/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 16:15:30,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 16:15:30,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 16:15:30,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 16:15:30,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 16:15:30,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 16:15:30,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 16:15:30,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 16:15:30,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 16:15:30,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 16:15:30,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 16:15:30,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 16:15:30,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 16:15:30,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 16:15:30,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 16:15:30,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 16:15:30,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 16:15:30,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 16:15:30,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 16:15:30,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 16:15:30,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 16:15:30,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 16:15:30,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 16:15:30,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 16:15:30,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-06 16:15:30,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 16:15:30,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 16:15:30,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 16:15:30,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 16:15:30,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 16:15:30,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 16:15:30,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 16:15:30,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 16:15:30,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 16:15:30,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 16:15:30,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 16:15:30,975 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 [2022-12-06 16:15:31,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 16:15:31,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 16:15:31,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-06 16:15:31,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-06 16:15:31,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 16:15:31,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 16:15:31,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 16:15:31,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 16:15:31,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 16:15:31,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 16:15:31,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 16:15:31,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 16:15:31,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 16:15:31,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 16:15:31,011 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-06 16:15:31,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-06 16:15:31,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-06 16:15:31,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 16:15:31,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 16:15:31,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 16:15:31,403 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 16:15:31,404 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 16:15:31,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2022-12-06 16:15:32,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 16:15:32,614 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 16:15:32,614 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2022-12-06 16:15:32,625 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012f98b6c/0fbcb269fd3f4668b455ba4b3d297254/FLAG5dbe8629e [2022-12-06 16:15:32,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012f98b6c/0fbcb269fd3f4668b455ba4b3d297254 [2022-12-06 16:15:32,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 16:15:32,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 16:15:32,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 16:15:32,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 16:15:32,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 16:15:32,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:15:32" (1/1) ... [2022-12-06 16:15:32,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da51ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:32, skipping insertion in model container [2022-12-06 16:15:32,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:15:32" (1/1) ... [2022-12-06 16:15:32,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 16:15:32,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 16:15:32,816 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-06 16:15:32,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:32,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:32,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:32,925 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2022-12-06 16:15:32,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:32,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 16:15:32,939 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 16:15:32,954 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-06 16:15:32,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:32,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:32,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:32,972 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2022-12-06 16:15:32,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:32,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 16:15:33,002 INFO L208 MainTranslator]: Completed translation [2022-12-06 16:15:33,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33 WrapperNode [2022-12-06 16:15:33,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 16:15:33,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 16:15:33,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 16:15:33,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 16:15:33,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,046 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2022-12-06 16:15:33,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 16:15:33,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 16:15:33,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 16:15:33,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 16:15:33,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,074 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 16:15:33,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 16:15:33,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 16:15:33,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 16:15:33,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (1/1) ... [2022-12-06 16:15:33,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 16:15:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 16:15:33,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-06 16:15:33,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-06 16:15:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-06 16:15:33,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-06 16:15:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-06 16:15:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 16:15:33,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 16:15:33,170 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 16:15:33,294 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 16:15:33,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 16:15:33,401 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 16:15:33,446 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 16:15:33,446 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-06 16:15:33,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:15:33 BoogieIcfgContainer [2022-12-06 16:15:33,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 16:15:33,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 16:15:33,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 16:15:33,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 16:15:33,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:15:32" (1/3) ... [2022-12-06 16:15:33,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f44165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:15:33, skipping insertion in model container [2022-12-06 16:15:33,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:33" (2/3) ... [2022-12-06 16:15:33,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f44165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:15:33, skipping insertion in model container [2022-12-06 16:15:33,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:15:33" (3/3) ... [2022-12-06 16:15:33,462 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2022-12-06 16:15:33,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 16:15:33,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 16:15:33,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 16:15:33,532 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-06 16:15:33,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2022-12-06 16:15:33,605 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2022-12-06 16:15:33,605 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-06 16:15:33,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-12-06 16:15:33,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2022-12-06 16:15:33,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2022-12-06 16:15:33,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 16:15:33,635 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2315a97a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 16:15:33,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-06 16:15:33,658 INFO L130 PetriNetUnfolder]: 2/44 cut-off events. [2022-12-06 16:15:33,658 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-06 16:15:33,658 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:33,659 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:33,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-06 16:15:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash 930813123, now seen corresponding path program 1 times [2022-12-06 16:15:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:33,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768655084] [2022-12-06 16:15:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:33,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:33,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-06 16:15:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:33,828 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-06 16:15:33,829 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-06 16:15:33,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-06 16:15:33,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-06 16:15:33,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-06 16:15:33,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 16:15:33,833 INFO L458 BasicCegarLoop]: Path program histogram: [1] [2022-12-06 16:15:33,837 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-06 16:15:33,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-06 16:15:33,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-06 16:15:33,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-12-06 16:15:33,896 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2022-12-06 16:15:33,897 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-06 16:15:33,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2022-12-06 16:15:33,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-12-06 16:15:33,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-12-06 16:15:33,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 16:15:33,902 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2315a97a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 16:15:33,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-06 16:15:33,913 INFO L130 PetriNetUnfolder]: 2/49 cut-off events. [2022-12-06 16:15:33,913 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 16:15:33,914 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:33,914 INFO L213 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] [2022-12-06 16:15:33,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-06 16:15:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash -646241126, now seen corresponding path program 1 times [2022-12-06 16:15:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:33,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137968874] [2022-12-06 16:15:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:33,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:34,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137968874] [2022-12-06 16:15:34,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137968874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:34,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:34,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-06 16:15:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128273465] [2022-12-06 16:15:34,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 16:15:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 16:15:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-06 16:15:34,322 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 55 [2022-12-06 16:15:34,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2022-12-06 16:15:34,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:34,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 55 [2022-12-06 16:15:34,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:34,527 INFO L130 PetriNetUnfolder]: 85/308 cut-off events. [2022-12-06 16:15:34,528 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-06 16:15:34,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 308 events. 85/308 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1515 event pairs, 37 based on Foata normal form. 122/391 useless extension candidates. Maximal degree in co-relation 416. Up to 69 conditions per place. [2022-12-06 16:15:34,532 INFO L137 encePairwiseOnDemand]: 45/55 looper letters, 40 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2022-12-06 16:15:34,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 272 flow [2022-12-06 16:15:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 16:15:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 16:15:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2022-12-06 16:15:34,545 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7545454545454545 [2022-12-06 16:15:34,548 INFO L294 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2022-12-06 16:15:34,549 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 76 transitions, 272 flow [2022-12-06 16:15:34,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2022-12-06 16:15:34,551 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:34,551 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:34,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 16:15:34,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-06 16:15:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash 689144050, now seen corresponding path program 1 times [2022-12-06 16:15:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900255268] [2022-12-06 16:15:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:34,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:34,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-06 16:15:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:34,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-06 16:15:34,585 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-06 16:15:34,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-06 16:15:34,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-06 16:15:34,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-06 16:15:34,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-06 16:15:34,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-06 16:15:34,586 INFO L458 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-06 16:15:34,586 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-06 16:15:34,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-06 16:15:34,604 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-06 16:15:34,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2022-12-06 16:15:34,619 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-12-06 16:15:34,619 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-06 16:15:34,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2022-12-06 16:15:34,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2022-12-06 16:15:34,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2022-12-06 16:15:34,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 16:15:34,626 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2315a97a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 16:15:34,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-06 16:15:34,632 INFO L130 PetriNetUnfolder]: 2/49 cut-off events. [2022-12-06 16:15:34,632 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 16:15:34,632 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:34,632 INFO L213 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] [2022-12-06 16:15:34,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-06 16:15:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1540076050, now seen corresponding path program 1 times [2022-12-06 16:15:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:34,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748874674] [2022-12-06 16:15:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:34,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748874674] [2022-12-06 16:15:34,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748874674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:34,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:34,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-06 16:15:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119053413] [2022-12-06 16:15:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 16:15:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 16:15:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-06 16:15:34,797 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2022-12-06 16:15:34,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2022-12-06 16:15:34,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:34,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2022-12-06 16:15:34,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:35,305 INFO L130 PetriNetUnfolder]: 2447/4857 cut-off events. [2022-12-06 16:15:35,305 INFO L131 PetriNetUnfolder]: For 712/712 co-relation queries the response was YES. [2022-12-06 16:15:35,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9273 conditions, 4857 events. 2447/4857 cut-off events. For 712/712 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 37993 event pairs, 845 based on Foata normal form. 1527/5580 useless extension candidates. Maximal degree in co-relation 8051. Up to 1793 conditions per place. [2022-12-06 16:15:35,336 INFO L137 encePairwiseOnDemand]: 58/70 looper letters, 89 selfloop transitions, 12 changer transitions 0/133 dead transitions. [2022-12-06 16:15:35,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 133 transitions, 527 flow [2022-12-06 16:15:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 16:15:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 16:15:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 333 transitions. [2022-12-06 16:15:35,338 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-12-06 16:15:35,339 INFO L294 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2022-12-06 16:15:35,339 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 133 transitions, 527 flow [2022-12-06 16:15:35,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 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) [2022-12-06 16:15:35,339 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:35,339 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:35,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-06 16:15:35,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-06 16:15:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash 336946251, now seen corresponding path program 1 times [2022-12-06 16:15:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899378523] [2022-12-06 16:15:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:35,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-06 16:15:35,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:35,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899378523] [2022-12-06 16:15:35,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899378523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:35,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:35,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-06 16:15:35,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263927453] [2022-12-06 16:15:35,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:35,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 16:15:35,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 16:15:35,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-06 16:15:35,418 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2022-12-06 16:15:35,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 133 transitions, 527 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 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) [2022-12-06 16:15:35,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:35,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2022-12-06 16:15:35,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:36,123 INFO L130 PetriNetUnfolder]: 3422/6968 cut-off events. [2022-12-06 16:15:36,124 INFO L131 PetriNetUnfolder]: For 979/1080 co-relation queries the response was YES. [2022-12-06 16:15:36,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18662 conditions, 6968 events. 3422/6968 cut-off events. For 979/1080 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 58707 event pairs, 817 based on Foata normal form. 0/5847 useless extension candidates. Maximal degree in co-relation 15258. Up to 2718 conditions per place. [2022-12-06 16:15:36,184 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 174 selfloop transitions, 21 changer transitions 0/228 dead transitions. [2022-12-06 16:15:36,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 228 transitions, 1330 flow [2022-12-06 16:15:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 16:15:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 16:15:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2022-12-06 16:15:36,186 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7547619047619047 [2022-12-06 16:15:36,187 INFO L294 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2022-12-06 16:15:36,188 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 228 transitions, 1330 flow [2022-12-06 16:15:36,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 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) [2022-12-06 16:15:36,188 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:36,188 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-06 16:15:36,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-06 16:15:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1432583234, now seen corresponding path program 1 times [2022-12-06 16:15:36,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:36,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56960578] [2022-12-06 16:15:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:36,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-06 16:15:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:36,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-06 16:15:36,229 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-06 16:15:36,229 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-06 16:15:36,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-06 16:15:36,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-06 16:15:36,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-06 16:15:36,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-06 16:15:36,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-06 16:15:36,230 INFO L458 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-06 16:15:36,230 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-06 16:15:36,230 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-06 16:15:36,257 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-06 16:15:36,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2022-12-06 16:15:36,352 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-06 16:15:36,353 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-06 16:15:36,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2022-12-06 16:15:36,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2022-12-06 16:15:36,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2022-12-06 16:15:36,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 16:15:36,359 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2315a97a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 16:15:36,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-06 16:15:36,361 INFO L130 PetriNetUnfolder]: 2/49 cut-off events. [2022-12-06 16:15:36,361 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 16:15:36,362 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:36,362 INFO L213 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] [2022-12-06 16:15:36,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-06 16:15:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1687058479, now seen corresponding path program 1 times [2022-12-06 16:15:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263089956] [2022-12-06 16:15:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:36,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:36,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263089956] [2022-12-06 16:15:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263089956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:36,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:36,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-06 16:15:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365248850] [2022-12-06 16:15:36,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 16:15:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:36,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 16:15:36,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-06 16:15:36,465 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2022-12-06 16:15:36,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2022-12-06 16:15:36,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:36,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2022-12-06 16:15:36,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:41,525 INFO L130 PetriNetUnfolder]: 44351/70794 cut-off events. [2022-12-06 16:15:41,526 INFO L131 PetriNetUnfolder]: For 15385/15385 co-relation queries the response was YES. [2022-12-06 16:15:41,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139244 conditions, 70794 events. 44351/70794 cut-off events. For 15385/15385 co-relation queries the response was YES. Maximal size of possible extension queue 3210. Compared 618733 event pairs, 21629 based on Foata normal form. 17293/74853 useless extension candidates. Maximal degree in co-relation 58478. Up to 30317 conditions per place. [2022-12-06 16:15:42,063 INFO L137 encePairwiseOnDemand]: 71/85 looper letters, 126 selfloop transitions, 15 changer transitions 0/178 dead transitions. [2022-12-06 16:15:42,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 178 transitions, 744 flow [2022-12-06 16:15:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 16:15:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 16:15:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 405 transitions. [2022-12-06 16:15:42,066 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2022-12-06 16:15:42,068 INFO L294 CegarLoopForPetriNet]: 89 programPoint places, 0 predicate places. [2022-12-06 16:15:42,068 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 178 transitions, 744 flow [2022-12-06 16:15:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2022-12-06 16:15:42,068 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:42,068 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:42,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-06 16:15:42,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-06 16:15:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:42,069 INFO L85 PathProgramCache]: Analyzing trace with hash 368241035, now seen corresponding path program 1 times [2022-12-06 16:15:42,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:42,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344569161] [2022-12-06 16:15:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:42,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-06 16:15:42,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344569161] [2022-12-06 16:15:42,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344569161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:42,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:42,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-06 16:15:42,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927900701] [2022-12-06 16:15:42,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:42,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 16:15:42,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 16:15:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-06 16:15:42,156 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2022-12-06 16:15:42,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 178 transitions, 744 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2022-12-06 16:15:42,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:42,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2022-12-06 16:15:42,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:50,693 INFO L130 PetriNetUnfolder]: 70795/118232 cut-off events. [2022-12-06 16:15:50,693 INFO L131 PetriNetUnfolder]: For 27617/31005 co-relation queries the response was YES. [2022-12-06 16:15:50,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326043 conditions, 118232 events. 70795/118232 cut-off events. For 27617/31005 co-relation queries the response was YES. Maximal size of possible extension queue 5120. Compared 1167226 event pairs, 23746 based on Foata normal form. 34/97401 useless extension candidates. Maximal degree in co-relation 27452. Up to 51002 conditions per place. [2022-12-06 16:15:51,616 INFO L137 encePairwiseOnDemand]: 77/85 looper letters, 280 selfloop transitions, 27 changer transitions 0/345 dead transitions. [2022-12-06 16:15:51,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 345 transitions, 2122 flow [2022-12-06 16:15:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 16:15:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 16:15:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2022-12-06 16:15:51,618 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7588235294117647 [2022-12-06 16:15:51,618 INFO L294 CegarLoopForPetriNet]: 89 programPoint places, 5 predicate places. [2022-12-06 16:15:51,618 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 345 transitions, 2122 flow [2022-12-06 16:15:51,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2022-12-06 16:15:51,619 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:51,619 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2022-12-06 16:15:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-06 16:15:51,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-06 16:15:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash 458506100, now seen corresponding path program 1 times [2022-12-06 16:15:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633598483] [2022-12-06 16:15:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-06 16:15:51,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:51,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633598483] [2022-12-06 16:15:51,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633598483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:51,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:51,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 16:15:51,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965183705] [2022-12-06 16:15:51,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:51,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-06 16:15:51,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-06 16:15:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-06 16:15:51,740 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-06 16:15:51,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 345 transitions, 2122 flow. Second operand has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 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) [2022-12-06 16:15:51,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:51,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-06 16:15:51,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:16:01,591 INFO L130 PetriNetUnfolder]: 72477/122205 cut-off events. [2022-12-06 16:16:01,591 INFO L131 PetriNetUnfolder]: For 27590/31235 co-relation queries the response was YES. [2022-12-06 16:16:01,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438062 conditions, 122205 events. 72477/122205 cut-off events. For 27590/31235 co-relation queries the response was YES. Maximal size of possible extension queue 5364. Compared 1233003 event pairs, 23268 based on Foata normal form. 105/101598 useless extension candidates. Maximal degree in co-relation 52879. Up to 56577 conditions per place. [2022-12-06 16:16:02,867 INFO L137 encePairwiseOnDemand]: 72/85 looper letters, 343 selfloop transitions, 34 changer transitions 0/413 dead transitions. [2022-12-06 16:16:02,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 413 transitions, 3312 flow [2022-12-06 16:16:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-06 16:16:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-06 16:16:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 581 transitions. [2022-12-06 16:16:02,871 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7594771241830065 [2022-12-06 16:16:02,872 INFO L294 CegarLoopForPetriNet]: 89 programPoint places, 13 predicate places. [2022-12-06 16:16:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 413 transitions, 3312 flow [2022-12-06 16:16:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 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) [2022-12-06 16:16:02,872 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:16:02,872 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2022-12-06 16:16:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-06 16:16:02,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-06 16:16:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:16:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 72676010, now seen corresponding path program 2 times [2022-12-06 16:16:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:16:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4380182] [2022-12-06 16:16:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:16:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:16:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:16:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-06 16:16:02,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:16:02,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4380182] [2022-12-06 16:16:02,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4380182] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:16:02,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:16:02,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-06 16:16:02,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876647852] [2022-12-06 16:16:02,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:16:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 16:16:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:16:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 16:16:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-06 16:16:02,996 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-06 16:16:02,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 413 transitions, 3312 flow. Second operand has 6 states, 6 states have (on average 42.5) internal successors, (255), 6 states have internal predecessors, (255), 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) [2022-12-06 16:16:02,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:16:02,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-06 16:16:02,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:16:18,181 INFO L130 PetriNetUnfolder]: 103663/173373 cut-off events. [2022-12-06 16:16:18,181 INFO L131 PetriNetUnfolder]: For 37127/41984 co-relation queries the response was YES. [2022-12-06 16:16:18,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772727 conditions, 173373 events. 103663/173373 cut-off events. For 37127/41984 co-relation queries the response was YES. Maximal size of possible extension queue 7432. Compared 1810580 event pairs, 24938 based on Foata normal form. 150/145026 useless extension candidates. Maximal degree in co-relation 171217. Up to 101140 conditions per place. [2022-12-06 16:16:20,204 INFO L137 encePairwiseOnDemand]: 74/85 looper letters, 498 selfloop transitions, 39 changer transitions 0/573 dead transitions. [2022-12-06 16:16:20,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 573 transitions, 5755 flow [2022-12-06 16:16:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 16:16:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 16:16:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 517 transitions. [2022-12-06 16:16:20,206 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7602941176470588 [2022-12-06 16:16:20,207 INFO L294 CegarLoopForPetriNet]: 89 programPoint places, 20 predicate places. [2022-12-06 16:16:20,207 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 573 transitions, 5755 flow [2022-12-06 16:16:20,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.5) internal successors, (255), 6 states have internal predecessors, (255), 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) [2022-12-06 16:16:20,208 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:16:20,208 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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] [2022-12-06 16:16:20,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-06 16:16:20,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-06 16:16:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:16:20,209 INFO L85 PathProgramCache]: Analyzing trace with hash 269990000, now seen corresponding path program 1 times [2022-12-06 16:16:20,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:16:20,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207536861] [2022-12-06 16:16:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:16:20,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:16:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:16:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-06 16:16:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:16:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207536861] [2022-12-06 16:16:20,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207536861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:16:20,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:16:20,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 16:16:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34932286] [2022-12-06 16:16:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:16:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-06 16:16:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:16:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-06 16:16:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-06 16:16:20,308 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-06 16:16:20,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 573 transitions, 5755 flow. Second operand has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 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) [2022-12-06 16:16:20,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:16:20,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-06 16:16:20,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand