/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/weaver/parallel-misc-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 22:59:39,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 22:59:39,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 22:59:39,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 22:59:39,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 22:59:39,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 22:59:39,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 22:59:39,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 22:59:39,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 22:59:39,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 22:59:39,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 22:59:39,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 22:59:39,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 22:59:39,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 22:59:39,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 22:59:39,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 22:59:39,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 22:59:39,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 22:59:39,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 22:59:39,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 22:59:39,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 22:59:39,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 22:59:39,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 22:59:39,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 22:59:39,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 22:59:39,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 22:59:39,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 22:59:39,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 22:59:39,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 22:59:39,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 22:59:39,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 22:59:39,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 22:59:39,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 22:59:39,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 22:59:39,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 22:59:39,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 22:59:39,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 22:59:39,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 22:59:39,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 22:59:39,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 22:59:39,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 22:59:39,150 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 [2022-09-20 22:59:39,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 22:59:39,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 22:59:39,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 22:59:39,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 22:59:39,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 22:59:39,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 22:59:39,189 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 22:59:39,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 22:59:39,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 22:59:39,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 22:59:39,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 22:59:39,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 22:59:39,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 22:59:39,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 22:59:39,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 22:59:39,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 22:59:39,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 22:59:39,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 22:59:39,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 22:59:39,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 22:59:39,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 22:59:39,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 22:59:39,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 22:59:39,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:59:39,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 22:59:39,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 22:59:39,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 22:59:39,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 22:59:39,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 22:59:39,193 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 22:59:39,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 22:59:39,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 22:59:39,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 22:59:39,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 22:59:39,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 22:59:39,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 22:59:39,409 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 22:59:39,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2022-09-20 22:59:39,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca80432f/4804862b610745e2b2febfb8c2c1e093/FLAG4bc3e590d [2022-09-20 22:59:39,906 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 22:59:39,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2022-09-20 22:59:39,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca80432f/4804862b610745e2b2febfb8c2c1e093/FLAG4bc3e590d [2022-09-20 22:59:39,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca80432f/4804862b610745e2b2febfb8c2c1e093 [2022-09-20 22:59:39,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 22:59:39,925 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 22:59:39,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 22:59:39,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 22:59:39,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 22:59:39,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:59:39" (1/1) ... [2022-09-20 22:59:39,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f0581a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:39, skipping insertion in model container [2022-09-20 22:59:39,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:59:39" (1/1) ... [2022-09-20 22:59:39,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 22:59:39,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 22:59:40,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-09-20 22:59:40,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:59:40,121 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 22:59:40,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-09-20 22:59:40,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:59:40,168 INFO L208 MainTranslator]: Completed translation [2022-09-20 22:59:40,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40 WrapperNode [2022-09-20 22:59:40,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 22:59:40,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 22:59:40,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 22:59:40,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 22:59:40,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,208 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-09-20 22:59:40,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 22:59:40,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 22:59:40,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 22:59:40,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 22:59:40,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 22:59:40,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 22:59:40,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 22:59:40,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 22:59:40,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (1/1) ... [2022-09-20 22:59:40,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:59:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:40,265 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) [2022-09-20 22:59:40,267 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 [2022-09-20 22:59:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 22:59:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 22:59:40,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 22:59:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 22:59:40,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 22:59:40,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-20 22:59:40,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 22:59:40,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 22:59:40,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 22:59:40,295 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 22:59:40,347 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 22:59:40,348 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 22:59:40,511 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 22:59:40,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 22:59:40,545 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 22:59:40,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:59:40 BoogieIcfgContainer [2022-09-20 22:59:40,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 22:59:40,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 22:59:40,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 22:59:40,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 22:59:40,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 10:59:39" (1/3) ... [2022-09-20 22:59:40,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9d3b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:59:40, skipping insertion in model container [2022-09-20 22:59:40,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:59:40" (2/3) ... [2022-09-20 22:59:40,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9d3b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:59:40, skipping insertion in model container [2022-09-20 22:59:40,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:59:40" (3/3) ... [2022-09-20 22:59:40,554 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2022-09-20 22:59:40,567 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 22:59:40,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 22:59:40,567 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 22:59:40,648 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 22:59:40,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2022-09-20 22:59:40,763 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2022-09-20 22:59:40,763 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 22:59:40,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-09-20 22:59:40,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2022-09-20 22:59:40,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 200 flow [2022-09-20 22:59:40,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 22:59:40,791 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;@19f242ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 22:59:40,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 22:59:40,817 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-09-20 22:59:40,818 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 22:59:40,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:40,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:40,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1257593876, now seen corresponding path program 1 times [2022-09-20 22:59:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:40,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978259759] [2022-09-20 22:59:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:41,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978259759] [2022-09-20 22:59:41,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978259759] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:41,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:41,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 22:59:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659812996] [2022-09-20 22:59:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 22:59:41,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 22:59:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 22:59:41,106 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 105 [2022-09-20 22:59:41,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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) [2022-09-20 22:59:41,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:41,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 105 [2022-09-20 22:59:41,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:41,160 INFO L130 PetriNetUnfolder]: 13/115 cut-off events. [2022-09-20 22:59:41,160 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-09-20 22:59:41,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 115 events. 13/115 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 160 event pairs, 2 based on Foata normal form. 11/115 useless extension candidates. Maximal degree in co-relation 100. Up to 20 conditions per place. [2022-09-20 22:59:41,162 INFO L137 encePairwiseOnDemand]: 102/105 looper letters, 8 selfloop transitions, 0 changer transitions 1/88 dead transitions. [2022-09-20 22:59:41,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 210 flow [2022-09-20 22:59:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 22:59:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 22:59:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2022-09-20 22:59:41,175 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9380952380952381 [2022-09-20 22:59:41,176 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2022-09-20 22:59:41,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2022-09-20 22:59:41,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:41,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2022-09-20 22:59:41,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 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) [2022-09-20 22:59:41,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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) [2022-09-20 22:59:41,190 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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) [2022-09-20 22:59:41,191 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 200 flow. Second operand 2 states and 197 transitions. [2022-09-20 22:59:41,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 210 flow [2022-09-20 22:59:41,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 198 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 22:59:41,200 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 180 flow [2022-09-20 22:59:41,202 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=180, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2022-09-20 22:59:41,204 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, -5 predicate places. [2022-09-20 22:59:41,205 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 180 flow [2022-09-20 22:59:41,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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) [2022-09-20 22:59:41,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:41,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 22:59:41,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2053944047, now seen corresponding path program 1 times [2022-09-20 22:59:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:41,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813309911] [2022-09-20 22:59:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:41,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813309911] [2022-09-20 22:59:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813309911] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:41,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 22:59:41,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927547059] [2022-09-20 22:59:41,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:41,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 22:59:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 22:59:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-09-20 22:59:41,437 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2022-09-20 22:59:41,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 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) [2022-09-20 22:59:41,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:41,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2022-09-20 22:59:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:41,604 INFO L130 PetriNetUnfolder]: 64/257 cut-off events. [2022-09-20 22:59:41,608 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-20 22:59:41,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 257 events. 64/257 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 949 event pairs, 12 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 366. Up to 46 conditions per place. [2022-09-20 22:59:41,614 INFO L137 encePairwiseOnDemand]: 99/105 looper letters, 27 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2022-09-20 22:59:41,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 99 transitions, 272 flow [2022-09-20 22:59:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 22:59:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 22:59:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 508 transitions. [2022-09-20 22:59:41,619 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8063492063492064 [2022-09-20 22:59:41,619 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 508 transitions. [2022-09-20 22:59:41,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 508 transitions. [2022-09-20 22:59:41,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:41,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 508 transitions. [2022-09-20 22:59:41,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.66666666666667) internal successors, (508), 6 states have internal predecessors, (508), 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) [2022-09-20 22:59:41,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 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) [2022-09-20 22:59:41,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 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) [2022-09-20 22:59:41,624 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 180 flow. Second operand 6 states and 508 transitions. [2022-09-20 22:59:41,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 99 transitions, 272 flow [2022-09-20 22:59:41,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:59:41,627 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 205 flow [2022-09-20 22:59:41,627 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2022-09-20 22:59:41,627 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-09-20 22:59:41,627 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 205 flow [2022-09-20 22:59:41,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 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) [2022-09-20 22:59:41,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:41,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 22:59:41,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1431384273, now seen corresponding path program 2 times [2022-09-20 22:59:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:41,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832912538] [2022-09-20 22:59:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:41,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:41,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832912538] [2022-09-20 22:59:41,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832912538] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:41,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:41,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 22:59:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163573077] [2022-09-20 22:59:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 22:59:41,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 22:59:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-09-20 22:59:41,844 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 105 [2022-09-20 22:59:41,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 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) [2022-09-20 22:59:41,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:41,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 105 [2022-09-20 22:59:41,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:41,976 INFO L130 PetriNetUnfolder]: 66/261 cut-off events. [2022-09-20 22:59:41,976 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-09-20 22:59:41,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 261 events. 66/261 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 962 event pairs, 12 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 407. Up to 46 conditions per place. [2022-09-20 22:59:41,978 INFO L137 encePairwiseOnDemand]: 97/105 looper letters, 28 selfloop transitions, 8 changer transitions 0/102 dead transitions. [2022-09-20 22:59:41,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 102 transitions, 305 flow [2022-09-20 22:59:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 22:59:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 22:59:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 590 transitions. [2022-09-20 22:59:41,980 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8027210884353742 [2022-09-20 22:59:41,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 590 transitions. [2022-09-20 22:59:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 590 transitions. [2022-09-20 22:59:41,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:41,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 590 transitions. [2022-09-20 22:59:41,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.28571428571429) internal successors, (590), 7 states have internal predecessors, (590), 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) [2022-09-20 22:59:41,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 105.0) internal successors, (840), 8 states have internal predecessors, (840), 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) [2022-09-20 22:59:41,983 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 105.0) internal successors, (840), 8 states have internal predecessors, (840), 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) [2022-09-20 22:59:41,983 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 205 flow. Second operand 7 states and 590 transitions. [2022-09-20 22:59:41,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 102 transitions, 305 flow [2022-09-20 22:59:41,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 298 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-20 22:59:41,986 INFO L231 Difference]: Finished difference. Result has 100 places, 91 transitions, 231 flow [2022-09-20 22:59:41,987 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2022-09-20 22:59:41,988 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 6 predicate places. [2022-09-20 22:59:41,988 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 231 flow [2022-09-20 22:59:41,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.28571428571429) internal successors, (569), 7 states have internal predecessors, (569), 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) [2022-09-20 22:59:41,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:41,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:41,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 22:59:41,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1161394699, now seen corresponding path program 3 times [2022-09-20 22:59:41,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452840438] [2022-09-20 22:59:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:42,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452840438] [2022-09-20 22:59:42,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452840438] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:42,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:42,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 22:59:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926787879] [2022-09-20 22:59:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:42,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 22:59:42,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 22:59:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-09-20 22:59:42,105 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 105 [2022-09-20 22:59:42,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 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) [2022-09-20 22:59:42,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:42,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 105 [2022-09-20 22:59:42,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:42,266 INFO L130 PetriNetUnfolder]: 224/642 cut-off events. [2022-09-20 22:59:42,266 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-09-20 22:59:42,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 642 events. 224/642 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3542 event pairs, 49 based on Foata normal form. 6/573 useless extension candidates. Maximal degree in co-relation 1200. Up to 157 conditions per place. [2022-09-20 22:59:42,271 INFO L137 encePairwiseOnDemand]: 94/105 looper letters, 33 selfloop transitions, 7 changer transitions 36/138 dead transitions. [2022-09-20 22:59:42,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 138 transitions, 531 flow [2022-09-20 22:59:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 22:59:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 22:59:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 748 transitions. [2022-09-20 22:59:42,273 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7915343915343915 [2022-09-20 22:59:42,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 748 transitions. [2022-09-20 22:59:42,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 748 transitions. [2022-09-20 22:59:42,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:42,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 748 transitions. [2022-09-20 22:59:42,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.11111111111111) internal successors, (748), 9 states have internal predecessors, (748), 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) [2022-09-20 22:59:42,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 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) [2022-09-20 22:59:42,277 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 105.0) internal successors, (1050), 10 states have internal predecessors, (1050), 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) [2022-09-20 22:59:42,277 INFO L175 Difference]: Start difference. First operand has 100 places, 91 transitions, 231 flow. Second operand 9 states and 748 transitions. [2022-09-20 22:59:42,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 138 transitions, 531 flow [2022-09-20 22:59:42,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 138 transitions, 518 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 22:59:42,280 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 273 flow [2022-09-20 22:59:42,281 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=273, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2022-09-20 22:59:42,281 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 15 predicate places. [2022-09-20 22:59:42,281 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 273 flow [2022-09-20 22:59:42,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 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) [2022-09-20 22:59:42,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:42,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:42,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 22:59:42,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash -765765484, now seen corresponding path program 1 times [2022-09-20 22:59:42,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:42,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152669183] [2022-09-20 22:59:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:42,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:42,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:42,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152669183] [2022-09-20 22:59:42,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152669183] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:42,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784208695] [2022-09-20 22:59:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:42,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:42,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:42,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:42,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 22:59:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 22:59:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:42,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:42,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784208695] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:42,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-09-20 22:59:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138435062] [2022-09-20 22:59:42,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:42,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 22:59:42,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 22:59:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-09-20 22:59:42,628 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 105 [2022-09-20 22:59:42,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 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) [2022-09-20 22:59:42,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:42,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 105 [2022-09-20 22:59:42,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:42,763 INFO L130 PetriNetUnfolder]: 283/717 cut-off events. [2022-09-20 22:59:42,764 INFO L131 PetriNetUnfolder]: For 584/584 co-relation queries the response was YES. [2022-09-20 22:59:42,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 717 events. 283/717 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3901 event pairs, 11 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 1649. Up to 132 conditions per place. [2022-09-20 22:59:42,770 INFO L137 encePairwiseOnDemand]: 96/105 looper letters, 50 selfloop transitions, 20 changer transitions 0/138 dead transitions. [2022-09-20 22:59:42,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 622 flow [2022-09-20 22:59:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 22:59:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 22:59:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 632 transitions. [2022-09-20 22:59:42,772 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8598639455782313 [2022-09-20 22:59:42,772 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 632 transitions. [2022-09-20 22:59:42,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 632 transitions. [2022-09-20 22:59:42,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:42,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 632 transitions. [2022-09-20 22:59:42,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 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) [2022-09-20 22:59:42,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 105.0) internal successors, (840), 8 states have internal predecessors, (840), 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) [2022-09-20 22:59:42,775 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 105.0) internal successors, (840), 8 states have internal predecessors, (840), 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) [2022-09-20 22:59:42,775 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 273 flow. Second operand 7 states and 632 transitions. [2022-09-20 22:59:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 622 flow [2022-09-20 22:59:42,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 138 transitions, 596 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-09-20 22:59:42,781 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 454 flow [2022-09-20 22:59:42,781 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2022-09-20 22:59:42,782 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 18 predicate places. [2022-09-20 22:59:42,782 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 454 flow [2022-09-20 22:59:42,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 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) [2022-09-20 22:59:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:42,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:42,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 22:59:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:43,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -991275822, now seen corresponding path program 2 times [2022-09-20 22:59:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381776024] [2022-09-20 22:59:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:43,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381776024] [2022-09-20 22:59:43,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381776024] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:43,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:43,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 22:59:43,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095432330] [2022-09-20 22:59:43,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:43,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 22:59:43,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 22:59:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-20 22:59:43,099 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 105 [2022-09-20 22:59:43,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 454 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 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) [2022-09-20 22:59:43,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:43,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 105 [2022-09-20 22:59:43,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:43,151 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([259] L83-->L70: Formula: (not (= (mod v_thread2Thread1of1ForFork2_~lv_assert~1_5 256) 0)) InVars {thread2Thread1of1ForFork2_~lv_assert~1=v_thread2Thread1of1ForFork2_~lv_assert~1_5} OutVars{thread2Thread1of1ForFork2_~lv_assert~1=v_thread2Thread1of1ForFork2_~lv_assert~1_5} AuxVars[] AssignedVars[][68], [Black: 631#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 153#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0) (<= (div thread1Thread1of1ForFork1_~lv_assert~0 256) 0) (<= 0 ~pos~0)), 111#true, Black: 166#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), 24#L110-4true, Black: 635#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1)), 6#L46true, Black: 133#(<= (+ (* 256 (div thread1Thread1of1ForFork1_~lv_assert~0 256)) 1) thread1Thread1of1ForFork1_~lv_assert~0), 643#true, Black: 127#true, 633#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 35#L70true, 123#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 145#(<= 0 ~pos~0), Black: 118#(and (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 162#true, Black: 151#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 164#(= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0)))]) [2022-09-20 22:59:43,151 INFO L383 tUnfolder$Statistics]: this new event has 63 ancestors and is cut-off event [2022-09-20 22:59:43,152 INFO L386 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2022-09-20 22:59:43,152 INFO L386 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2022-09-20 22:59:43,152 INFO L386 tUnfolder$Statistics]: existing Event has 58 ancestors and is cut-off event [2022-09-20 22:59:43,180 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([259] L83-->L70: Formula: (not (= (mod v_thread2Thread1of1ForFork2_~lv_assert~1_5 256) 0)) InVars {thread2Thread1of1ForFork2_~lv_assert~1=v_thread2Thread1of1ForFork2_~lv_assert~1_5} OutVars{thread2Thread1of1ForFork2_~lv_assert~1=v_thread2Thread1of1ForFork2_~lv_assert~1_5} AuxVars[] AssignedVars[][68], [Black: 631#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 153#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0) (<= (div thread1Thread1of1ForFork1_~lv_assert~0 256) 0) (<= 0 ~pos~0)), 111#true, Black: 166#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), Black: 635#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1)), 73#thread3ENTRYtrue, 6#L46true, Black: 133#(<= (+ (* 256 (div thread1Thread1of1ForFork1_~lv_assert~0 256)) 1) thread1Thread1of1ForFork1_~lv_assert~0), Black: 127#true, 643#true, 4#L111-4true, 633#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 35#L70true, 123#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 145#(<= 0 ~pos~0), Black: 118#(and (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 162#true, Black: 164#(= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))), Black: 151#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0))]) [2022-09-20 22:59:43,181 INFO L383 tUnfolder$Statistics]: this new event has 69 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L386 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L386 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L386 tUnfolder$Statistics]: existing Event has 64 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([268] thread3ENTRY-->L92: Formula: (= (ite (= (ite (<= 0 v_~pos~0_9) 1 0) 0) 0 1) v_~v_assert~0_5) InVars {~pos~0=v_~pos~0_9} OutVars{~v_assert~0=v_~v_assert~0_5, ~pos~0=v_~pos~0_9} AuxVars[] AssignedVars[~v_assert~0][81], [Black: 631#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 153#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0) (<= (div thread1Thread1of1ForFork1_~lv_assert~0 256) 0) (<= 0 ~pos~0)), 111#true, Black: 635#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1)), 29#L59true, 133#(<= (+ (* 256 (div thread1Thread1of1ForFork1_~lv_assert~0 256)) 1) thread1Thread1of1ForFork1_~lv_assert~0), 166#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), Black: 127#true, 643#true, 57#L83true, 27#L92true, 4#L111-4true, Black: 633#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 123#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 118#(and (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 145#(<= 0 ~pos~0), Black: 162#true, Black: 164#(= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))), Black: 151#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0))]) [2022-09-20 22:59:43,181 INFO L383 tUnfolder$Statistics]: this new event has 68 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L386 tUnfolder$Statistics]: existing Event has 68 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L386 tUnfolder$Statistics]: existing Event has 63 ancestors and is cut-off event [2022-09-20 22:59:43,181 INFO L386 tUnfolder$Statistics]: existing Event has 63 ancestors and is cut-off event [2022-09-20 22:59:43,203 INFO L130 PetriNetUnfolder]: 187/616 cut-off events. [2022-09-20 22:59:43,203 INFO L131 PetriNetUnfolder]: For 1010/1095 co-relation queries the response was YES. [2022-09-20 22:59:43,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1639 conditions, 616 events. 187/616 cut-off events. For 1010/1095 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3537 event pairs, 25 based on Foata normal form. 18/563 useless extension candidates. Maximal degree in co-relation 1623. Up to 96 conditions per place. [2022-09-20 22:59:43,211 INFO L137 encePairwiseOnDemand]: 99/105 looper letters, 20 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2022-09-20 22:59:43,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 117 transitions, 523 flow [2022-09-20 22:59:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 22:59:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 22:59:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 440 transitions. [2022-09-20 22:59:43,213 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-09-20 22:59:43,214 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 440 transitions. [2022-09-20 22:59:43,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 440 transitions. [2022-09-20 22:59:43,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:43,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 440 transitions. [2022-09-20 22:59:43,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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) [2022-09-20 22:59:43,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 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) [2022-09-20 22:59:43,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 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) [2022-09-20 22:59:43,231 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 454 flow. Second operand 5 states and 440 transitions. [2022-09-20 22:59:43,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 117 transitions, 523 flow [2022-09-20 22:59:43,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 117 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:59:43,235 INFO L231 Difference]: Finished difference. Result has 118 places, 112 transitions, 480 flow [2022-09-20 22:59:43,236 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=118, PETRI_TRANSITIONS=112} [2022-09-20 22:59:43,236 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 24 predicate places. [2022-09-20 22:59:43,236 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 112 transitions, 480 flow [2022-09-20 22:59:43,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 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) [2022-09-20 22:59:43,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:43,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:43,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 22:59:43,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2107400376, now seen corresponding path program 1 times [2022-09-20 22:59:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171059813] [2022-09-20 22:59:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171059813] [2022-09-20 22:59:43,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171059813] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008641117] [2022-09-20 22:59:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:43,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:43,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:43,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 22:59:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 22:59:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:43,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:43,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008641117] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:43,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:43,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-09-20 22:59:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180329302] [2022-09-20 22:59:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 22:59:43,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 22:59:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-09-20 22:59:43,452 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 105 [2022-09-20 22:59:43,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 112 transitions, 480 flow. Second operand has 6 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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) [2022-09-20 22:59:43,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:43,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 105 [2022-09-20 22:59:43,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:43,644 INFO L130 PetriNetUnfolder]: 500/1412 cut-off events. [2022-09-20 22:59:43,644 INFO L131 PetriNetUnfolder]: For 3090/3126 co-relation queries the response was YES. [2022-09-20 22:59:43,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 conditions, 1412 events. 500/1412 cut-off events. For 3090/3126 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9793 event pairs, 81 based on Foata normal form. 63/1414 useless extension candidates. Maximal degree in co-relation 4204. Up to 294 conditions per place. [2022-09-20 22:59:43,657 INFO L137 encePairwiseOnDemand]: 100/105 looper letters, 63 selfloop transitions, 21 changer transitions 7/168 dead transitions. [2022-09-20 22:59:43,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1056 flow [2022-09-20 22:59:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 22:59:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 22:59:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 550 transitions. [2022-09-20 22:59:43,659 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.873015873015873 [2022-09-20 22:59:43,659 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 550 transitions. [2022-09-20 22:59:43,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 550 transitions. [2022-09-20 22:59:43,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:43,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 550 transitions. [2022-09-20 22:59:43,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.66666666666667) internal successors, (550), 6 states have internal predecessors, (550), 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) [2022-09-20 22:59:43,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 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) [2022-09-20 22:59:43,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 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) [2022-09-20 22:59:43,662 INFO L175 Difference]: Start difference. First operand has 118 places, 112 transitions, 480 flow. Second operand 6 states and 550 transitions. [2022-09-20 22:59:43,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1056 flow [2022-09-20 22:59:43,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 168 transitions, 1052 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 22:59:43,668 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 701 flow [2022-09-20 22:59:43,669 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2022-09-20 22:59:43,669 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 31 predicate places. [2022-09-20 22:59:43,669 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 701 flow [2022-09-20 22:59:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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) [2022-09-20 22:59:43,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:43,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:43,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 22:59:43,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-09-20 22:59:43,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash 72715508, now seen corresponding path program 2 times [2022-09-20 22:59:43,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:43,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103129543] [2022-09-20 22:59:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:43,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:43,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:43,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103129543] [2022-09-20 22:59:43,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103129543] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:43,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:43,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 22:59:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861667937] [2022-09-20 22:59:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 22:59:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 22:59:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-09-20 22:59:43,953 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 105 [2022-09-20 22:59:43,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 701 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 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) [2022-09-20 22:59:43,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:43,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 105 [2022-09-20 22:59:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:44,126 INFO L130 PetriNetUnfolder]: 452/1386 cut-off events. [2022-09-20 22:59:44,126 INFO L131 PetriNetUnfolder]: For 3439/3519 co-relation queries the response was YES. [2022-09-20 22:59:44,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 1386 events. 452/1386 cut-off events. For 3439/3519 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10027 event pairs, 82 based on Foata normal form. 38/1302 useless extension candidates. Maximal degree in co-relation 4307. Up to 257 conditions per place. [2022-09-20 22:59:44,136 INFO L137 encePairwiseOnDemand]: 99/105 looper letters, 22 selfloop transitions, 5 changer transitions 1/136 dead transitions. [2022-09-20 22:59:44,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 136 transitions, 785 flow [2022-09-20 22:59:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 22:59:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 22:59:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2022-09-20 22:59:44,138 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.84 [2022-09-20 22:59:44,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2022-09-20 22:59:44,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2022-09-20 22:59:44,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:44,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2022-09-20 22:59:44,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 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) [2022-09-20 22:59:44,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 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) [2022-09-20 22:59:44,141 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 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) [2022-09-20 22:59:44,141 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 701 flow. Second operand 5 states and 441 transitions. [2022-09-20 22:59:44,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 136 transitions, 785 flow [2022-09-20 22:59:44,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 136 transitions, 785 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:59:44,148 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 719 flow [2022-09-20 22:59:44,149 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=719, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2022-09-20 22:59:44,150 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 37 predicate places. [2022-09-20 22:59:44,151 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 719 flow [2022-09-20 22:59:44,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 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) [2022-09-20 22:59:44,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:44,151 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:44,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-09-20 22:59:44,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1843819487, now seen corresponding path program 1 times [2022-09-20 22:59:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:44,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408972213] [2022-09-20 22:59:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:44,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:44,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:44,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408972213] [2022-09-20 22:59:44,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408972213] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:44,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567218323] [2022-09-20 22:59:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:44,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:44,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:44,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 22:59:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 22:59:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:44,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567218323] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:44,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:44,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-09-20 22:59:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952819308] [2022-09-20 22:59:44,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 22:59:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 22:59:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-09-20 22:59:44,509 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 105 [2022-09-20 22:59:44,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 719 flow. Second operand has 14 states, 14 states have (on average 77.78571428571429) internal successors, (1089), 14 states have internal predecessors, (1089), 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) [2022-09-20 22:59:44,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:44,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 105 [2022-09-20 22:59:44,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:45,166 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([264] L71-->L78: Formula: (= v_~pos~0_5 (+ v_~pos~0_6 2)) InVars {~pos~0=v_~pos~0_6} OutVars{~pos~0=v_~pos~0_5} AuxVars[] AssignedVars[~pos~0][141], [Black: 631#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 111#true, Black: 635#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1)), 44#L54true, 133#(<= (+ (* 256 (div thread1Thread1of1ForFork1_~lv_assert~0 256)) 1) thread1Thread1of1ForFork1_~lv_assert~0), 166#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), 50#L78true, Black: 643#true, Black: 127#true, 647#(<= (+ (* 256 (div ~d1~0 256)) 1) ~d1~0), Black: 145#(<= 0 ~pos~0), Black: 151#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 153#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0) (<= (div thread1Thread1of1ForFork1_~lv_assert~0 256) 0) (<= 0 ~pos~0)), 1451#(not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0)), Black: 1122#(and (= ~v_assert~0 thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 655#(= (+ ~v_assert~0 (* (- 1) thread2Thread1of1ForFork2_~lv_assert~1)) 0), Black: 653#true, 1133#(<= (+ (* (div ~d2~0 256) 256) 1) ~d2~0), 657#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), Black: 1129#true, 27#L92true, 4#L111-4true, Black: 633#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 123#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 162#true, Black: 118#(and (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 164#(= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0)))]) [2022-09-20 22:59:45,167 INFO L383 tUnfolder$Statistics]: this new event has 74 ancestors and is cut-off event [2022-09-20 22:59:45,167 INFO L386 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-09-20 22:59:45,167 INFO L386 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-09-20 22:59:45,167 INFO L386 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-09-20 22:59:45,242 INFO L130 PetriNetUnfolder]: 1222/3312 cut-off events. [2022-09-20 22:59:45,242 INFO L131 PetriNetUnfolder]: For 12393/12584 co-relation queries the response was YES. [2022-09-20 22:59:45,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12258 conditions, 3312 events. 1222/3312 cut-off events. For 12393/12584 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28352 event pairs, 118 based on Foata normal form. 105/3338 useless extension candidates. Maximal degree in co-relation 12234. Up to 511 conditions per place. [2022-09-20 22:59:45,273 INFO L137 encePairwiseOnDemand]: 92/105 looper letters, 95 selfloop transitions, 60 changer transitions 63/296 dead transitions. [2022-09-20 22:59:45,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 296 transitions, 2541 flow [2022-09-20 22:59:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 22:59:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 22:59:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1717 transitions. [2022-09-20 22:59:45,277 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7786848072562358 [2022-09-20 22:59:45,277 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1717 transitions. [2022-09-20 22:59:45,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1717 transitions. [2022-09-20 22:59:45,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:45,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1717 transitions. [2022-09-20 22:59:45,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.76190476190476) internal successors, (1717), 21 states have internal predecessors, (1717), 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) [2022-09-20 22:59:45,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 105.0) internal successors, (2310), 22 states have internal predecessors, (2310), 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) [2022-09-20 22:59:45,285 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 105.0) internal successors, (2310), 22 states have internal predecessors, (2310), 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) [2022-09-20 22:59:45,285 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 719 flow. Second operand 21 states and 1717 transitions. [2022-09-20 22:59:45,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 296 transitions, 2541 flow [2022-09-20 22:59:45,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 296 transitions, 2537 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 22:59:45,308 INFO L231 Difference]: Finished difference. Result has 162 places, 180 transitions, 1484 flow [2022-09-20 22:59:45,308 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1484, PETRI_PLACES=162, PETRI_TRANSITIONS=180} [2022-09-20 22:59:45,309 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 68 predicate places. [2022-09-20 22:59:45,309 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 180 transitions, 1484 flow [2022-09-20 22:59:45,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.78571428571429) internal successors, (1089), 14 states have internal predecessors, (1089), 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) [2022-09-20 22:59:45,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:45,309 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:45,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 22:59:45,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:45,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1188369485, now seen corresponding path program 1 times [2022-09-20 22:59:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:45,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400656256] [2022-09-20 22:59:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:45,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400656256] [2022-09-20 22:59:45,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400656256] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302968785] [2022-09-20 22:59:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:45,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:45,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:45,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:45,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 22:59:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 22:59:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:45,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302968785] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:45,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:45,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-09-20 22:59:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547224172] [2022-09-20 22:59:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-09-20 22:59:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-09-20 22:59:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-09-20 22:59:45,868 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 105 [2022-09-20 22:59:45,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 180 transitions, 1484 flow. Second operand has 14 states, 14 states have (on average 77.57142857142857) internal successors, (1086), 14 states have internal predecessors, (1086), 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) [2022-09-20 22:59:45,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:45,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 105 [2022-09-20 22:59:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:46,859 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([264] L71-->L78: Formula: (= v_~pos~0_5 (+ v_~pos~0_6 2)) InVars {~pos~0=v_~pos~0_6} OutVars{~pos~0=v_~pos~0_5} AuxVars[] AssignedVars[~pos~0][146], [Black: 631#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 111#true, Black: 635#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1)), 44#L54true, Black: 1144#(<= 1 ~pos~0), Black: 1652#(and (<= 1 ~pos~0) (not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0))), 133#(<= (+ (* 256 (div thread1Thread1of1ForFork1_~lv_assert~0 256)) 1) thread1Thread1of1ForFork1_~lv_assert~0), 166#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), 50#L78true, Black: 1650#(and (= ~pos~0 0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0))), Black: 127#true, Black: 1668#(and (<= thread1Thread1of1ForFork1_~lv_assert~0 1) (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0)), Black: 643#true, Black: 1139#true, Black: 1656#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0) (not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0))), Black: 1658#(and (<= thread1Thread1of1ForFork1_~lv_assert~0 1) (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0) (<= 0 ~pos~0)), Black: 1660#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 1648#(and (= ~pos~0 0) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0))), Black: 1143#(<= 0 ~pos~0), Black: 1666#(and (<= thread1Thread1of1ForFork1_~lv_assert~0 1) (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 ~pos~0) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0)), Black: 1654#(and (<= 0 ~pos~0) (not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0))), 1994#(not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0)), 647#(<= (+ (* 256 (div ~d1~0 256)) 1) ~d1~0), Black: 145#(<= 0 ~pos~0), Black: 151#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 0 ~pos~0)), Black: 153#(and (<= 1 ~v_assert~0) (<= ~v_assert~0 1) (<= 1 thread1Thread1of1ForFork1_~lv_assert~0) (<= (div thread1Thread1of1ForFork1_~lv_assert~0 256) 0) (<= 0 ~pos~0)), Black: 1122#(and (= ~v_assert~0 thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), 1451#(not (<= (mod thread1Thread1of1ForFork1_~lv_assert~0 256) 0)), Black: 655#(= (+ ~v_assert~0 (* (- 1) thread2Thread1of1ForFork2_~lv_assert~1)) 0), Black: 653#true, 1133#(<= (+ (* (div ~d2~0 256) 256) 1) ~d2~0), 657#(<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1), Black: 1129#true, 27#L92true, 4#L111-4true, Black: 123#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 633#(and (= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0))) (<= (+ (* 256 (div thread2Thread1of1ForFork2_~lv_assert~1 256)) 1) thread2Thread1of1ForFork2_~lv_assert~1) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 118#(and (<= ~v_assert~0 (+ (* 256 (div ~v_assert~0 256)) 1)) (<= (+ (* 256 (div ~v_assert~0 256)) 1) ~v_assert~0)), Black: 162#true, Black: 164#(= 0 (+ ~v_assert~0 (* (- 1) thread1Thread1of1ForFork1_~lv_assert~0)))]) [2022-09-20 22:59:46,859 INFO L383 tUnfolder$Statistics]: this new event has 79 ancestors and is cut-off event [2022-09-20 22:59:46,859 INFO L386 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-09-20 22:59:46,859 INFO L386 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-09-20 22:59:46,859 INFO L386 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-09-20 22:59:47,049 INFO L130 PetriNetUnfolder]: 2045/5483 cut-off events. [2022-09-20 22:59:47,050 INFO L131 PetriNetUnfolder]: For 43043/43407 co-relation queries the response was YES. [2022-09-20 22:59:47,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27361 conditions, 5483 events. 2045/5483 cut-off events. For 43043/43407 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 50221 event pairs, 184 based on Foata normal form. 124/5510 useless extension candidates. Maximal degree in co-relation 27324. Up to 902 conditions per place. [2022-09-20 22:59:47,109 INFO L137 encePairwiseOnDemand]: 91/105 looper letters, 107 selfloop transitions, 84 changer transitions 134/402 dead transitions. [2022-09-20 22:59:47,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 402 transitions, 4708 flow [2022-09-20 22:59:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 22:59:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 22:59:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1709 transitions. [2022-09-20 22:59:47,137 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7750566893424037 [2022-09-20 22:59:47,137 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1709 transitions. [2022-09-20 22:59:47,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1709 transitions. [2022-09-20 22:59:47,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:47,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1709 transitions. [2022-09-20 22:59:47,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.38095238095238) internal successors, (1709), 21 states have internal predecessors, (1709), 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) [2022-09-20 22:59:47,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 105.0) internal successors, (2310), 22 states have internal predecessors, (2310), 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) [2022-09-20 22:59:47,143 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 105.0) internal successors, (2310), 22 states have internal predecessors, (2310), 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) [2022-09-20 22:59:47,143 INFO L175 Difference]: Start difference. First operand has 162 places, 180 transitions, 1484 flow. Second operand 21 states and 1709 transitions. [2022-09-20 22:59:47,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 402 transitions, 4708 flow [2022-09-20 22:59:47,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 402 transitions, 4370 flow, removed 166 selfloop flow, removed 3 redundant places. [2022-09-20 22:59:47,246 INFO L231 Difference]: Finished difference. Result has 190 places, 222 transitions, 2155 flow [2022-09-20 22:59:47,247 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2155, PETRI_PLACES=190, PETRI_TRANSITIONS=222} [2022-09-20 22:59:47,247 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 96 predicate places. [2022-09-20 22:59:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 222 transitions, 2155 flow [2022-09-20 22:59:47,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.57142857142857) internal successors, (1086), 14 states have internal predecessors, (1086), 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) [2022-09-20 22:59:47,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:47,248 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:47,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 22:59:47,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:47,464 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1228168912, now seen corresponding path program 2 times [2022-09-20 22:59:47,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:47,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376384123] [2022-09-20 22:59:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 22:59:47,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:47,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376384123] [2022-09-20 22:59:47,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376384123] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:47,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:47,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 22:59:47,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81023607] [2022-09-20 22:59:47,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 22:59:47,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 22:59:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 22:59:47,503 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 105 [2022-09-20 22:59:47,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 222 transitions, 2155 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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) [2022-09-20 22:59:47,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:47,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 105 [2022-09-20 22:59:47,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:48,075 INFO L130 PetriNetUnfolder]: 883/3319 cut-off events. [2022-09-20 22:59:48,075 INFO L131 PetriNetUnfolder]: For 29782/30167 co-relation queries the response was YES. [2022-09-20 22:59:48,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16054 conditions, 3319 events. 883/3319 cut-off events. For 29782/30167 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 31674 event pairs, 109 based on Foata normal form. 198/3414 useless extension candidates. Maximal degree in co-relation 16004. Up to 411 conditions per place. [2022-09-20 22:59:48,118 INFO L137 encePairwiseOnDemand]: 100/105 looper letters, 37 selfloop transitions, 5 changer transitions 14/221 dead transitions. [2022-09-20 22:59:48,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 221 transitions, 2110 flow [2022-09-20 22:59:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 22:59:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 22:59:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2022-09-20 22:59:48,119 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9023809523809524 [2022-09-20 22:59:48,119 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2022-09-20 22:59:48,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2022-09-20 22:59:48,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:48,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2022-09-20 22:59:48,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 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) [2022-09-20 22:59:48,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 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) [2022-09-20 22:59:48,121 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 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) [2022-09-20 22:59:48,121 INFO L175 Difference]: Start difference. First operand has 190 places, 222 transitions, 2155 flow. Second operand 4 states and 379 transitions. [2022-09-20 22:59:48,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 221 transitions, 2110 flow [2022-09-20 22:59:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 221 transitions, 1932 flow, removed 57 selfloop flow, removed 16 redundant places. [2022-09-20 22:59:48,237 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 1616 flow [2022-09-20 22:59:48,237 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1616, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2022-09-20 22:59:48,237 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 78 predicate places. [2022-09-20 22:59:48,237 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 1616 flow [2022-09-20 22:59:48,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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) [2022-09-20 22:59:48,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:48,238 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:48,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-20 22:59:48,238 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash -46830758, now seen corresponding path program 2 times [2022-09-20 22:59:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:48,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984421559] [2022-09-20 22:59:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:48,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 22:59:48,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984421559] [2022-09-20 22:59:48,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984421559] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:59:48,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:59:48,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 22:59:48,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922764031] [2022-09-20 22:59:48,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:59:48,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 22:59:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 22:59:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 22:59:48,272 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 105 [2022-09-20 22:59:48,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 1616 flow. Second operand has 4 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 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) [2022-09-20 22:59:48,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:48,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 105 [2022-09-20 22:59:48,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:48,849 INFO L130 PetriNetUnfolder]: 972/3213 cut-off events. [2022-09-20 22:59:48,849 INFO L131 PetriNetUnfolder]: For 20694/20839 co-relation queries the response was YES. [2022-09-20 22:59:48,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14549 conditions, 3213 events. 972/3213 cut-off events. For 20694/20839 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 28165 event pairs, 184 based on Foata normal form. 191/3270 useless extension candidates. Maximal degree in co-relation 14506. Up to 430 conditions per place. [2022-09-20 22:59:48,883 INFO L137 encePairwiseOnDemand]: 100/105 looper letters, 40 selfloop transitions, 5 changer transitions 3/208 dead transitions. [2022-09-20 22:59:48,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 208 transitions, 1736 flow [2022-09-20 22:59:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 22:59:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 22:59:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2022-09-20 22:59:48,885 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8976190476190476 [2022-09-20 22:59:48,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2022-09-20 22:59:48,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2022-09-20 22:59:48,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:48,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2022-09-20 22:59:48,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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) [2022-09-20 22:59:48,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 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) [2022-09-20 22:59:48,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 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) [2022-09-20 22:59:48,887 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 1616 flow. Second operand 4 states and 377 transitions. [2022-09-20 22:59:48,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 208 transitions, 1736 flow [2022-09-20 22:59:48,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 208 transitions, 1657 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-09-20 22:59:48,946 INFO L231 Difference]: Finished difference. Result has 170 places, 189 transitions, 1464 flow [2022-09-20 22:59:48,947 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1464, PETRI_PLACES=170, PETRI_TRANSITIONS=189} [2022-09-20 22:59:48,947 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 76 predicate places. [2022-09-20 22:59:48,947 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 189 transitions, 1464 flow [2022-09-20 22:59:48,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 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) [2022-09-20 22:59:48,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:48,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:48,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-09-20 22:59:48,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash 958538679, now seen corresponding path program 1 times [2022-09-20 22:59:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:48,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708889965] [2022-09-20 22:59:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708889965] [2022-09-20 22:59:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708889965] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001916893] [2022-09-20 22:59:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:49,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:49,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:49,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 22:59:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:49,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2022-09-20 22:59:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:49,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001916893] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:49,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:49,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 15 [2022-09-20 22:59:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477309448] [2022-09-20 22:59:49,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-09-20 22:59:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-09-20 22:59:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-09-20 22:59:49,309 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 105 [2022-09-20 22:59:49,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 189 transitions, 1464 flow. Second operand has 15 states, 15 states have (on average 77.93333333333334) internal successors, (1169), 15 states have internal predecessors, (1169), 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) [2022-09-20 22:59:49,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:49,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 105 [2022-09-20 22:59:49,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:50,659 INFO L130 PetriNetUnfolder]: 1988/5700 cut-off events. [2022-09-20 22:59:50,659 INFO L131 PetriNetUnfolder]: For 51169/51726 co-relation queries the response was YES. [2022-09-20 22:59:50,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29944 conditions, 5700 events. 1988/5700 cut-off events. For 51169/51726 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 53200 event pairs, 196 based on Foata normal form. 267/5813 useless extension candidates. Maximal degree in co-relation 29902. Up to 954 conditions per place. [2022-09-20 22:59:50,720 INFO L137 encePairwiseOnDemand]: 92/105 looper letters, 72 selfloop transitions, 118 changer transitions 128/395 dead transitions. [2022-09-20 22:59:50,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 395 transitions, 4414 flow [2022-09-20 22:59:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-09-20 22:59:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-09-20 22:59:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2110 transitions. [2022-09-20 22:59:50,725 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7728937728937729 [2022-09-20 22:59:50,725 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2110 transitions. [2022-09-20 22:59:50,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2110 transitions. [2022-09-20 22:59:50,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:50,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2110 transitions. [2022-09-20 22:59:50,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 81.15384615384616) internal successors, (2110), 26 states have internal predecessors, (2110), 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) [2022-09-20 22:59:50,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 105.0) internal successors, (2835), 27 states have internal predecessors, (2835), 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) [2022-09-20 22:59:50,736 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 105.0) internal successors, (2835), 27 states have internal predecessors, (2835), 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) [2022-09-20 22:59:50,736 INFO L175 Difference]: Start difference. First operand has 170 places, 189 transitions, 1464 flow. Second operand 26 states and 2110 transitions. [2022-09-20 22:59:50,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 395 transitions, 4414 flow [2022-09-20 22:59:50,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 395 transitions, 4414 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:59:50,865 INFO L231 Difference]: Finished difference. Result has 209 places, 223 transitions, 2249 flow [2022-09-20 22:59:50,865 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2249, PETRI_PLACES=209, PETRI_TRANSITIONS=223} [2022-09-20 22:59:50,866 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 115 predicate places. [2022-09-20 22:59:50,866 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 223 transitions, 2249 flow [2022-09-20 22:59:50,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.93333333333334) internal successors, (1169), 15 states have internal predecessors, (1169), 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) [2022-09-20 22:59:50,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:50,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:50,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 22:59:51,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-20 22:59:51,084 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1097426091, now seen corresponding path program 2 times [2022-09-20 22:59:51,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:51,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184796529] [2022-09-20 22:59:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:51,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184796529] [2022-09-20 22:59:51,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184796529] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:51,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580811658] [2022-09-20 22:59:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 22:59:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:51,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:51,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 22:59:51,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 22:59:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:59:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2022-09-20 22:59:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:51,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:51,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580811658] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:51,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:51,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 15 [2022-09-20 22:59:51,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352177412] [2022-09-20 22:59:51,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-09-20 22:59:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-09-20 22:59:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-09-20 22:59:51,510 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 105 [2022-09-20 22:59:51,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 223 transitions, 2249 flow. Second operand has 15 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 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) [2022-09-20 22:59:51,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:51,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 105 [2022-09-20 22:59:51,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:53,117 INFO L130 PetriNetUnfolder]: 2444/6694 cut-off events. [2022-09-20 22:59:53,117 INFO L131 PetriNetUnfolder]: For 114686/116044 co-relation queries the response was YES. [2022-09-20 22:59:53,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40226 conditions, 6694 events. 2444/6694 cut-off events. For 114686/116044 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 66342 event pairs, 423 based on Foata normal form. 426/6916 useless extension candidates. Maximal degree in co-relation 40169. Up to 1015 conditions per place. [2022-09-20 22:59:53,210 INFO L137 encePairwiseOnDemand]: 92/105 looper letters, 106 selfloop transitions, 201 changer transitions 77/461 dead transitions. [2022-09-20 22:59:53,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 461 transitions, 6572 flow [2022-09-20 22:59:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-09-20 22:59:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-09-20 22:59:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2094 transitions. [2022-09-20 22:59:53,213 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7670329670329671 [2022-09-20 22:59:53,214 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2094 transitions. [2022-09-20 22:59:53,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2094 transitions. [2022-09-20 22:59:53,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:53,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2094 transitions. [2022-09-20 22:59:53,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 80.53846153846153) internal successors, (2094), 26 states have internal predecessors, (2094), 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) [2022-09-20 22:59:53,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 105.0) internal successors, (2835), 27 states have internal predecessors, (2835), 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) [2022-09-20 22:59:53,223 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 105.0) internal successors, (2835), 27 states have internal predecessors, (2835), 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) [2022-09-20 22:59:53,223 INFO L175 Difference]: Start difference. First operand has 209 places, 223 transitions, 2249 flow. Second operand 26 states and 2094 transitions. [2022-09-20 22:59:53,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 461 transitions, 6572 flow [2022-09-20 22:59:53,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 461 transitions, 5859 flow, removed 308 selfloop flow, removed 17 redundant places. [2022-09-20 22:59:53,570 INFO L231 Difference]: Finished difference. Result has 223 places, 338 transitions, 4348 flow [2022-09-20 22:59:53,571 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4348, PETRI_PLACES=223, PETRI_TRANSITIONS=338} [2022-09-20 22:59:53,571 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 129 predicate places. [2022-09-20 22:59:53,571 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 338 transitions, 4348 flow [2022-09-20 22:59:53,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.0) internal successors, (1170), 15 states have internal predecessors, (1170), 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) [2022-09-20 22:59:53,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:59:53,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:59:53,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-09-20 22:59:53,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:53,783 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:59:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:59:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1233597549, now seen corresponding path program 3 times [2022-09-20 22:59:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:59:53,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817329334] [2022-09-20 22:59:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:59:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:59:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:59:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:53,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:59:53,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817329334] [2022-09-20 22:59:53,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817329334] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 22:59:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197082226] [2022-09-20 22:59:53,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 22:59:53,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:53,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:59:53,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 22:59:53,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 22:59:53,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 22:59:53,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 22:59:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2022-09-20 22:59:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 22:59:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:54,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 22:59:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:59:54,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197082226] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 22:59:54,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 22:59:54,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-09-20 22:59:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311525430] [2022-09-20 22:59:54,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 22:59:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-09-20 22:59:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:59:54,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-09-20 22:59:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-09-20 22:59:54,189 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 105 [2022-09-20 22:59:54,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 338 transitions, 4348 flow. Second operand has 16 states, 16 states have (on average 77.625) internal successors, (1242), 16 states have internal predecessors, (1242), 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) [2022-09-20 22:59:54,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:59:54,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 105 [2022-09-20 22:59:54,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:59:55,845 INFO L130 PetriNetUnfolder]: 2455/6260 cut-off events. [2022-09-20 22:59:55,845 INFO L131 PetriNetUnfolder]: For 115362/116906 co-relation queries the response was YES. [2022-09-20 22:59:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39898 conditions, 6260 events. 2455/6260 cut-off events. For 115362/116906 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61231 event pairs, 214 based on Foata normal form. 977/7049 useless extension candidates. Maximal degree in co-relation 39833. Up to 1048 conditions per place. [2022-09-20 22:59:55,908 INFO L137 encePairwiseOnDemand]: 92/105 looper letters, 0 selfloop transitions, 0 changer transitions 523/523 dead transitions. [2022-09-20 22:59:55,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 523 transitions, 8301 flow [2022-09-20 22:59:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-09-20 22:59:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-09-20 22:59:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2159 transitions. [2022-09-20 22:59:55,915 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7615520282186948 [2022-09-20 22:59:55,915 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2159 transitions. [2022-09-20 22:59:55,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2159 transitions. [2022-09-20 22:59:55,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:59:55,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2159 transitions. [2022-09-20 22:59:55,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 79.96296296296296) internal successors, (2159), 27 states have internal predecessors, (2159), 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) [2022-09-20 22:59:55,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 105.0) internal successors, (2940), 28 states have internal predecessors, (2940), 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) [2022-09-20 22:59:55,924 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 105.0) internal successors, (2940), 28 states have internal predecessors, (2940), 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) [2022-09-20 22:59:55,924 INFO L175 Difference]: Start difference. First operand has 223 places, 338 transitions, 4348 flow. Second operand 27 states and 2159 transitions. [2022-09-20 22:59:55,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 523 transitions, 8301 flow [2022-09-20 22:59:56,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 523 transitions, 7690 flow, removed 255 selfloop flow, removed 18 redundant places. [2022-09-20 22:59:56,478 INFO L231 Difference]: Finished difference. Result has 213 places, 0 transitions, 0 flow [2022-09-20 22:59:56,479 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=0, PETRI_PLACES=213, PETRI_TRANSITIONS=0} [2022-09-20 22:59:56,479 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 119 predicate places. [2022-09-20 22:59:56,479 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 0 transitions, 0 flow [2022-09-20 22:59:56,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.625) internal successors, (1242), 16 states have internal predecessors, (1242), 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) [2022-09-20 22:59:56,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-09-20 22:59:56,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-09-20 22:59:56,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-09-20 22:59:56,483 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-09-20 22:59:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 22:59:56,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 22:59:56,702 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 1] [2022-09-20 22:59:56,705 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 22:59:56,705 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 22:59:56,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 10:59:56 BasicIcfg [2022-09-20 22:59:56,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 22:59:56,712 INFO L158 Benchmark]: Toolchain (without parser) took 16786.36ms. Allocated memory was 199.2MB in the beginning and 3.3GB in the end (delta: 3.1GB). Free memory was 170.9MB in the beginning and 2.7GB in the end (delta: -2.5GB). Peak memory consumption was 547.5MB. Max. memory is 8.0GB. [2022-09-20 22:59:56,712 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 199.2MB. Free memory was 156.5MB in the beginning and 156.4MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 22:59:56,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.51ms. Allocated memory was 199.2MB in the beginning and 312.5MB in the end (delta: 113.2MB). Free memory was 170.5MB in the beginning and 283.2MB in the end (delta: -112.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-09-20 22:59:56,712 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.56ms. Allocated memory is still 312.5MB. Free memory was 283.2MB in the beginning and 281.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 22:59:56,712 INFO L158 Benchmark]: Boogie Preprocessor took 21.78ms. Allocated memory is still 312.5MB. Free memory was 281.7MB in the beginning and 280.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 22:59:56,713 INFO L158 Benchmark]: RCFGBuilder took 315.58ms. Allocated memory is still 312.5MB. Free memory was 280.6MB in the beginning and 265.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-09-20 22:59:56,713 INFO L158 Benchmark]: TraceAbstraction took 16162.18ms. Allocated memory was 312.5MB in the beginning and 3.3GB in the end (delta: 2.9GB). Free memory was 265.4MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 529.3MB. Max. memory is 8.0GB. [2022-09-20 22:59:56,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 199.2MB. Free memory was 156.5MB in the beginning and 156.4MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.51ms. Allocated memory was 199.2MB in the beginning and 312.5MB in the end (delta: 113.2MB). Free memory was 170.5MB in the beginning and 283.2MB in the end (delta: -112.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.56ms. Allocated memory is still 312.5MB. Free memory was 283.2MB in the beginning and 281.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.78ms. Allocated memory is still 312.5MB. Free memory was 281.7MB in the beginning and 280.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 315.58ms. Allocated memory is still 312.5MB. Free memory was 280.6MB in the beginning and 265.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 16162.18ms. Allocated memory was 312.5MB in the beginning and 3.3GB in the end (delta: 2.9GB). Free memory was 265.4MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 529.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 116]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 126 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.0s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 956 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 956 mSDsluCounter, 747 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1104 mSDsCounter, 359 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2733 IncrementalHoareTripleChecker+Invalid, 3092 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 359 mSolverCounterUnsat, 182 mSDtfsCounter, 2733 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1387 GetRequests, 1171 SyntacticMatches, 27 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4348occurred in iteration=14, InterpolantAutomatonStates: 176, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 1826 NumberOfCodeBlocks, 1826 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 2398 ConstructedInterpolants, 0 QuantifiedInterpolants, 6254 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1505 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 29 InterpolantComputations, 8 PerfectInterpolantSequences, 95/184 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-09-20 22:59:56,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...