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 14:52:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2020-10-09 14:52:17,322 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9477124183006536 [2020-10-09 14:52:17,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2020-10-09 14:52:17,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2020-10-09 14:52:17,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:17,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2020-10-09 14:52:17,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 14:52:17,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 14:52:17,326 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 14:52:17,326 INFO L185 Difference]: Start difference. First operand has 84 places, 97 transitions, 314 flow. Second operand 3 states and 290 transitions. [2020-10-09 14:52:17,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 97 transitions, 328 flow [2020-10-09 14:52:17,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:52:17,333 INFO L241 Difference]: Finished difference. Result has 87 places, 97 transitions, 330 flow [2020-10-09 14:52:17,333 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2020-10-09 14:52:17,334 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2020-10-09 14:52:17,334 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 330 flow [2020-10-09 14:52:17,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:52:17,335 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:17,335 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:17,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:52:17,550 INFO L429 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -648717527, now seen corresponding path program 2 times [2020-10-09 14:52:17,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:17,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140827609] [2020-10-09 14:52:17,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:17,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:52:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:52:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:52:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:17,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:17,666 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 14:52:17,667 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:17,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140827609] [2020-10-09 14:52:17,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:17,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-10-09 14:52:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625831544] [2020-10-09 14:52:17,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 14:52:17,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 14:52:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 14:52:17,758 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 102 [2020-10-09 14:52:17,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 330 flow. Second operand 5 states. [2020-10-09 14:52:17,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:17,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 102 [2020-10-09 14:52:17,760 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:18,081 INFO L129 PetriNetUnfolder]: 391/1906 cut-off events. [2020-10-09 14:52:18,081 INFO L130 PetriNetUnfolder]: For 410/478 co-relation queries the response was YES. [2020-10-09 14:52:18,105 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 1906 events. 391/1906 cut-off events. For 410/478 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18881 event pairs, 21 based on Foata normal form. 32/1893 useless extension candidates. Maximal degree in co-relation 1877. Up to 256 conditions per place. [2020-10-09 14:52:18,120 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 8 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2020-10-09 14:52:18,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 392 flow [2020-10-09 14:52:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 14:52:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 14:52:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2020-10-09 14:52:18,123 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2020-10-09 14:52:18,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2020-10-09 14:52:18,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2020-10-09 14:52:18,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:18,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2020-10-09 14:52:18,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 14:52:18,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 14:52:18,128 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 14:52:18,128 INFO L185 Difference]: Start difference. First operand has 87 places, 97 transitions, 330 flow. Second operand 4 states and 391 transitions. [2020-10-09 14:52:18,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 392 flow [2020-10-09 14:52:18,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:52:18,135 INFO L241 Difference]: Finished difference. Result has 91 places, 104 transitions, 390 flow [2020-10-09 14:52:18,136 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=91, PETRI_TRANSITIONS=104} [2020-10-09 14:52:18,136 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 7 predicate places. [2020-10-09 14:52:18,137 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 104 transitions, 390 flow [2020-10-09 14:52:18,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 14:52:18,137 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:18,137 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:18,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 14:52:18,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2139995975, now seen corresponding path program 1 times [2020-10-09 14:52:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:18,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070293228] [2020-10-09 14:52:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 14:52:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:18,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:18,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070293228] [2020-10-09 14:52:18,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:18,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-09 14:52:18,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668642298] [2020-10-09 14:52:18,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 14:52:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 14:52:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 14:52:18,551 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 102 [2020-10-09 14:52:18,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 104 transitions, 390 flow. Second operand 4 states. [2020-10-09 14:52:18,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:18,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 102 [2020-10-09 14:52:18,552 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:18,948 INFO L129 PetriNetUnfolder]: 446/2023 cut-off events. [2020-10-09 14:52:18,948 INFO L130 PetriNetUnfolder]: For 924/1015 co-relation queries the response was YES. [2020-10-09 14:52:18,974 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 2023 events. 446/2023 cut-off events. For 924/1015 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19443 event pairs, 47 based on Foata normal form. 68/2040 useless extension candidates. Maximal degree in co-relation 1752. Up to 258 conditions per place. [2020-10-09 14:52:18,988 INFO L132 encePairwiseOnDemand]: 92/102 looper letters, 28 selfloop transitions, 24 changer transitions 0/129 dead transitions. [2020-10-09 14:52:18,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 613 flow [2020-10-09 14:52:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 14:52:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 14:52:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2020-10-09 14:52:18,992 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9176470588235294 [2020-10-09 14:52:18,992 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2020-10-09 14:52:18,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2020-10-09 14:52:18,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:18,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2020-10-09 14:52:18,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 14:52:18,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 14:52:18,995 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 14:52:18,995 INFO L185 Difference]: Start difference. First operand has 91 places, 104 transitions, 390 flow. Second operand 5 states and 468 transitions. [2020-10-09 14:52:18,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 613 flow [2020-10-09 14:52:19,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 611 flow, removed 1 selfloop flow, removed 0 redundant places. [2020-10-09 14:52:19,004 INFO L241 Difference]: Finished difference. Result has 99 places, 124 transitions, 616 flow [2020-10-09 14:52:19,005 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=616, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2020-10-09 14:52:19,005 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 15 predicate places. [2020-10-09 14:52:19,005 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 616 flow [2020-10-09 14:52:19,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 14:52:19,006 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:19,006 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:19,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 14:52:19,220 INFO L429 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash -408240724, now seen corresponding path program 1 times [2020-10-09 14:52:19,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:19,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632566402] [2020-10-09 14:52:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:52:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:52:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:19,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:19,354 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 14:52:19,355 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:19,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632566402] [2020-10-09 14:52:19,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:19,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 7 [2020-10-09 14:52:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590211458] [2020-10-09 14:52:19,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 14:52:19,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 14:52:19,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-09 14:52:19,545 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 102 [2020-10-09 14:52:19,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 616 flow. Second operand 7 states. [2020-10-09 14:52:19,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:19,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 102 [2020-10-09 14:52:19,546 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:20,068 INFO L129 PetriNetUnfolder]: 540/2474 cut-off events. [2020-10-09 14:52:20,069 INFO L130 PetriNetUnfolder]: For 1910/2145 co-relation queries the response was YES. [2020-10-09 14:52:20,091 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4673 conditions, 2474 events. 540/2474 cut-off events. For 1910/2145 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25272 event pairs, 31 based on Foata normal form. 48/2454 useless extension candidates. Maximal degree in co-relation 3208. Up to 346 conditions per place. [2020-10-09 14:52:20,103 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 20 selfloop transitions, 15 changer transitions 9/146 dead transitions. [2020-10-09 14:52:20,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 828 flow [2020-10-09 14:52:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 14:52:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 14:52:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 843 transitions. [2020-10-09 14:52:20,107 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9183006535947712 [2020-10-09 14:52:20,107 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 843 transitions. [2020-10-09 14:52:20,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 843 transitions. [2020-10-09 14:52:20,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:20,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 843 transitions. [2020-10-09 14:52:20,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 14:52:20,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 14:52:20,114 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 14:52:20,114 INFO L185 Difference]: Start difference. First operand has 99 places, 124 transitions, 616 flow. Second operand 9 states and 843 transitions. [2020-10-09 14:52:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 828 flow [2020-10-09 14:52:20,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 826 flow, removed 1 selfloop flow, removed 0 redundant places. [2020-10-09 14:52:20,126 INFO L241 Difference]: Finished difference. Result has 111 places, 129 transitions, 696 flow [2020-10-09 14:52:20,127 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=696, PETRI_PLACES=111, PETRI_TRANSITIONS=129} [2020-10-09 14:52:20,128 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2020-10-09 14:52:20,128 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 129 transitions, 696 flow [2020-10-09 14:52:20,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 14:52:20,128 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:20,128 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:20,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 14:52:20,341 INFO L429 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1239732906, now seen corresponding path program 2 times [2020-10-09 14:52:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307945659] [2020-10-09 14:52:20,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:20,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 14:52:20,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:52:20,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:52:20,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:52:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:52:20,484 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 14:52:20,485 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:52:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:52:20,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307945659] [2020-10-09 14:52:20,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:52:20,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2020-10-09 14:52:20,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075363025] [2020-10-09 14:52:20,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 14:52:20,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:52:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 14:52:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-09 14:52:20,661 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 102 [2020-10-09 14:52:20,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 129 transitions, 696 flow. Second operand 6 states. [2020-10-09 14:52:20,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:20,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 102 [2020-10-09 14:52:20,662 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:21,234 INFO L129 PetriNetUnfolder]: 581/2666 cut-off events. [2020-10-09 14:52:21,235 INFO L130 PetriNetUnfolder]: For 2519/2839 co-relation queries the response was YES. [2020-10-09 14:52:21,259 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5160 conditions, 2666 events. 581/2666 cut-off events. For 2519/2839 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27918 event pairs, 29 based on Foata normal form. 54/2636 useless extension candidates. Maximal degree in co-relation 4805. Up to 390 conditions per place. [2020-10-09 14:52:21,271 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 24 selfloop transitions, 18 changer transitions 5/149 dead transitions. [2020-10-09 14:52:21,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 149 transitions, 937 flow [2020-10-09 14:52:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 14:52:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 14:52:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2020-10-09 14:52:21,276 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9229691876750701 [2020-10-09 14:52:21,276 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2020-10-09 14:52:21,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2020-10-09 14:52:21,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:21,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2020-10-09 14:52:21,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 14:52:21,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 14:52:21,280 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 14:52:21,280 INFO L185 Difference]: Start difference. First operand has 111 places, 129 transitions, 696 flow. Second operand 7 states and 659 transitions. [2020-10-09 14:52:21,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 149 transitions, 937 flow [2020-10-09 14:52:21,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 149 transitions, 892 flow, removed 11 selfloop flow, removed 3 redundant places. [2020-10-09 14:52:21,300 INFO L241 Difference]: Finished difference. Result has 115 places, 135 transitions, 776 flow [2020-10-09 14:52:21,300 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=776, PETRI_PLACES=115, PETRI_TRANSITIONS=135} [2020-10-09 14:52:21,301 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 31 predicate places. [2020-10-09 14:52:21,301 INFO L481 AbstractCegarLoop]: Abstraction has has 115 places, 135 transitions, 776 flow [2020-10-09 14:52:21,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 14:52:21,302 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:21,302 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:21,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 14:52:21,517 INFO L429 AbstractCegarLoop]: === Iteration 7 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 14:52:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:21,518 INFO L82 PathProgramCache]: Analyzing trace with hash 68294730, now seen corresponding path program 3 times [2020-10-09 14:52:21,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:21,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820171386] [2020-10-09 14:52:21,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 14:52:21,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-09 14:52:21,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-09 14:52:21,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:52:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 14:52:21,629 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:52:21,734 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 14:52:21,734 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 14:52:21,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 14:52:21,958 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-09 14:52:21,958 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-09 14:52:21,960 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-09 14:52:21,960 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-09 14:52:21,961 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-10-09 14:52:21,961 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-10-09 14:52:22,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:52:22 BasicIcfg [2020-10-09 14:52:22,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:52:22,009 INFO L168 Benchmark]: Toolchain (without parser) took 8535.57 ms. Allocated memory was 251.7 MB in the beginning and 507.5 MB in the end (delta: 255.9 MB). Free memory was 207.7 MB in the beginning and 388.0 MB in the end (delta: -180.3 MB). Peak memory consumption was 75.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:22,010 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:52:22,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.32 ms. Allocated memory was 251.7 MB in the beginning and 316.1 MB in the end (delta: 64.5 MB). Free memory was 207.7 MB in the beginning and 272.0 MB in the end (delta: -64.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:22,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.44 ms. Allocated memory is still 316.1 MB. Free memory was 272.0 MB in the beginning and 269.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:22,012 INFO L168 Benchmark]: Boogie Preprocessor took 31.33 ms. Allocated memory is still 316.1 MB. Free memory was 269.5 MB in the beginning and 267.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:22,013 INFO L168 Benchmark]: RCFGBuilder took 635.00 ms. Allocated memory is still 316.1 MB. Free memory was 267.0 MB in the beginning and 237.6 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:22,014 INFO L168 Benchmark]: TraceAbstraction took 7057.73 ms. Allocated memory was 316.1 MB in the beginning and 507.5 MB in the end (delta: 191.4 MB). Free memory was 237.6 MB in the beginning and 388.0 MB in the end (delta: -150.4 MB). Peak memory consumption was 41.0 MB. Max. memory is 14.2 GB. [2020-10-09 14:52:22,018 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 749.32 ms. Allocated memory was 251.7 MB in the beginning and 316.1 MB in the end (delta: 64.5 MB). Free memory was 207.7 MB in the beginning and 272.0 MB in the end (delta: -64.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 55.44 ms. Allocated memory is still 316.1 MB. Free memory was 272.0 MB in the beginning and 269.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 31.33 ms. Allocated memory is still 316.1 MB. Free memory was 269.5 MB in the beginning and 267.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 635.00 ms. Allocated memory is still 316.1 MB. Free memory was 267.0 MB in the beginning and 237.6 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 7057.73 ms. Allocated memory was 316.1 MB in the beginning and 507.5 MB in the end (delta: 191.4 MB). Free memory was 237.6 MB in the beginning and 388.0 MB in the end (delta: -150.4 MB). Peak memory consumption was 41.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L677] 0 int w=0, r=0, x, y; VAL [r=0, w=0, x=0, y=0] [L703] 0 pthread_t t1, t2, t3, t4; VAL [r=0, w=0, x=0, y=0] [L704] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L705] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L693] 2 int l; VAL [r=0, w=0, x=0, y=0] [L694] CALL 2 __VERIFIER_atomic_take_read_lock() [L683] CALL 2 assume_abort_if_not(w==0) [L3] COND TRUE 2 !cond [L683] RET 2 assume_abort_if_not(w==0) [L684] 2 r = r+1 [L694] RET 2 __VERIFIER_atomic_take_read_lock() [L695] 2 l = x VAL [r=1, w=0, x=0, y=0] [L696] 2 y = l VAL [r=1, w=0, x=0, y=0] [L697] COND FALSE 2 !(!(y == x)) VAL [r=1, w=0, x=0, y=0] [L698] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L706] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L707] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L693] 4 int l; VAL [r=1, w=0, x=0, y=0] [L694] CALL 4 __VERIFIER_atomic_take_read_lock() [L683] CALL 4 assume_abort_if_not(w==0) [L3] COND TRUE 4 !cond [L683] RET 4 assume_abort_if_not(w==0) [L684] 4 r = r+1 [L694] RET 4 __VERIFIER_atomic_take_read_lock() [L695] 4 l = x VAL [r=2, w=0, x=0, y=0] [L696] 4 y = l VAL [r=2, w=0, x=0, y=0] [L699] 2 r = l VAL [r=0, w=0, x=0, y=0] [L687] CALL 1 __VERIFIER_atomic_take_write_lock() [L679] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L679] RET 1 assume_abort_if_not(w==0 && r==0) [L680] 1 w = 1 [L687] RET 1 __VERIFIER_atomic_take_write_lock() [L688] 1 x = 3 VAL [r=0, w=1, x=3, y=0] [L697] COND TRUE 4 !(y == x) VAL [r=0, w=1, x=3, y=0] [L697] 4 __VERIFIER_error() VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 6.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 46 SDtfs, 106 SDslu, 52 SDs, 0 SdLazy, 287 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 353 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=776occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 380 ConstructedInterpolants, 0 QuantifiedInterpolants, 26793 SizeOfPredicates, 21 NumberOfNonLiveVariables, 642 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...