/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 18:55:46,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 18:55:46,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 18:55:46,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 18:55:46,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 18:55:46,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 18:55:46,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 18:55:46,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 18:55:46,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 18:55:46,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 18:55:46,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 18:55:46,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 18:55:46,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 18:55:46,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 18:55:46,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 18:55:46,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 18:55:46,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 18:55:46,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 18:55:46,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 18:55:46,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 18:55:46,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 18:55:46,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 18:55:46,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 18:55:46,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 18:55:46,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 18:55:46,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 18:55:46,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 18:55:46,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 18:55:46,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 18:55:46,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 18:55:46,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 18:55:46,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 18:55:46,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 18:55:46,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 18:55:46,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 18:55:46,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 18:55:46,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 18:55:46,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 18:55:46,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 18:55:46,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 18:55:46,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 18:55:46,184 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 [2022-12-11 18:55:46,198 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 18:55:46,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 18:55:46,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 18:55:46,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 18:55:46,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 18:55:46,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 18:55:46,200 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 18:55:46,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 18:55:46,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 18:55:46,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 18:55:46,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 18:55:46,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 18:55:46,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 18:55:46,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 18:55:46,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 18:55:46,202 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 18:55:46,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 18:55:46,202 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 18:55:46,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 18:55:46,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 18:55:46,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 18:55:46,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:55:46,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 18:55:46,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 18:55:46,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 18:55:46,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-11 18:55:46,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 18:55:46,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 18:55:46,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 18:55:46,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 18:55:46,521 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 18:55:46,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2022-12-11 18:55:47,476 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 18:55:47,706 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 18:55:47,707 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2022-12-11 18:55:47,716 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27daf4e/43caf6459b834ee6a8af7790d2d5a639/FLAG1e3752210 [2022-12-11 18:55:47,728 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27daf4e/43caf6459b834ee6a8af7790d2d5a639 [2022-12-11 18:55:47,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 18:55:47,730 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 18:55:47,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 18:55:47,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 18:55:47,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 18:55:47,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:55:47" (1/1) ... [2022-12-11 18:55:47,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a0f611c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:47, skipping insertion in model container [2022-12-11 18:55:47,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:55:47" (1/1) ... [2022-12-11 18:55:47,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 18:55:47,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 18:55:47,883 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-11 18:55:47,993 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:55:47,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:55:47,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:55:47,996 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] [2022-12-11 18:55:48,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:55:48,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:55:48,014 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 18:55:48,029 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-11 18:55:48,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:55:48,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:55:48,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:55:48,047 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] [2022-12-11 18:55:48,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:55:48,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:55:48,084 INFO L208 MainTranslator]: Completed translation [2022-12-11 18:55:48,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48 WrapperNode [2022-12-11 18:55:48,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 18:55:48,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 18:55:48,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 18:55:48,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 18:55:48,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,139 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2022-12-11 18:55:48,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 18:55:48,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 18:55:48,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 18:55:48,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 18:55:48,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,166 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 18:55:48,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 18:55:48,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 18:55:48,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 18:55:48,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (1/1) ... [2022-12-11 18:55:48,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:55:48,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:55:48,199 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) [2022-12-11 18:55:48,202 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 [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-11 18:55:48,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 18:55:48,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 18:55:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-11 18:55:48,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 18:55:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 18:55:48,234 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 18:55:48,310 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 18:55:48,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 18:55:48,397 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 18:55:48,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 18:55:48,444 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-11 18:55:48,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:55:48 BoogieIcfgContainer [2022-12-11 18:55:48,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 18:55:48,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 18:55:48,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 18:55:48,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 18:55:48,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 06:55:47" (1/3) ... [2022-12-11 18:55:48,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec519a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:55:48, skipping insertion in model container [2022-12-11 18:55:48,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:55:48" (2/3) ... [2022-12-11 18:55:48,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec519a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:55:48, skipping insertion in model container [2022-12-11 18:55:48,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:55:48" (3/3) ... [2022-12-11 18:55:48,452 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2022-12-11 18:55:48,463 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 18:55:48,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 18:55:48,464 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 18:55:48,496 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 18:55:48,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2022-12-11 18:55:48,540 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2022-12-11 18:55:48,540 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 18:55:48,543 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. [2022-12-11 18:55:48,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2022-12-11 18:55:48,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2022-12-11 18:55:48,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:55:48,557 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;@685479f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:55:48,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 18:55:48,571 INFO L130 PetriNetUnfolder]: 2/44 cut-off events. [2022-12-11 18:55:48,571 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 18:55:48,571 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:48,572 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:55:48,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-11 18:55:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 930813123, now seen corresponding path program 1 times [2022-12-11 18:55:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:48,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621331946] [2022-12-11 18:55:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:55:48,655 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-11 18:55:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:55:48,696 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-11 18:55:48,697 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-11 18:55:48,698 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-11 18:55:48,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-11 18:55:48,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-11 18:55:48,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 18:55:48,700 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-11 18:55:48,702 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-11 18:55:48,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-11 18:55:48,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 18:55:48,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-12-11 18:55:48,771 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2022-12-11 18:55:48,771 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 18:55:48,772 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. [2022-12-11 18:55:48,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-12-11 18:55:48,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-12-11 18:55:48,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:55:48,776 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;@685479f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:55:48,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-11 18:55:48,786 INFO L130 PetriNetUnfolder]: 2/49 cut-off events. [2022-12-11 18:55:48,786 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-11 18:55:48,786 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:48,786 INFO L214 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] [2022-12-11 18:55:48,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-11 18:55:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:48,787 INFO L85 PathProgramCache]: Analyzing trace with hash -646241126, now seen corresponding path program 1 times [2022-12-11 18:55:48,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:48,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012302553] [2022-12-11 18:55:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:55:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:55:49,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:55:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012302553] [2022-12-11 18:55:49,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012302553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:55:49,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:55:49,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:55:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660339968] [2022-12-11 18:55:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:55:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 18:55:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:55:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 18:55:49,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 18:55:49,070 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 55 [2022-12-11 18:55:49,078 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) [2022-12-11 18:55:49,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:55:49,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 55 [2022-12-11 18:55:49,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:55:49,278 INFO L130 PetriNetUnfolder]: 85/308 cut-off events. [2022-12-11 18:55:49,278 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-11 18:55:49,280 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. [2022-12-11 18:55:49,283 INFO L137 encePairwiseOnDemand]: 45/55 looper letters, 40 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2022-12-11 18:55:49,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 272 flow [2022-12-11 18:55:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 18:55:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 18:55:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2022-12-11 18:55:49,295 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7545454545454545 [2022-12-11 18:55:49,296 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 6 states and 249 transitions. [2022-12-11 18:55:49,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 272 flow [2022-12-11 18:55:49,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 270 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-11 18:55:49,300 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 164 flow [2022-12-11 18:55:49,302 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2022-12-11 18:55:49,305 INFO L295 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2022-12-11 18:55:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 164 flow [2022-12-11 18:55:49,305 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) [2022-12-11 18:55:49,305 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:49,305 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:55:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-11 18:55:49,305 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)] === [2022-12-11 18:55:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 689144050, now seen corresponding path program 1 times [2022-12-11 18:55:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:49,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609041364] [2022-12-11 18:55:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:55:49,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-11 18:55:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:55:49,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-11 18:55:49,328 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-11 18:55:49,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-11 18:55:49,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-11 18:55:49,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-11 18:55:49,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-11 18:55:49,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-11 18:55:49,329 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-11 18:55:49,330 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-11 18:55:49,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-11 18:55:49,346 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 18:55:49,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2022-12-11 18:55:49,356 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-12-11 18:55:49,357 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-11 18:55:49,359 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. [2022-12-11 18:55:49,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2022-12-11 18:55:49,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2022-12-11 18:55:49,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:55:49,365 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;@685479f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:55:49,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-11 18:55:49,369 INFO L130 PetriNetUnfolder]: 2/49 cut-off events. [2022-12-11 18:55:49,369 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-11 18:55:49,370 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:49,370 INFO L214 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] [2022-12-11 18:55:49,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-11 18:55:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1540076050, now seen corresponding path program 1 times [2022-12-11 18:55:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997480640] [2022-12-11 18:55:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:55:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:55:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:55:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997480640] [2022-12-11 18:55:49,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997480640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:55:49,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:55:49,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:55:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913662912] [2022-12-11 18:55:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:55:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 18:55:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:55:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 18:55:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 18:55:49,516 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2022-12-11 18:55:49,516 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) [2022-12-11 18:55:49,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:55:49,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2022-12-11 18:55:49,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:55:50,056 INFO L130 PetriNetUnfolder]: 2447/4857 cut-off events. [2022-12-11 18:55:50,056 INFO L131 PetriNetUnfolder]: For 712/712 co-relation queries the response was YES. [2022-12-11 18:55:50,068 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. [2022-12-11 18:55:50,092 INFO L137 encePairwiseOnDemand]: 58/70 looper letters, 89 selfloop transitions, 12 changer transitions 0/133 dead transitions. [2022-12-11 18:55:50,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 133 transitions, 527 flow [2022-12-11 18:55:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 18:55:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 18:55:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 333 transitions. [2022-12-11 18:55:50,097 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7928571428571428 [2022-12-11 18:55:50,097 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 161 flow. Second operand 6 states and 333 transitions. [2022-12-11 18:55:50,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 133 transitions, 527 flow [2022-12-11 18:55:50,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 133 transitions, 513 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-12-11 18:55:50,101 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 234 flow [2022-12-11 18:55:50,102 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2022-12-11 18:55:50,102 INFO L295 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2022-12-11 18:55:50,103 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 234 flow [2022-12-11 18:55:50,103 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) [2022-12-11 18:55:50,103 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:50,103 INFO L214 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] [2022-12-11 18:55:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-11 18:55:50,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-11 18:55:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash 336946251, now seen corresponding path program 1 times [2022-12-11 18:55:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:50,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332924868] [2022-12-11 18:55:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:55:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-11 18:55:50,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:55:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332924868] [2022-12-11 18:55:50,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332924868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:55:50,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:55:50,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:55:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386233343] [2022-12-11 18:55:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:55:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 18:55:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:55:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 18:55:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 18:55:50,275 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2022-12-11 18:55:50,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 234 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) [2022-12-11 18:55:50,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:55:50,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2022-12-11 18:55:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:55:50,894 INFO L130 PetriNetUnfolder]: 3323/6724 cut-off events. [2022-12-11 18:55:50,895 INFO L131 PetriNetUnfolder]: For 2027/2037 co-relation queries the response was YES. [2022-12-11 18:55:50,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14475 conditions, 6724 events. 3323/6724 cut-off events. For 2027/2037 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 55853 event pairs, 1227 based on Foata normal form. 10/6143 useless extension candidates. Maximal degree in co-relation 14385. Up to 2718 conditions per place. [2022-12-11 18:55:50,942 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 94 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2022-12-11 18:55:50,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 146 transitions, 688 flow [2022-12-11 18:55:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 18:55:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 18:55:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2022-12-11 18:55:50,945 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7547619047619047 [2022-12-11 18:55:50,945 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 234 flow. Second operand 6 states and 317 transitions. [2022-12-11 18:55:50,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 146 transitions, 688 flow [2022-12-11 18:55:50,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 688 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-11 18:55:50,957 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 364 flow [2022-12-11 18:55:50,958 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2022-12-11 18:55:50,959 INFO L295 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2022-12-11 18:55:50,959 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 364 flow [2022-12-11 18:55:50,960 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) [2022-12-11 18:55:50,998 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:50,998 INFO L214 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] [2022-12-11 18:55:50,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-11 18:55:50,998 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)] === [2022-12-11 18:55:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1432583234, now seen corresponding path program 1 times [2022-12-11 18:55:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:51,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339684155] [2022-12-11 18:55:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:55:51,013 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-11 18:55:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:55:51,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-11 18:55:51,021 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-11 18:55:51,021 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-11 18:55:51,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-11 18:55:51,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-11 18:55:51,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-11 18:55:51,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-11 18:55:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-11 18:55:51,022 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-11 18:55:51,023 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-11 18:55:51,023 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-11 18:55:51,064 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 18:55:51,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2022-12-11 18:55:51,073 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-11 18:55:51,074 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-11 18:55:51,074 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. [2022-12-11 18:55:51,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2022-12-11 18:55:51,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2022-12-11 18:55:51,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:55:51,080 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;@685479f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:55:51,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-11 18:55:51,083 INFO L130 PetriNetUnfolder]: 2/49 cut-off events. [2022-12-11 18:55:51,083 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-11 18:55:51,083 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:51,083 INFO L214 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] [2022-12-11 18:55:51,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:55:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1687058479, now seen corresponding path program 1 times [2022-12-11 18:55:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:51,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389125770] [2022-12-11 18:55:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:55:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:55:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:55:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389125770] [2022-12-11 18:55:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389125770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:55:51,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:55:51,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:55:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163508870] [2022-12-11 18:55:51,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:55:51,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 18:55:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:55:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 18:55:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 18:55:51,146 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2022-12-11 18:55:51,146 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) [2022-12-11 18:55:51,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:55:51,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2022-12-11 18:55:51,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:55:56,262 INFO L130 PetriNetUnfolder]: 44351/70794 cut-off events. [2022-12-11 18:55:56,262 INFO L131 PetriNetUnfolder]: For 15385/15385 co-relation queries the response was YES. [2022-12-11 18:55:56,417 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. [2022-12-11 18:55:56,747 INFO L137 encePairwiseOnDemand]: 71/85 looper letters, 126 selfloop transitions, 15 changer transitions 0/178 dead transitions. [2022-12-11 18:55:56,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 178 transitions, 744 flow [2022-12-11 18:55:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 18:55:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 18:55:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 405 transitions. [2022-12-11 18:55:56,750 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2022-12-11 18:55:56,750 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 202 flow. Second operand 6 states and 405 transitions. [2022-12-11 18:55:56,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 178 transitions, 744 flow [2022-12-11 18:55:56,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 178 transitions, 708 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-12-11 18:55:56,758 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 296 flow [2022-12-11 18:55:56,758 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2022-12-11 18:55:56,760 INFO L295 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2022-12-11 18:55:56,760 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 296 flow [2022-12-11 18:55:56,760 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) [2022-12-11 18:55:56,760 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:55:56,761 INFO L214 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] [2022-12-11 18:55:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-11 18:55:56,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:55:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:55:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 368241035, now seen corresponding path program 1 times [2022-12-11 18:55:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:55:56,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903244093] [2022-12-11 18:55:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:55:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:55:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:55:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-11 18:55:56,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:55:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903244093] [2022-12-11 18:55:56,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903244093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:55:56,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:55:56,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:55:56,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512925379] [2022-12-11 18:55:56,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:55:56,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 18:55:56,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:55:56,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 18:55:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 18:55:56,875 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2022-12-11 18:55:56,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 296 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) [2022-12-11 18:55:56,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:55:56,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2022-12-11 18:55:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:56:04,587 INFO L130 PetriNetUnfolder]: 69435/112973 cut-off events. [2022-12-11 18:56:04,587 INFO L131 PetriNetUnfolder]: For 39690/39756 co-relation queries the response was YES. [2022-12-11 18:56:05,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249368 conditions, 112973 events. 69435/112973 cut-off events. For 39690/39756 co-relation queries the response was YES. Maximal size of possible extension queue 4671. Compared 1078164 event pairs, 26947 based on Foata normal form. 66/102476 useless extension candidates. Maximal degree in co-relation 249277. Up to 51002 conditions per place. [2022-12-11 18:56:05,615 INFO L137 encePairwiseOnDemand]: 77/85 looper letters, 137 selfloop transitions, 25 changer transitions 0/200 dead transitions. [2022-12-11 18:56:05,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 200 transitions, 969 flow [2022-12-11 18:56:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-11 18:56:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-11 18:56:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2022-12-11 18:56:05,617 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7588235294117647 [2022-12-11 18:56:05,617 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 296 flow. Second operand 6 states and 387 transitions. [2022-12-11 18:56:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 200 transitions, 969 flow [2022-12-11 18:56:05,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 200 transitions, 969 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-11 18:56:05,871 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 467 flow [2022-12-11 18:56:05,871 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2022-12-11 18:56:05,888 INFO L295 CegarLoopForPetriNet]: 89 programPoint places, 11 predicate places. [2022-12-11 18:56:05,888 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 467 flow [2022-12-11 18:56:05,889 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) [2022-12-11 18:56:05,889 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:56:05,890 INFO L214 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] [2022-12-11 18:56:05,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-11 18:56:05,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:56:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:56:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1764536828, now seen corresponding path program 1 times [2022-12-11 18:56:05,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:56:05,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022517529] [2022-12-11 18:56:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:56:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:56:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:56:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-11 18:56:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:56:06,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022517529] [2022-12-11 18:56:06,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022517529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:56:06,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:56:06,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 18:56:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311443242] [2022-12-11 18:56:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:56:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-11 18:56:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:56:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-11 18:56:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-11 18:56:06,063 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-11 18:56:06,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 467 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) [2022-12-11 18:56:06,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:56:06,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-11 18:56:06,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:56:15,067 INFO L130 PetriNetUnfolder]: 73221/118422 cut-off events. [2022-12-11 18:56:15,068 INFO L131 PetriNetUnfolder]: For 79338/79338 co-relation queries the response was YES. [2022-12-11 18:56:15,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280015 conditions, 118422 events. 73221/118422 cut-off events. For 79338/79338 co-relation queries the response was YES. Maximal size of possible extension queue 5031. Compared 1123078 event pairs, 37459 based on Foata normal form. 1727/111711 useless extension candidates. Maximal degree in co-relation 264292. Up to 48918 conditions per place. [2022-12-11 18:56:16,135 INFO L137 encePairwiseOnDemand]: 72/85 looper letters, 199 selfloop transitions, 29 changer transitions 0/264 dead transitions. [2022-12-11 18:56:16,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 264 transitions, 1392 flow [2022-12-11 18:56:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 18:56:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 18:56:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 581 transitions. [2022-12-11 18:56:16,143 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7594771241830065 [2022-12-11 18:56:16,143 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 467 flow. Second operand 9 states and 581 transitions. [2022-12-11 18:56:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 264 transitions, 1392 flow [2022-12-11 18:56:16,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 264 transitions, 1392 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-11 18:56:16,227 INFO L231 Difference]: Finished difference. Result has 112 places, 118 transitions, 612 flow [2022-12-11 18:56:16,227 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=612, PETRI_PLACES=112, PETRI_TRANSITIONS=118} [2022-12-11 18:56:16,230 INFO L295 CegarLoopForPetriNet]: 89 programPoint places, 23 predicate places. [2022-12-11 18:56:16,231 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 118 transitions, 612 flow [2022-12-11 18:56:16,231 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) [2022-12-11 18:56:16,231 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:56:16,231 INFO L214 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] [2022-12-11 18:56:16,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-11 18:56:16,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:56:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:56:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash -490814038, now seen corresponding path program 2 times [2022-12-11 18:56:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:56:16,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45485809] [2022-12-11 18:56:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:56:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:56:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:56:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-11 18:56:16,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:56:16,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45485809] [2022-12-11 18:56:16,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45485809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:56:16,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:56:16,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-11 18:56:16,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078180039] [2022-12-11 18:56:16,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:56:16,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 18:56:16,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:56:16,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 18:56:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-11 18:56:16,322 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-11 18:56:16,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 118 transitions, 612 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) [2022-12-11 18:56:16,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:56:16,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-11 18:56:16,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:56:32,213 INFO L130 PetriNetUnfolder]: 104863/172574 cut-off events. [2022-12-11 18:56:32,214 INFO L131 PetriNetUnfolder]: For 217212/217212 co-relation queries the response was YES. [2022-12-11 18:56:32,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442726 conditions, 172574 events. 104863/172574 cut-off events. For 217212/217212 co-relation queries the response was YES. Maximal size of possible extension queue 7490. Compared 1748344 event pairs, 56039 based on Foata normal form. 666/161012 useless extension candidates. Maximal degree in co-relation 386069. Up to 101140 conditions per place. [2022-12-11 18:56:33,864 INFO L137 encePairwiseOnDemand]: 74/85 looper letters, 191 selfloop transitions, 37 changer transitions 0/264 dead transitions. [2022-12-11 18:56:33,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 264 transitions, 1678 flow [2022-12-11 18:56:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-11 18:56:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-11 18:56:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 517 transitions. [2022-12-11 18:56:33,866 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7602941176470588 [2022-12-11 18:56:33,866 INFO L175 Difference]: Start difference. First operand has 112 places, 118 transitions, 612 flow. Second operand 8 states and 517 transitions. [2022-12-11 18:56:33,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 264 transitions, 1678 flow [2022-12-11 18:56:35,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 264 transitions, 1612 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-11 18:56:35,686 INFO L231 Difference]: Finished difference. Result has 119 places, 141 transitions, 903 flow [2022-12-11 18:56:35,686 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2022-12-11 18:56:35,687 INFO L295 CegarLoopForPetriNet]: 89 programPoint places, 30 predicate places. [2022-12-11 18:56:35,687 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 903 flow [2022-12-11 18:56:35,687 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) [2022-12-11 18:56:35,687 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:56:35,687 INFO L214 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] [2022-12-11 18:56:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-11 18:56:35,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:56:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:56:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1903267762, now seen corresponding path program 3 times [2022-12-11 18:56:35,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:56:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580587979] [2022-12-11 18:56:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:56:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:56:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:56:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-11 18:56:35,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:56:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580587979] [2022-12-11 18:56:35,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580587979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:56:35,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:56:35,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-11 18:56:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348225577] [2022-12-11 18:56:35,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:56:35,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-11 18:56:35,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:56:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-11 18:56:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-11 18:56:35,770 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-11 18:56:35,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 transitions, 903 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) [2022-12-11 18:56:35,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:56:35,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-11 18:56:35,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:56:58,290 INFO L130 PetriNetUnfolder]: 150309/249437 cut-off events. [2022-12-11 18:56:58,291 INFO L131 PetriNetUnfolder]: For 404058/404058 co-relation queries the response was YES. [2022-12-11 18:56:59,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665882 conditions, 249437 events. 150309/249437 cut-off events. For 404058/404058 co-relation queries the response was YES. Maximal size of possible extension queue 11089. Compared 2682156 event pairs, 71624 based on Foata normal form. 666/233154 useless extension candidates. Maximal degree in co-relation 665764. Up to 130035 conditions per place. [2022-12-11 18:57:01,166 INFO L137 encePairwiseOnDemand]: 74/85 looper letters, 205 selfloop transitions, 53 changer transitions 0/294 dead transitions. [2022-12-11 18:57:01,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 294 transitions, 2180 flow [2022-12-11 18:57:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-11 18:57:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-11 18:57:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 512 transitions. [2022-12-11 18:57:01,169 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7529411764705882 [2022-12-11 18:57:01,169 INFO L175 Difference]: Start difference. First operand has 119 places, 141 transitions, 903 flow. Second operand 8 states and 512 transitions. [2022-12-11 18:57:01,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 294 transitions, 2180 flow [2022-12-11 18:57:09,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 294 transitions, 2153 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-11 18:57:09,433 INFO L231 Difference]: Finished difference. Result has 128 places, 175 transitions, 1476 flow [2022-12-11 18:57:09,433 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1476, PETRI_PLACES=128, PETRI_TRANSITIONS=175} [2022-12-11 18:57:09,433 INFO L295 CegarLoopForPetriNet]: 89 programPoint places, 39 predicate places. [2022-12-11 18:57:09,433 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 175 transitions, 1476 flow [2022-12-11 18:57:09,434 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) [2022-12-11 18:57:09,434 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:57:09,434 INFO L214 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] [2022-12-11 18:57:09,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-11 18:57:09,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:57:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:57:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash 269974672, now seen corresponding path program 4 times [2022-12-11 18:57:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:57:09,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69426938] [2022-12-11 18:57:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:57:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:57:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:57:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-11 18:57:09,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:57:09,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69426938] [2022-12-11 18:57:09,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69426938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:57:09,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:57:09,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-11 18:57:09,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814446380] [2022-12-11 18:57:09,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:57:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-11 18:57:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:57:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-11 18:57:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-11 18:57:09,552 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 85 [2022-12-11 18:57:09,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 175 transitions, 1476 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) [2022-12-11 18:57:09,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:57:09,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 85 [2022-12-11 18:57:09,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:57:34,473 INFO L130 PetriNetUnfolder]: 146289/249415 cut-off events. [2022-12-11 18:57:34,474 INFO L131 PetriNetUnfolder]: For 544057/544057 co-relation queries the response was YES. [2022-12-11 18:57:35,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688374 conditions, 249415 events. 146289/249415 cut-off events. For 544057/544057 co-relation queries the response was YES. Maximal size of possible extension queue 11061. Compared 2768108 event pairs, 42018 based on Foata normal form. 3941/235047 useless extension candidates. Maximal degree in co-relation 646985. Up to 82801 conditions per place. [2022-12-11 18:57:37,116 INFO L137 encePairwiseOnDemand]: 70/85 looper letters, 289 selfloop transitions, 113 changer transitions 0/438 dead transitions. [2022-12-11 18:57:37,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 438 transitions, 3306 flow [2022-12-11 18:57:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-11 18:57:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-11 18:57:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 897 transitions. [2022-12-11 18:57:37,120 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.753781512605042 [2022-12-11 18:57:37,120 INFO L175 Difference]: Start difference. First operand has 128 places, 175 transitions, 1476 flow. Second operand 14 states and 897 transitions. [2022-12-11 18:57:37,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 438 transitions, 3306 flow [2022-12-11 18:57:46,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 438 transitions, 3279 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-11 18:57:46,348 INFO L231 Difference]: Finished difference. Result has 144 places, 201 transitions, 2091 flow [2022-12-11 18:57:46,349 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2091, PETRI_PLACES=144, PETRI_TRANSITIONS=201} [2022-12-11 18:57:46,349 INFO L295 CegarLoopForPetriNet]: 89 programPoint places, 55 predicate places. [2022-12-11 18:57:46,349 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 201 transitions, 2091 flow [2022-12-11 18:57:46,350 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) [2022-12-11 18:57:46,350 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:57:46,350 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-12-11 18:57:46,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-11 18:57:46,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-11 18:57:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:57:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1339327378, now seen corresponding path program 1 times [2022-12-11 18:57:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:57:46,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795619344] [2022-12-11 18:57:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:57:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:57:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:57:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-11 18:57:46,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:57:46,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795619344] [2022-12-11 18:57:46,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795619344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:57:46,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:57:46,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:57:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990338964] [2022-12-11 18:57:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:57:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-11 18:57:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:57:46,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-11 18:57:46,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-11 18:57:46,424 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2022-12-11 18:57:46,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 201 transitions, 2091 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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) [2022-12-11 18:57:46,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:57:46,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2022-12-11 18:57:46,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand