/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-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix027_power.oepc_pso.oepc_rmo.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:57:30,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:57:30,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:57:30,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:57:30,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:57:30,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:57:30,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:57:30,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:57:30,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:57:30,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:57:30,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:57:30,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:57:30,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:57:30,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:57:30,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:57:30,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:57:30,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:57:30,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:57:30,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:57:30,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:57:30,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:57:30,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:57:30,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:57:30,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:57:30,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 22:57:30,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 22:57:30,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 22:57:30,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 22:57:30,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 22:57:30,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 22:57:30,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:57:30,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:57:30,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:57:30,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:57:30,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:57:30,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:57:30,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:57:30,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:57:30,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:57:30,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:57:30,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:57:30,967 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-RepeatedSemanticLbe.epf [2022-12-05 22:57:31,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:57:31,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:57:31,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:57:31,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:57:31,017 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:57:31,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:57:31,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:57:31,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:57:31,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:57:31,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:57:31,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:57:31,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:57:31,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:57:31,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:57:31,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:57:31,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:57:31,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:57:31,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:57:31,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:57:31,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:57:31,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:57:31,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:57:31,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:57:31,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:57:31,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:57:31,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:57:31,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:57:31,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-05 22:57:31,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:57:31,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:57:31,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:57:31,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:57:31,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:57:31,370 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:57:31,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix027_power.oepc_pso.oepc_rmo.oepc.i [2022-12-05 22:57:32,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:57:32,727 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:57:32,728 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix027_power.oepc_pso.oepc_rmo.oepc.i [2022-12-05 22:57:32,741 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc2cceecc/87080400c55840bf8dacb977bd8e0938/FLAG31b62f34a [2022-12-05 22:57:32,755 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc2cceecc/87080400c55840bf8dacb977bd8e0938 [2022-12-05 22:57:32,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:57:32,758 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:57:32,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:57:32,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:57:32,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:57:32,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:57:32" (1/1) ... [2022-12-05 22:57:32,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b54c164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:32, skipping insertion in model container [2022-12-05 22:57:32,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:57:32" (1/1) ... [2022-12-05 22:57:32,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:57:32,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:57:32,996 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix027_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2022-12-05 22:57:33,163 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,167 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,167 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,187 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,191 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,192 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,214 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,229 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:57:33,238 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:57:33,249 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix027_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2022-12-05 22:57:33,278 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,279 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,282 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,282 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,282 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,288 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,288 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,288 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,295 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,296 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,296 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,299 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,299 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,302 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,302 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,304 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,304 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,315 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:57:33,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:57:33,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:57:33,353 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:57:33,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33 WrapperNode [2022-12-05 22:57:33,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:57:33,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:57:33,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:57:33,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:57:33,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,412 INFO L138 Inliner]: procedures = 177, calls = 69, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 144 [2022-12-05 22:57:33,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:57:33,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:57:33,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:57:33,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:57:33,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:57:33,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:57:33,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:57:33,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:57:33,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (1/1) ... [2022-12-05 22:57:33,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:57:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:57:33,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 22:57:33,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 22:57:33,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:57:33,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-12-05 22:57:33,512 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-12-05 22:57:33,512 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-12-05 22:57:33,512 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-12-05 22:57:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2022-12-05 22:57:33,513 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2022-12-05 22:57:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:57:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:57:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:57:33,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:57:33,514 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 22:57:33,644 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:57:33,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:57:34,001 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:57:34,153 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:57:34,153 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-05 22:57:34,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:57:34 BoogieIcfgContainer [2022-12-05 22:57:34,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:57:34,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:57:34,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:57:34,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:57:34,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:57:32" (1/3) ... [2022-12-05 22:57:34,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e8784c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:57:34, skipping insertion in model container [2022-12-05 22:57:34,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:57:33" (2/3) ... [2022-12-05 22:57:34,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e8784c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:57:34, skipping insertion in model container [2022-12-05 22:57:34,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:57:34" (3/3) ... [2022-12-05 22:57:34,165 INFO L112 eAbstractionObserver]: Analyzing ICFG mix027_power.oepc_pso.oepc_rmo.oepc.i [2022-12-05 22:57:34,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:57:34,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-05 22:57:34,180 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:57:34,253 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 22:57:34,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 130 transitions, 280 flow [2022-12-05 22:57:34,358 INFO L130 PetriNetUnfolder]: 2/126 cut-off events. [2022-12-05 22:57:34,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:57:34,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 126 events. 2/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-12-05 22:57:34,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 130 transitions, 280 flow [2022-12-05 22:57:34,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 126 transitions, 264 flow [2022-12-05 22:57:34,373 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:34,392 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 126 transitions, 264 flow [2022-12-05 22:57:34,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 126 transitions, 264 flow [2022-12-05 22:57:34,438 INFO L130 PetriNetUnfolder]: 2/126 cut-off events. [2022-12-05 22:57:34,439 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:57:34,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 126 events. 2/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-12-05 22:57:34,451 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 126 transitions, 264 flow [2022-12-05 22:57:34,451 INFO L188 LiptonReduction]: Number of co-enabled transitions 3164 [2022-12-05 22:57:39,197 INFO L203 LiptonReduction]: Total number of compositions: 96 [2022-12-05 22:57:39,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:57:39,215 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=REPEATED_LIPTON_PN, 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;@55d41e51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:57:39,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-05 22:57:39,217 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-05 22:57:39,217 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:57:39,217 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:39,217 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-05 22:57:39,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash 537909, now seen corresponding path program 1 times [2022-12-05 22:57:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:39,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727754893] [2022-12-05 22:57:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:39,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:39,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727754893] [2022-12-05 22:57:39,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727754893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:39,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:39,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 22:57:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715053694] [2022-12-05 22:57:39,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:39,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:57:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:39,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:57:39,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:57:39,608 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2022-12-05 22:57:39,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:39,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:39,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2022-12-05 22:57:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:40,726 INFO L130 PetriNetUnfolder]: 6050/8520 cut-off events. [2022-12-05 22:57:40,726 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-05 22:57:40,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16919 conditions, 8520 events. 6050/8520 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 46663 event pairs, 1682 based on Foata normal form. 0/7765 useless extension candidates. Maximal degree in co-relation 16907. Up to 6574 conditions per place. [2022-12-05 22:57:40,770 INFO L137 encePairwiseOnDemand]: 31/36 looper letters, 41 selfloop transitions, 2 changer transitions 10/57 dead transitions. [2022-12-05 22:57:40,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 241 flow [2022-12-05 22:57:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:57:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:57:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2022-12-05 22:57:40,779 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2022-12-05 22:57:40,781 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 84 flow. Second operand 3 states and 70 transitions. [2022-12-05 22:57:40,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 241 flow [2022-12-05 22:57:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 22:57:40,786 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 68 flow [2022-12-05 22:57:40,788 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2022-12-05 22:57:40,791 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2022-12-05 22:57:40,791 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:40,791 INFO L89 Accepts]: Start accepts. Operand has 44 places, 28 transitions, 68 flow [2022-12-05 22:57:40,793 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:40,794 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:40,794 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 28 transitions, 68 flow [2022-12-05 22:57:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 28 transitions, 68 flow [2022-12-05 22:57:40,800 INFO L130 PetriNetUnfolder]: 0/28 cut-off events. [2022-12-05 22:57:40,800 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 22:57:40,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-12-05 22:57:40,801 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 28 transitions, 68 flow [2022-12-05 22:57:40,801 INFO L188 LiptonReduction]: Number of co-enabled transitions 414 [2022-12-05 22:57:40,896 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:40,898 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 107 [2022-12-05 22:57:40,898 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 68 flow [2022-12-05 22:57:40,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:40,898 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:40,898 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:40,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:57:40,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1640774994, now seen corresponding path program 1 times [2022-12-05 22:57:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375888896] [2022-12-05 22:57:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:41,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:41,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375888896] [2022-12-05 22:57:41,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375888896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:41,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:41,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 22:57:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158828276] [2022-12-05 22:57:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:41,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:57:41,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:57:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:57:41,161 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-05 22:57:41,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 68 flow. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:41,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:41,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-05 22:57:41,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:43,354 INFO L130 PetriNetUnfolder]: 16407/22321 cut-off events. [2022-12-05 22:57:43,354 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2022-12-05 22:57:43,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46179 conditions, 22321 events. 16407/22321 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 117912 event pairs, 5637 based on Foata normal form. 634/22955 useless extension candidates. Maximal degree in co-relation 46169. Up to 13398 conditions per place. [2022-12-05 22:57:43,473 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 43 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2022-12-05 22:57:43,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 222 flow [2022-12-05 22:57:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:57:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:57:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2022-12-05 22:57:43,477 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2022-12-05 22:57:43,477 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 68 flow. Second operand 3 states and 52 transitions. [2022-12-05 22:57:43,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 222 flow [2022-12-05 22:57:43,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 22:57:43,480 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 126 flow [2022-12-05 22:57:43,480 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-12-05 22:57:43,480 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-12-05 22:57:43,481 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:43,481 INFO L89 Accepts]: Start accepts. Operand has 41 places, 35 transitions, 126 flow [2022-12-05 22:57:43,483 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:43,483 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:43,483 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 35 transitions, 126 flow [2022-12-05 22:57:43,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 126 flow [2022-12-05 22:57:43,540 INFO L130 PetriNetUnfolder]: 241/622 cut-off events. [2022-12-05 22:57:43,541 INFO L131 PetriNetUnfolder]: For 82/95 co-relation queries the response was YES. [2022-12-05 22:57:43,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 622 events. 241/622 cut-off events. For 82/95 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4093 event pairs, 101 based on Foata normal form. 0/603 useless extension candidates. Maximal degree in co-relation 1210. Up to 263 conditions per place. [2022-12-05 22:57:43,548 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 35 transitions, 126 flow [2022-12-05 22:57:43,548 INFO L188 LiptonReduction]: Number of co-enabled transitions 522 [2022-12-05 22:57:43,609 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:43,611 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 130 [2022-12-05 22:57:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 126 flow [2022-12-05 22:57:43,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:43,612 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:43,612 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:57:43,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash -675583943, now seen corresponding path program 1 times [2022-12-05 22:57:43,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921630130] [2022-12-05 22:57:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:43,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921630130] [2022-12-05 22:57:43,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921630130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:43,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:43,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:57:43,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102335776] [2022-12-05 22:57:43,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:43,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:57:43,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:57:43,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:57:43,807 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-05 22:57:43,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 126 flow. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:43,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:43,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-05 22:57:43,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:45,791 INFO L130 PetriNetUnfolder]: 16149/21975 cut-off events. [2022-12-05 22:57:45,792 INFO L131 PetriNetUnfolder]: For 8461/8461 co-relation queries the response was YES. [2022-12-05 22:57:45,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55465 conditions, 21975 events. 16149/21975 cut-off events. For 8461/8461 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 114932 event pairs, 1334 based on Foata normal form. 40/22015 useless extension candidates. Maximal degree in co-relation 55453. Up to 12464 conditions per place. [2022-12-05 22:57:45,899 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 56 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2022-12-05 22:57:45,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 360 flow [2022-12-05 22:57:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:57:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:57:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2022-12-05 22:57:45,902 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2022-12-05 22:57:45,902 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 126 flow. Second operand 4 states and 65 transitions. [2022-12-05 22:57:45,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 360 flow [2022-12-05 22:57:45,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 22:57:45,962 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 198 flow [2022-12-05 22:57:45,962 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-12-05 22:57:45,963 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-12-05 22:57:45,963 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:45,963 INFO L89 Accepts]: Start accepts. Operand has 45 places, 42 transitions, 198 flow [2022-12-05 22:57:45,965 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:45,965 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:45,965 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 42 transitions, 198 flow [2022-12-05 22:57:45,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 198 flow [2022-12-05 22:57:46,010 INFO L130 PetriNetUnfolder]: 223/574 cut-off events. [2022-12-05 22:57:46,010 INFO L131 PetriNetUnfolder]: For 428/507 co-relation queries the response was YES. [2022-12-05 22:57:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 574 events. 223/574 cut-off events. For 428/507 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3712 event pairs, 75 based on Foata normal form. 1/561 useless extension candidates. Maximal degree in co-relation 1375. Up to 247 conditions per place. [2022-12-05 22:57:46,016 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 42 transitions, 198 flow [2022-12-05 22:57:46,016 INFO L188 LiptonReduction]: Number of co-enabled transitions 620 [2022-12-05 22:57:46,049 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:46,050 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 87 [2022-12-05 22:57:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 198 flow [2022-12-05 22:57:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:46,050 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:46,050 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 22:57:46,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -675583695, now seen corresponding path program 1 times [2022-12-05 22:57:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35252401] [2022-12-05 22:57:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:46,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35252401] [2022-12-05 22:57:46,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35252401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:46,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:46,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:57:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677646172] [2022-12-05 22:57:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:46,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:57:46,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:57:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:57:46,188 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-05 22:57:46,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 198 flow. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:46,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:46,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-05 22:57:46,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:47,845 INFO L130 PetriNetUnfolder]: 15821/21537 cut-off events. [2022-12-05 22:57:47,846 INFO L131 PetriNetUnfolder]: For 17550/17550 co-relation queries the response was YES. [2022-12-05 22:57:47,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59029 conditions, 21537 events. 15821/21537 cut-off events. For 17550/17550 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 113226 event pairs, 3113 based on Foata normal form. 50/21587 useless extension candidates. Maximal degree in co-relation 59014. Up to 12454 conditions per place. [2022-12-05 22:57:47,948 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 67 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2022-12-05 22:57:47,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 85 transitions, 524 flow [2022-12-05 22:57:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:57:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:57:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2022-12-05 22:57:47,950 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2022-12-05 22:57:47,950 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 198 flow. Second operand 4 states and 72 transitions. [2022-12-05 22:57:47,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 85 transitions, 524 flow [2022-12-05 22:57:48,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 85 transitions, 524 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:57:48,009 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 356 flow [2022-12-05 22:57:48,009 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2022-12-05 22:57:48,010 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2022-12-05 22:57:48,010 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:48,010 INFO L89 Accepts]: Start accepts. Operand has 51 places, 52 transitions, 356 flow [2022-12-05 22:57:48,011 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:48,012 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:48,012 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 52 transitions, 356 flow [2022-12-05 22:57:48,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 52 transitions, 356 flow [2022-12-05 22:57:48,054 INFO L130 PetriNetUnfolder]: 194/527 cut-off events. [2022-12-05 22:57:48,054 INFO L131 PetriNetUnfolder]: For 951/1098 co-relation queries the response was YES. [2022-12-05 22:57:48,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 527 events. 194/527 cut-off events. For 951/1098 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3356 event pairs, 45 based on Foata normal form. 2/518 useless extension candidates. Maximal degree in co-relation 1625. Up to 221 conditions per place. [2022-12-05 22:57:48,059 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 52 transitions, 356 flow [2022-12-05 22:57:48,060 INFO L188 LiptonReduction]: Number of co-enabled transitions 740 [2022-12-05 22:57:48,065 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:48,070 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 60 [2022-12-05 22:57:48,071 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 356 flow [2022-12-05 22:57:48,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:48,071 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:48,071 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:48,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 22:57:48,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:48,072 INFO L85 PathProgramCache]: Analyzing trace with hash 531733290, now seen corresponding path program 1 times [2022-12-05 22:57:48,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:48,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355683674] [2022-12-05 22:57:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:48,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:48,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355683674] [2022-12-05 22:57:48,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355683674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:48,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:48,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:57:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72859487] [2022-12-05 22:57:48,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:57:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:57:48,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:57:48,210 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-05 22:57:48,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 356 flow. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:48,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:48,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-05 22:57:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:50,032 INFO L130 PetriNetUnfolder]: 14954/20366 cut-off events. [2022-12-05 22:57:50,032 INFO L131 PetriNetUnfolder]: For 41834/41834 co-relation queries the response was YES. [2022-12-05 22:57:50,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63084 conditions, 20366 events. 14954/20366 cut-off events. For 41834/41834 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 103637 event pairs, 3864 based on Foata normal form. 175/20541 useless extension candidates. Maximal degree in co-relation 63064. Up to 8569 conditions per place. [2022-12-05 22:57:50,106 INFO L137 encePairwiseOnDemand]: 20/28 looper letters, 74 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2022-12-05 22:57:50,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 694 flow [2022-12-05 22:57:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:57:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:57:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2022-12-05 22:57:50,107 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2022-12-05 22:57:50,107 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 356 flow. Second operand 4 states and 60 transitions. [2022-12-05 22:57:50,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 694 flow [2022-12-05 22:57:50,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 694 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 22:57:50,153 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 506 flow [2022-12-05 22:57:50,153 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2022-12-05 22:57:50,154 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2022-12-05 22:57:50,154 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:50,154 INFO L89 Accepts]: Start accepts. Operand has 57 places, 59 transitions, 506 flow [2022-12-05 22:57:50,155 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:50,155 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:50,155 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 59 transitions, 506 flow [2022-12-05 22:57:50,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 59 transitions, 506 flow [2022-12-05 22:57:50,191 INFO L130 PetriNetUnfolder]: 152/418 cut-off events. [2022-12-05 22:57:50,191 INFO L131 PetriNetUnfolder]: For 1375/1465 co-relation queries the response was YES. [2022-12-05 22:57:50,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 418 events. 152/418 cut-off events. For 1375/1465 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2448 event pairs, 31 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 1555. Up to 171 conditions per place. [2022-12-05 22:57:50,196 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 59 transitions, 506 flow [2022-12-05 22:57:50,196 INFO L188 LiptonReduction]: Number of co-enabled transitions 824 [2022-12-05 22:57:50,200 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:50,201 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 47 [2022-12-05 22:57:50,201 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 506 flow [2022-12-05 22:57:50,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:50,201 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:50,202 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:50,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 22:57:50,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash 912632813, now seen corresponding path program 1 times [2022-12-05 22:57:50,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88582306] [2022-12-05 22:57:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:50,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:50,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:50,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88582306] [2022-12-05 22:57:50,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88582306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:50,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:50,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:57:50,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413234728] [2022-12-05 22:57:50,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:50,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:57:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:57:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:57:50,360 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-05 22:57:50,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:50,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:50,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-05 22:57:50,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:51,763 INFO L130 PetriNetUnfolder]: 9272/13711 cut-off events. [2022-12-05 22:57:51,764 INFO L131 PetriNetUnfolder]: For 35195/37452 co-relation queries the response was YES. [2022-12-05 22:57:51,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40935 conditions, 13711 events. 9272/13711 cut-off events. For 35195/37452 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 85991 event pairs, 1507 based on Foata normal form. 1452/14827 useless extension candidates. Maximal degree in co-relation 40910. Up to 8354 conditions per place. [2022-12-05 22:57:51,839 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 112 selfloop transitions, 10 changer transitions 0/143 dead transitions. [2022-12-05 22:57:51,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 143 transitions, 1348 flow [2022-12-05 22:57:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:57:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:57:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2022-12-05 22:57:51,843 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2022-12-05 22:57:51,843 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 506 flow. Second operand 5 states and 92 transitions. [2022-12-05 22:57:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 143 transitions, 1348 flow [2022-12-05 22:57:51,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 143 transitions, 1344 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:57:51,878 INFO L231 Difference]: Finished difference. Result has 63 places, 68 transitions, 577 flow [2022-12-05 22:57:51,878 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2022-12-05 22:57:51,881 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2022-12-05 22:57:51,881 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:51,882 INFO L89 Accepts]: Start accepts. Operand has 63 places, 68 transitions, 577 flow [2022-12-05 22:57:51,883 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:51,883 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:51,883 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 68 transitions, 577 flow [2022-12-05 22:57:51,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 68 transitions, 577 flow [2022-12-05 22:57:51,979 INFO L130 PetriNetUnfolder]: 801/1665 cut-off events. [2022-12-05 22:57:51,980 INFO L131 PetriNetUnfolder]: For 2985/3561 co-relation queries the response was YES. [2022-12-05 22:57:51,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5479 conditions, 1665 events. 801/1665 cut-off events. For 2985/3561 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 13207 event pairs, 333 based on Foata normal form. 16/1506 useless extension candidates. Maximal degree in co-relation 5453. Up to 986 conditions per place. [2022-12-05 22:57:51,996 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 68 transitions, 577 flow [2022-12-05 22:57:51,997 INFO L188 LiptonReduction]: Number of co-enabled transitions 1246 [2022-12-05 22:57:52,449 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-05 22:57:52,450 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 569 [2022-12-05 22:57:52,450 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 571 flow [2022-12-05 22:57:52,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:52,451 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:52,451 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 22:57:52,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2035386528, now seen corresponding path program 1 times [2022-12-05 22:57:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862362593] [2022-12-05 22:57:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862362593] [2022-12-05 22:57:52,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862362593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:52,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:52,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 22:57:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782295209] [2022-12-05 22:57:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:52,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 22:57:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 22:57:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 22:57:52,616 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-05 22:57:52,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 571 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:52,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:52,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-05 22:57:52,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:53,486 INFO L130 PetriNetUnfolder]: 4995/7768 cut-off events. [2022-12-05 22:57:53,486 INFO L131 PetriNetUnfolder]: For 21087/22134 co-relation queries the response was YES. [2022-12-05 22:57:53,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27818 conditions, 7768 events. 4995/7768 cut-off events. For 21087/22134 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 47813 event pairs, 787 based on Foata normal form. 887/8458 useless extension candidates. Maximal degree in co-relation 27789. Up to 2576 conditions per place. [2022-12-05 22:57:53,548 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 127 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2022-12-05 22:57:53,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 162 transitions, 1551 flow [2022-12-05 22:57:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:57:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:57:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2022-12-05 22:57:53,550 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2022-12-05 22:57:53,550 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 571 flow. Second operand 6 states and 113 transitions. [2022-12-05 22:57:53,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 162 transitions, 1551 flow [2022-12-05 22:57:53,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 162 transitions, 1544 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 22:57:53,605 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 660 flow [2022-12-05 22:57:53,605 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2022-12-05 22:57:53,606 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2022-12-05 22:57:53,606 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:53,606 INFO L89 Accepts]: Start accepts. Operand has 67 places, 72 transitions, 660 flow [2022-12-05 22:57:53,607 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:53,607 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:53,608 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 72 transitions, 660 flow [2022-12-05 22:57:53,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 72 transitions, 660 flow [2022-12-05 22:57:53,698 INFO L130 PetriNetUnfolder]: 481/1131 cut-off events. [2022-12-05 22:57:53,698 INFO L131 PetriNetUnfolder]: For 3432/4280 co-relation queries the response was YES. [2022-12-05 22:57:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4985 conditions, 1131 events. 481/1131 cut-off events. For 3432/4280 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 8373 event pairs, 88 based on Foata normal form. 35/1108 useless extension candidates. Maximal degree in co-relation 4956. Up to 706 conditions per place. [2022-12-05 22:57:53,711 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 72 transitions, 660 flow [2022-12-05 22:57:53,711 INFO L188 LiptonReduction]: Number of co-enabled transitions 1318 [2022-12-05 22:57:54,079 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-05 22:57:54,080 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 474 [2022-12-05 22:57:54,080 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 652 flow [2022-12-05 22:57:54,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:54,080 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:54,080 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:54,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 22:57:54,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash -483740757, now seen corresponding path program 1 times [2022-12-05 22:57:54,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:54,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320396422] [2022-12-05 22:57:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:54,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:54,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320396422] [2022-12-05 22:57:54,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320396422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:54,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:54,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:57:54,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386487793] [2022-12-05 22:57:54,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:54,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:57:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:57:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:57:54,333 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 28 [2022-12-05 22:57:54,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 652 flow. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:54,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:54,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 28 [2022-12-05 22:57:54,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:55,285 INFO L130 PetriNetUnfolder]: 7220/10784 cut-off events. [2022-12-05 22:57:55,285 INFO L131 PetriNetUnfolder]: For 44731/44731 co-relation queries the response was YES. [2022-12-05 22:57:55,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46038 conditions, 10784 events. 7220/10784 cut-off events. For 44731/44731 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 60216 event pairs, 1822 based on Foata normal form. 76/10860 useless extension candidates. Maximal degree in co-relation 46006. Up to 4896 conditions per place. [2022-12-05 22:57:55,339 INFO L137 encePairwiseOnDemand]: 19/28 looper letters, 93 selfloop transitions, 27 changer transitions 10/130 dead transitions. [2022-12-05 22:57:55,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 130 transitions, 1312 flow [2022-12-05 22:57:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:57:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:57:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2022-12-05 22:57:55,340 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2022-12-05 22:57:55,340 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 652 flow. Second operand 4 states and 75 transitions. [2022-12-05 22:57:55,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 130 transitions, 1312 flow [2022-12-05 22:57:55,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 130 transitions, 1202 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-12-05 22:57:55,526 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 751 flow [2022-12-05 22:57:55,526 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=751, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2022-12-05 22:57:55,527 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2022-12-05 22:57:55,527 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:55,527 INFO L89 Accepts]: Start accepts. Operand has 67 places, 70 transitions, 751 flow [2022-12-05 22:57:55,528 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:55,528 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:55,529 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 70 transitions, 751 flow [2022-12-05 22:57:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 70 transitions, 751 flow [2022-12-05 22:57:55,611 INFO L130 PetriNetUnfolder]: 506/1173 cut-off events. [2022-12-05 22:57:55,611 INFO L131 PetriNetUnfolder]: For 3148/3350 co-relation queries the response was YES. [2022-12-05 22:57:55,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 1173 events. 506/1173 cut-off events. For 3148/3350 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 8513 event pairs, 124 based on Foata normal form. 45/1162 useless extension candidates. Maximal degree in co-relation 4223. Up to 647 conditions per place. [2022-12-05 22:57:55,620 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 70 transitions, 751 flow [2022-12-05 22:57:55,620 INFO L188 LiptonReduction]: Number of co-enabled transitions 1136 [2022-12-05 22:57:55,626 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:55,627 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 100 [2022-12-05 22:57:55,627 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 751 flow [2022-12-05 22:57:55,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:55,627 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:55,627 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:55,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 22:57:55,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1490611795, now seen corresponding path program 1 times [2022-12-05 22:57:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:55,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938260089] [2022-12-05 22:57:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:55,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:55,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:55,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938260089] [2022-12-05 22:57:55,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938260089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:55,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:55,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 22:57:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655340777] [2022-12-05 22:57:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:55,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 22:57:55,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 22:57:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 22:57:55,860 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-05 22:57:55,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 751 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:55,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:55,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-05 22:57:55,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:56,544 INFO L130 PetriNetUnfolder]: 3947/6318 cut-off events. [2022-12-05 22:57:56,544 INFO L131 PetriNetUnfolder]: For 23669/24328 co-relation queries the response was YES. [2022-12-05 22:57:56,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23597 conditions, 6318 events. 3947/6318 cut-off events. For 23669/24328 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 39487 event pairs, 800 based on Foata normal form. 475/6625 useless extension candidates. Maximal degree in co-relation 23564. Up to 2137 conditions per place. [2022-12-05 22:57:56,572 INFO L137 encePairwiseOnDemand]: 21/28 looper letters, 126 selfloop transitions, 18 changer transitions 16/182 dead transitions. [2022-12-05 22:57:56,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 182 transitions, 2047 flow [2022-12-05 22:57:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:57:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:57:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2022-12-05 22:57:56,573 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2022-12-05 22:57:56,573 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 751 flow. Second operand 7 states and 132 transitions. [2022-12-05 22:57:56,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 182 transitions, 2047 flow [2022-12-05 22:57:56,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 182 transitions, 1968 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-05 22:57:56,601 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 858 flow [2022-12-05 22:57:56,601 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=858, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2022-12-05 22:57:56,601 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2022-12-05 22:57:56,602 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:56,602 INFO L89 Accepts]: Start accepts. Operand has 75 places, 79 transitions, 858 flow [2022-12-05 22:57:56,603 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:56,603 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:56,603 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 79 transitions, 858 flow [2022-12-05 22:57:56,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 858 flow [2022-12-05 22:57:56,676 INFO L130 PetriNetUnfolder]: 347/898 cut-off events. [2022-12-05 22:57:56,677 INFO L131 PetriNetUnfolder]: For 3160/3384 co-relation queries the response was YES. [2022-12-05 22:57:56,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 898 events. 347/898 cut-off events. For 3160/3384 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6475 event pairs, 28 based on Foata normal form. 4/865 useless extension candidates. Maximal degree in co-relation 4121. Up to 520 conditions per place. [2022-12-05 22:57:56,685 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 79 transitions, 858 flow [2022-12-05 22:57:56,685 INFO L188 LiptonReduction]: Number of co-enabled transitions 1318 [2022-12-05 22:57:56,691 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L871-3-->L2: Formula: (and (= |v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25| (mod v_~main$tmp_guard0~0_16 256)) (= (ite (= (ite (= v_~__unbuffered_cnt~0_57 4) 1 0) 0) 0 1) v_~main$tmp_guard0~0_16)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57} OutVars{ULTIMATE.start_main_#t~pre11#1=|v_ULTIMATE.start_main_#t~pre11#1_17|, ULTIMATE.start_assume_abort_if_not_~cond#1=|v_ULTIMATE.start_assume_abort_if_not_~cond#1_21|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57, ~main$tmp_guard0~0=v_~main$tmp_guard0~0_16, ULTIMATE.start_main_#t~nondet12#1=|v_ULTIMATE.start_main_#t~nondet12#1_11|, ULTIMATE.start_assume_abort_if_not_#in~cond#1=|v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25|} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~pre11#1, ULTIMATE.start_assume_abort_if_not_~cond#1, ~main$tmp_guard0~0, ULTIMATE.start_main_#t~nondet12#1, ULTIMATE.start_assume_abort_if_not_#in~cond#1] and [481] L811-->P2EXIT: Formula: (and (= (+ v_~__unbuffered_cnt~0_94 1) v_~__unbuffered_cnt~0_93) (= |v_P2Thread1of1ForFork2_#res.offset_23| 0) (= |v_P2Thread1of1ForFork2_#res.base_23| 0)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_94} OutVars{P2Thread1of1ForFork2_#res.base=|v_P2Thread1of1ForFork2_#res.base_23|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_93, P2Thread1of1ForFork2_#res.offset=|v_P2Thread1of1ForFork2_#res.offset_23|} AuxVars[] AssignedVars[P2Thread1of1ForFork2_#res.base, ~__unbuffered_cnt~0, P2Thread1of1ForFork2_#res.offset] [2022-12-05 22:57:56,716 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L871-3-->L2: Formula: (and (= |v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25| (mod v_~main$tmp_guard0~0_16 256)) (= (ite (= (ite (= v_~__unbuffered_cnt~0_57 4) 1 0) 0) 0 1) v_~main$tmp_guard0~0_16)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57} OutVars{ULTIMATE.start_main_#t~pre11#1=|v_ULTIMATE.start_main_#t~pre11#1_17|, ULTIMATE.start_assume_abort_if_not_~cond#1=|v_ULTIMATE.start_assume_abort_if_not_~cond#1_21|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57, ~main$tmp_guard0~0=v_~main$tmp_guard0~0_16, ULTIMATE.start_main_#t~nondet12#1=|v_ULTIMATE.start_main_#t~nondet12#1_11|, ULTIMATE.start_assume_abort_if_not_#in~cond#1=|v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25|} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~pre11#1, ULTIMATE.start_assume_abort_if_not_~cond#1, ~main$tmp_guard0~0, ULTIMATE.start_main_#t~nondet12#1, ULTIMATE.start_assume_abort_if_not_#in~cond#1] and [516] L791-->P1EXIT: Formula: (and (= |v_P1Thread1of1ForFork1_#res.base_19| 0) (= |v_P1Thread1of1ForFork1_#res.offset_19| 0) (= v_~__unbuffered_cnt~0_163 (+ v_~__unbuffered_cnt~0_164 1))) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_164} OutVars{P1Thread1of1ForFork1_#res.offset=|v_P1Thread1of1ForFork1_#res.offset_19|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_163, P1Thread1of1ForFork1_#res.base=|v_P1Thread1of1ForFork1_#res.base_19|} AuxVars[] AssignedVars[P1Thread1of1ForFork1_#res.offset, ~__unbuffered_cnt~0, P1Thread1of1ForFork1_#res.base] [2022-12-05 22:57:56,740 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L871-3-->L2: Formula: (and (= |v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25| (mod v_~main$tmp_guard0~0_16 256)) (= (ite (= (ite (= v_~__unbuffered_cnt~0_57 4) 1 0) 0) 0 1) v_~main$tmp_guard0~0_16)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57} OutVars{ULTIMATE.start_main_#t~pre11#1=|v_ULTIMATE.start_main_#t~pre11#1_17|, ULTIMATE.start_assume_abort_if_not_~cond#1=|v_ULTIMATE.start_assume_abort_if_not_~cond#1_21|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57, ~main$tmp_guard0~0=v_~main$tmp_guard0~0_16, ULTIMATE.start_main_#t~nondet12#1=|v_ULTIMATE.start_main_#t~nondet12#1_11|, ULTIMATE.start_assume_abort_if_not_#in~cond#1=|v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25|} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~pre11#1, ULTIMATE.start_assume_abort_if_not_~cond#1, ~main$tmp_guard0~0, ULTIMATE.start_main_#t~nondet12#1, ULTIMATE.start_assume_abort_if_not_#in~cond#1] and [517] L771-->P0EXIT: Formula: (and (= v_~__unbuffered_cnt~0_177 (+ v_~__unbuffered_cnt~0_178 1)) (= |v_P0Thread1of1ForFork3_#res#1.base_7| 0) (= |v_P0Thread1of1ForFork3_#res#1.offset_7| 0)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_178} OutVars{P0Thread1of1ForFork3_#res#1.offset=|v_P0Thread1of1ForFork3_#res#1.offset_7|, P0Thread1of1ForFork3_#res#1.base=|v_P0Thread1of1ForFork3_#res#1.base_7|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_177} AuxVars[] AssignedVars[P0Thread1of1ForFork3_#res#1.offset, P0Thread1of1ForFork3_#res#1.base, ~__unbuffered_cnt~0] [2022-12-05 22:57:56,765 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L871-3-->L2: Formula: (and (= |v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25| (mod v_~main$tmp_guard0~0_16 256)) (= (ite (= (ite (= v_~__unbuffered_cnt~0_57 4) 1 0) 0) 0 1) v_~main$tmp_guard0~0_16)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57} OutVars{ULTIMATE.start_main_#t~pre11#1=|v_ULTIMATE.start_main_#t~pre11#1_17|, ULTIMATE.start_assume_abort_if_not_~cond#1=|v_ULTIMATE.start_assume_abort_if_not_~cond#1_21|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_57, ~main$tmp_guard0~0=v_~main$tmp_guard0~0_16, ULTIMATE.start_main_#t~nondet12#1=|v_ULTIMATE.start_main_#t~nondet12#1_11|, ULTIMATE.start_assume_abort_if_not_#in~cond#1=|v_ULTIMATE.start_assume_abort_if_not_#in~cond#1_25|} AuxVars[] AssignedVars[ULTIMATE.start_main_#t~pre11#1, ULTIMATE.start_assume_abort_if_not_~cond#1, ~main$tmp_guard0~0, ULTIMATE.start_main_#t~nondet12#1, ULTIMATE.start_assume_abort_if_not_#in~cond#1] and [518] L847-->P3EXIT: Formula: (and (= v_~__unbuffered_cnt~0_185 (+ v_~__unbuffered_cnt~0_186 1)) (= |v_P3Thread1of1ForFork0_#res.offset_25| 0) (= |v_P3Thread1of1ForFork0_#res.base_25| 0)) InVars {~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_186} OutVars{P3Thread1of1ForFork0_#res.offset=|v_P3Thread1of1ForFork0_#res.offset_25|, P3Thread1of1ForFork0_#res.base=|v_P3Thread1of1ForFork0_#res.base_25|, ~__unbuffered_cnt~0=v_~__unbuffered_cnt~0_185} AuxVars[] AssignedVars[P3Thread1of1ForFork0_#res.offset, P3Thread1of1ForFork0_#res.base, ~__unbuffered_cnt~0] [2022-12-05 22:57:56,803 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-05 22:57:56,804 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 202 [2022-12-05 22:57:56,804 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 864 flow [2022-12-05 22:57:56,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:56,804 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:56,804 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-05 22:57:56,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1733447269, now seen corresponding path program 1 times [2022-12-05 22:57:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:56,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374354023] [2022-12-05 22:57:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:57,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:57,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374354023] [2022-12-05 22:57:57,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374354023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:57,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:57,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 22:57:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237356053] [2022-12-05 22:57:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:57,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 22:57:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 22:57:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-05 22:57:57,632 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2022-12-05 22:57:57,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:57,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:57,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2022-12-05 22:57:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:57:58,943 INFO L130 PetriNetUnfolder]: 6126/9800 cut-off events. [2022-12-05 22:57:58,943 INFO L131 PetriNetUnfolder]: For 43801/44383 co-relation queries the response was YES. [2022-12-05 22:57:58,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41676 conditions, 9800 events. 6126/9800 cut-off events. For 43801/44383 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 65644 event pairs, 992 based on Foata normal form. 137/9746 useless extension candidates. Maximal degree in co-relation 41639. Up to 4752 conditions per place. [2022-12-05 22:57:59,005 INFO L137 encePairwiseOnDemand]: 24/32 looper letters, 126 selfloop transitions, 13 changer transitions 52/213 dead transitions. [2022-12-05 22:57:59,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 213 transitions, 2490 flow [2022-12-05 22:57:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 22:57:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 22:57:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2022-12-05 22:57:59,007 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2022-12-05 22:57:59,007 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 864 flow. Second operand 7 states and 131 transitions. [2022-12-05 22:57:59,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 213 transitions, 2490 flow [2022-12-05 22:57:59,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 213 transitions, 2173 flow, removed 131 selfloop flow, removed 3 redundant places. [2022-12-05 22:57:59,407 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 935 flow [2022-12-05 22:57:59,407 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=935, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2022-12-05 22:57:59,407 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2022-12-05 22:57:59,407 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:57:59,408 INFO L89 Accepts]: Start accepts. Operand has 80 places, 89 transitions, 935 flow [2022-12-05 22:57:59,409 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:57:59,409 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:57:59,409 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 89 transitions, 935 flow [2022-12-05 22:57:59,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 89 transitions, 935 flow [2022-12-05 22:57:59,543 INFO L130 PetriNetUnfolder]: 974/2086 cut-off events. [2022-12-05 22:57:59,543 INFO L131 PetriNetUnfolder]: For 5904/6012 co-relation queries the response was YES. [2022-12-05 22:57:59,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7961 conditions, 2086 events. 974/2086 cut-off events. For 5904/6012 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15882 event pairs, 67 based on Foata normal form. 18/1956 useless extension candidates. Maximal degree in co-relation 7924. Up to 615 conditions per place. [2022-12-05 22:57:59,565 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 89 transitions, 935 flow [2022-12-05 22:57:59,566 INFO L188 LiptonReduction]: Number of co-enabled transitions 1546 [2022-12-05 22:57:59,582 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-05 22:57:59,583 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 176 [2022-12-05 22:57:59,583 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 935 flow [2022-12-05 22:57:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:59,583 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:57:59,583 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:57:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-05 22:57:59,583 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:57:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:57:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash 145358477, now seen corresponding path program 1 times [2022-12-05 22:57:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:57:59,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848180853] [2022-12-05 22:57:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:57:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:57:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:57:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:57:59,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:57:59,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848180853] [2022-12-05 22:57:59,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848180853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:57:59,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:57:59,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:57:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689442082] [2022-12-05 22:57:59,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:57:59,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:57:59,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:57:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:57:59,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:57:59,740 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 32 [2022-12-05 22:57:59,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 935 flow. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:57:59,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:57:59,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 32 [2022-12-05 22:57:59,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:58:01,264 INFO L130 PetriNetUnfolder]: 9794/14896 cut-off events. [2022-12-05 22:58:01,264 INFO L131 PetriNetUnfolder]: For 69952/69952 co-relation queries the response was YES. [2022-12-05 22:58:01,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67735 conditions, 14896 events. 9794/14896 cut-off events. For 69952/69952 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 92359 event pairs, 1960 based on Foata normal form. 14/14910 useless extension candidates. Maximal degree in co-relation 67695. Up to 7912 conditions per place. [2022-12-05 22:58:01,314 INFO L137 encePairwiseOnDemand]: 23/32 looper letters, 101 selfloop transitions, 20 changer transitions 58/179 dead transitions. [2022-12-05 22:58:01,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 179 transitions, 1953 flow [2022-12-05 22:58:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:58:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:58:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2022-12-05 22:58:01,315 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6484375 [2022-12-05 22:58:01,315 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 935 flow. Second operand 4 states and 83 transitions. [2022-12-05 22:58:01,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 179 transitions, 1953 flow [2022-12-05 22:58:01,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 179 transitions, 1944 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-05 22:58:01,650 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 710 flow [2022-12-05 22:58:01,650 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=710, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2022-12-05 22:58:01,651 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 33 predicate places. [2022-12-05 22:58:01,651 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:58:01,651 INFO L89 Accepts]: Start accepts. Operand has 81 places, 70 transitions, 710 flow [2022-12-05 22:58:01,652 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:58:01,652 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:58:01,652 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 70 transitions, 710 flow [2022-12-05 22:58:01,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 70 transitions, 710 flow [2022-12-05 22:58:01,753 INFO L130 PetriNetUnfolder]: 600/1466 cut-off events. [2022-12-05 22:58:01,753 INFO L131 PetriNetUnfolder]: For 5074/5173 co-relation queries the response was YES. [2022-12-05 22:58:01,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 1466 events. 600/1466 cut-off events. For 5074/5173 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11161 event pairs, 65 based on Foata normal form. 10/1361 useless extension candidates. Maximal degree in co-relation 5467. Up to 504 conditions per place. [2022-12-05 22:58:01,766 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 70 transitions, 710 flow [2022-12-05 22:58:01,767 INFO L188 LiptonReduction]: Number of co-enabled transitions 1022 [2022-12-05 22:58:01,877 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-05 22:58:01,878 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 227 [2022-12-05 22:58:01,878 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 716 flow [2022-12-05 22:58:01,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:58:01,879 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:58:01,879 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:58:01,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-05 22:58:01,879 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:58:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:58:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1799700535, now seen corresponding path program 2 times [2022-12-05 22:58:01,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:58:01,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382094050] [2022-12-05 22:58:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:58:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:58:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:58:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:58:02,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:58:02,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382094050] [2022-12-05 22:58:02,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382094050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:58:02,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:58:02,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 22:58:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715891512] [2022-12-05 22:58:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:58:02,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 22:58:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:58:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 22:58:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-05 22:58:02,093 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2022-12-05 22:58:02,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 716 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:58:02,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:58:02,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2022-12-05 22:58:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:58:02,748 INFO L130 PetriNetUnfolder]: 3744/6141 cut-off events. [2022-12-05 22:58:02,748 INFO L131 PetriNetUnfolder]: For 25354/25779 co-relation queries the response was YES. [2022-12-05 22:58:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25848 conditions, 6141 events. 3744/6141 cut-off events. For 25354/25779 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40181 event pairs, 660 based on Foata normal form. 223/6221 useless extension candidates. Maximal degree in co-relation 25806. Up to 2447 conditions per place. [2022-12-05 22:58:02,793 INFO L137 encePairwiseOnDemand]: 21/29 looper letters, 106 selfloop transitions, 18 changer transitions 35/168 dead transitions. [2022-12-05 22:58:02,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 168 transitions, 1889 flow [2022-12-05 22:58:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 22:58:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 22:58:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2022-12-05 22:58:02,794 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2022-12-05 22:58:02,794 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 716 flow. Second operand 8 states and 124 transitions. [2022-12-05 22:58:02,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 168 transitions, 1889 flow [2022-12-05 22:58:02,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 168 transitions, 1746 flow, removed 21 selfloop flow, removed 6 redundant places. [2022-12-05 22:58:02,971 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 588 flow [2022-12-05 22:58:02,971 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=588, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2022-12-05 22:58:02,971 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2022-12-05 22:58:02,971 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:58:02,971 INFO L89 Accepts]: Start accepts. Operand has 84 places, 62 transitions, 588 flow [2022-12-05 22:58:02,973 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:58:02,973 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:58:02,973 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 62 transitions, 588 flow [2022-12-05 22:58:02,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 62 transitions, 588 flow [2022-12-05 22:58:03,003 INFO L130 PetriNetUnfolder]: 191/466 cut-off events. [2022-12-05 22:58:03,004 INFO L131 PetriNetUnfolder]: For 1346/1459 co-relation queries the response was YES. [2022-12-05 22:58:03,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 466 events. 191/466 cut-off events. For 1346/1459 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2691 event pairs, 15 based on Foata normal form. 7/432 useless extension candidates. Maximal degree in co-relation 1960. Up to 161 conditions per place. [2022-12-05 22:58:03,007 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 62 transitions, 588 flow [2022-12-05 22:58:03,008 INFO L188 LiptonReduction]: Number of co-enabled transitions 732 [2022-12-05 22:58:03,035 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [378] L761-->L764: Formula: (= v_~x~0_1 1) InVars {} OutVars{~x~0=v_~x~0_1} AuxVars[] AssignedVars[~x~0] and [445] $Ultimate##0-->L781: Formula: (and (= |v_P1Thread1of1ForFork1_#in~arg.offset_5| v_P1Thread1of1ForFork1_~arg.offset_5) (= v_~x~0_19 2) (= v_P1Thread1of1ForFork1_~arg.base_5 |v_P1Thread1of1ForFork1_#in~arg.base_5|)) InVars {P1Thread1of1ForFork1_#in~arg.base=|v_P1Thread1of1ForFork1_#in~arg.base_5|, P1Thread1of1ForFork1_#in~arg.offset=|v_P1Thread1of1ForFork1_#in~arg.offset_5|} OutVars{P1Thread1of1ForFork1_~arg.offset=v_P1Thread1of1ForFork1_~arg.offset_5, P1Thread1of1ForFork1_~arg.base=v_P1Thread1of1ForFork1_~arg.base_5, P1Thread1of1ForFork1_#in~arg.base=|v_P1Thread1of1ForFork1_#in~arg.base_5|, P1Thread1of1ForFork1_#in~arg.offset=|v_P1Thread1of1ForFork1_#in~arg.offset_5|, ~x~0=v_~x~0_19} AuxVars[] AssignedVars[P1Thread1of1ForFork1_~arg.offset, P1Thread1of1ForFork1_~arg.base, ~x~0] [2022-12-05 22:58:03,053 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [378] L761-->L764: Formula: (= v_~x~0_1 1) InVars {} OutVars{~x~0=v_~x~0_1} AuxVars[] AssignedVars[~x~0] and [400] L824-->L840: Formula: (let ((.cse7 (= (mod v_~a$r_buff1_thd4~0_64 256) 0)) (.cse8 (= (mod v_~a$r_buff0_thd4~0_64 256) 0))) (let ((.cse9 (not .cse8)) (.cse2 (and .cse7 .cse8)) (.cse12 (= (mod v_~a$w_buff0_used~0_150 256) 0)) (.cse4 (and .cse8 (= (mod v_~a$w_buff1_used~0_139 256) 0)))) (let ((.cse10 (or .cse2 .cse12 .cse4)) (.cse11 (and (not .cse12) .cse9))) (let ((.cse5 (= (mod v_~a$w_buff1_used~0_138 256) 0)) (.cse3 (= (mod v_~a$w_buff0_used~0_149 256) 0)) (.cse1 (not (= (mod v_~weak$$choice2~0_30 256) 0))) (.cse0 (ite .cse10 v_~a~0_109 (ite .cse11 v_~a$w_buff0~0_69 v_~a$w_buff1~0_60)))) (and (= .cse0 v_~__unbuffered_p3_EBX~0_14) (= v_~weak$$choice2~0_30 |v_P3Thread1of1ForFork0_#t~nondet4_1|) (= (ite .cse1 v_~a$w_buff1_used~0_139 (ite (or .cse2 .cse3 .cse4) v_~a$w_buff1_used~0_139 0)) v_~a$w_buff1_used~0_138) (= v_~a~0_109 v_~a$mem_tmp~0_26) (= v_~weak$$choice0~0_5 |v_P3Thread1of1ForFork0_#t~nondet3_1|) (= v_~a$flush_delayed~0_29 0) (= v_~a$w_buff1~0_60 v_~a$w_buff1~0_59) (= (ite .cse1 v_~a$r_buff1_thd4~0_64 (ite (let ((.cse6 (= (mod v_~a$r_buff0_thd4~0_63 256) 0))) (or (and .cse5 .cse6) (and .cse7 .cse6) .cse3)) v_~a$r_buff1_thd4~0_64 0)) v_~a$r_buff1_thd4~0_63) (= v_~a$r_buff0_thd4~0_63 (ite .cse1 v_~a$r_buff0_thd4~0_64 (ite (or .cse2 (and .cse5 .cse8) .cse3) v_~a$r_buff0_thd4~0_64 (ite (and .cse9 (not .cse3)) 0 v_~a$r_buff0_thd4~0_64)))) (= (ite .cse1 v_~a$w_buff0_used~0_150 (ite .cse10 v_~a$w_buff0_used~0_150 (ite .cse11 0 v_~a$w_buff0_used~0_150))) v_~a$w_buff0_used~0_149) (= v_~a~0_108 (ite .cse1 v_~a$mem_tmp~0_26 .cse0)) (= v_~a$w_buff0~0_69 v_~a$w_buff0~0_68)))))) InVars {~a~0=v_~a~0_109, ~a$w_buff1~0=v_~a$w_buff1~0_60, ~a$w_buff0~0=v_~a$w_buff0~0_69, ~a$r_buff1_thd4~0=v_~a$r_buff1_thd4~0_64, ~a$w_buff0_used~0=v_~a$w_buff0_used~0_150, ~a$w_buff1_used~0=v_~a$w_buff1_used~0_139, ~a$r_buff0_thd4~0=v_~a$r_buff0_thd4~0_64, P3Thread1of1ForFork0_#t~nondet3=|v_P3Thread1of1ForFork0_#t~nondet3_1|, P3Thread1of1ForFork0_#t~nondet4=|v_P3Thread1of1ForFork0_#t~nondet4_1|} OutVars{~a$r_buff1_thd4~0=v_~a$r_buff1_thd4~0_63, ~a$w_buff0_used~0=v_~a$w_buff0_used~0_149, ~__unbuffered_p3_EBX~0=v_~__unbuffered_p3_EBX~0_14, ~a$r_buff0_thd4~0=v_~a$r_buff0_thd4~0_63, ~a~0=v_~a~0_108, ~a$mem_tmp~0=v_~a$mem_tmp~0_26, ~weak$$choice0~0=v_~weak$$choice0~0_5, ~a$w_buff1~0=v_~a$w_buff1~0_59, ~a$flush_delayed~0=v_~a$flush_delayed~0_29, ~a$w_buff0~0=v_~a$w_buff0~0_68, ~a$w_buff1_used~0=v_~a$w_buff1_used~0_138, ~weak$$choice2~0=v_~weak$$choice2~0_30} AuxVars[] AssignedVars[~a$r_buff1_thd4~0, ~a$w_buff0_used~0, ~__unbuffered_p3_EBX~0, ~a$r_buff0_thd4~0, ~a~0, ~a$mem_tmp~0, ~weak$$choice0~0, ~a$w_buff1~0, ~a$flush_delayed~0, ~a$w_buff0~0, ~a$w_buff1_used~0, ~weak$$choice2~0, P3Thread1of1ForFork0_#t~nondet3, P3Thread1of1ForFork0_#t~nondet4] [2022-12-05 22:58:03,452 INFO L203 LiptonReduction]: Total number of compositions: 2 [2022-12-05 22:58:03,453 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 482 [2022-12-05 22:58:03,453 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 606 flow [2022-12-05 22:58:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:58:03,453 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:58:03,454 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:58:03,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-05 22:58:03,454 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:58:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:58:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2132957045, now seen corresponding path program 1 times [2022-12-05 22:58:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:58:03,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171854393] [2022-12-05 22:58:03,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:58:03,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:58:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:58:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:58:04,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:58:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171854393] [2022-12-05 22:58:04,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171854393] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:58:04,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:58:04,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-05 22:58:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515332903] [2022-12-05 22:58:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:58:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 22:58:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:58:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 22:58:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-05 22:58:04,247 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2022-12-05 22:58:04,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:58:04,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:58:04,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2022-12-05 22:58:04,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:58:04,736 INFO L130 PetriNetUnfolder]: 1956/3253 cut-off events. [2022-12-05 22:58:04,736 INFO L131 PetriNetUnfolder]: For 12732/12897 co-relation queries the response was YES. [2022-12-05 22:58:04,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14857 conditions, 3253 events. 1956/3253 cut-off events. For 12732/12897 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18677 event pairs, 357 based on Foata normal form. 123/3345 useless extension candidates. Maximal degree in co-relation 14816. Up to 1322 conditions per place. [2022-12-05 22:58:04,755 INFO L137 encePairwiseOnDemand]: 21/30 looper letters, 99 selfloop transitions, 13 changer transitions 38/159 dead transitions. [2022-12-05 22:58:04,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 159 transitions, 1668 flow [2022-12-05 22:58:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 22:58:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 22:58:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2022-12-05 22:58:04,757 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2022-12-05 22:58:04,757 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 606 flow. Second operand 6 states and 107 transitions. [2022-12-05 22:58:04,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 159 transitions, 1668 flow [2022-12-05 22:58:04,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 159 transitions, 1401 flow, removed 77 selfloop flow, removed 9 redundant places. [2022-12-05 22:58:04,809 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 619 flow [2022-12-05 22:58:04,809 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=619, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2022-12-05 22:58:04,809 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 33 predicate places. [2022-12-05 22:58:04,809 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:58:04,810 INFO L89 Accepts]: Start accepts. Operand has 81 places, 70 transitions, 619 flow [2022-12-05 22:58:04,811 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:58:04,811 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:58:04,811 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 70 transitions, 619 flow [2022-12-05 22:58:04,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 70 transitions, 619 flow [2022-12-05 22:58:04,863 INFO L130 PetriNetUnfolder]: 315/781 cut-off events. [2022-12-05 22:58:04,863 INFO L131 PetriNetUnfolder]: For 1462/1527 co-relation queries the response was YES. [2022-12-05 22:58:04,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 781 events. 315/781 cut-off events. For 1462/1527 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5380 event pairs, 23 based on Foata normal form. 15/752 useless extension candidates. Maximal degree in co-relation 2615. Up to 235 conditions per place. [2022-12-05 22:58:04,869 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 70 transitions, 619 flow [2022-12-05 22:58:04,869 INFO L188 LiptonReduction]: Number of co-enabled transitions 780 [2022-12-05 22:58:05,275 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [378] L761-->L764: Formula: (= v_~x~0_1 1) InVars {} OutVars{~x~0=v_~x~0_1} AuxVars[] AssignedVars[~x~0] and [400] L824-->L840: Formula: (let ((.cse7 (= (mod v_~a$r_buff1_thd4~0_64 256) 0)) (.cse8 (= (mod v_~a$r_buff0_thd4~0_64 256) 0))) (let ((.cse9 (not .cse8)) (.cse2 (and .cse7 .cse8)) (.cse12 (= (mod v_~a$w_buff0_used~0_150 256) 0)) (.cse4 (and .cse8 (= (mod v_~a$w_buff1_used~0_139 256) 0)))) (let ((.cse10 (or .cse2 .cse12 .cse4)) (.cse11 (and (not .cse12) .cse9))) (let ((.cse5 (= (mod v_~a$w_buff1_used~0_138 256) 0)) (.cse3 (= (mod v_~a$w_buff0_used~0_149 256) 0)) (.cse1 (not (= (mod v_~weak$$choice2~0_30 256) 0))) (.cse0 (ite .cse10 v_~a~0_109 (ite .cse11 v_~a$w_buff0~0_69 v_~a$w_buff1~0_60)))) (and (= .cse0 v_~__unbuffered_p3_EBX~0_14) (= v_~weak$$choice2~0_30 |v_P3Thread1of1ForFork0_#t~nondet4_1|) (= (ite .cse1 v_~a$w_buff1_used~0_139 (ite (or .cse2 .cse3 .cse4) v_~a$w_buff1_used~0_139 0)) v_~a$w_buff1_used~0_138) (= v_~a~0_109 v_~a$mem_tmp~0_26) (= v_~weak$$choice0~0_5 |v_P3Thread1of1ForFork0_#t~nondet3_1|) (= v_~a$flush_delayed~0_29 0) (= v_~a$w_buff1~0_60 v_~a$w_buff1~0_59) (= (ite .cse1 v_~a$r_buff1_thd4~0_64 (ite (let ((.cse6 (= (mod v_~a$r_buff0_thd4~0_63 256) 0))) (or (and .cse5 .cse6) (and .cse7 .cse6) .cse3)) v_~a$r_buff1_thd4~0_64 0)) v_~a$r_buff1_thd4~0_63) (= v_~a$r_buff0_thd4~0_63 (ite .cse1 v_~a$r_buff0_thd4~0_64 (ite (or .cse2 (and .cse5 .cse8) .cse3) v_~a$r_buff0_thd4~0_64 (ite (and .cse9 (not .cse3)) 0 v_~a$r_buff0_thd4~0_64)))) (= (ite .cse1 v_~a$w_buff0_used~0_150 (ite .cse10 v_~a$w_buff0_used~0_150 (ite .cse11 0 v_~a$w_buff0_used~0_150))) v_~a$w_buff0_used~0_149) (= v_~a~0_108 (ite .cse1 v_~a$mem_tmp~0_26 .cse0)) (= v_~a$w_buff0~0_69 v_~a$w_buff0~0_68)))))) InVars {~a~0=v_~a~0_109, ~a$w_buff1~0=v_~a$w_buff1~0_60, ~a$w_buff0~0=v_~a$w_buff0~0_69, ~a$r_buff1_thd4~0=v_~a$r_buff1_thd4~0_64, ~a$w_buff0_used~0=v_~a$w_buff0_used~0_150, ~a$w_buff1_used~0=v_~a$w_buff1_used~0_139, ~a$r_buff0_thd4~0=v_~a$r_buff0_thd4~0_64, P3Thread1of1ForFork0_#t~nondet3=|v_P3Thread1of1ForFork0_#t~nondet3_1|, P3Thread1of1ForFork0_#t~nondet4=|v_P3Thread1of1ForFork0_#t~nondet4_1|} OutVars{~a$r_buff1_thd4~0=v_~a$r_buff1_thd4~0_63, ~a$w_buff0_used~0=v_~a$w_buff0_used~0_149, ~__unbuffered_p3_EBX~0=v_~__unbuffered_p3_EBX~0_14, ~a$r_buff0_thd4~0=v_~a$r_buff0_thd4~0_63, ~a~0=v_~a~0_108, ~a$mem_tmp~0=v_~a$mem_tmp~0_26, ~weak$$choice0~0=v_~weak$$choice0~0_5, ~a$w_buff1~0=v_~a$w_buff1~0_59, ~a$flush_delayed~0=v_~a$flush_delayed~0_29, ~a$w_buff0~0=v_~a$w_buff0~0_68, ~a$w_buff1_used~0=v_~a$w_buff1_used~0_138, ~weak$$choice2~0=v_~weak$$choice2~0_30} AuxVars[] AssignedVars[~a$r_buff1_thd4~0, ~a$w_buff0_used~0, ~__unbuffered_p3_EBX~0, ~a$r_buff0_thd4~0, ~a~0, ~a$mem_tmp~0, ~weak$$choice0~0, ~a$w_buff1~0, ~a$flush_delayed~0, ~a$w_buff0~0, ~a$w_buff1_used~0, ~weak$$choice2~0, P3Thread1of1ForFork0_#t~nondet3, P3Thread1of1ForFork0_#t~nondet4] [2022-12-05 22:58:05,426 INFO L203 LiptonReduction]: Total number of compositions: 2 [2022-12-05 22:58:05,427 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 618 [2022-12-05 22:58:05,427 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 609 flow [2022-12-05 22:58:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:58:05,427 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:58:05,428 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:58:05,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-05 22:58:05,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 22:58:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:58:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash -196960800, now seen corresponding path program 1 times [2022-12-05 22:58:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:58:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289970072] [2022-12-05 22:58:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:58:05,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:58:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:58:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:58:05,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:58:05,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289970072] [2022-12-05 22:58:05,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289970072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:58:05,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:58:05,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:58:05,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128700728] [2022-12-05 22:58:05,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:58:05,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:58:05,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:58:05,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:58:05,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:58:05,587 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2022-12-05 22:58:05,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 609 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:58:05,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:58:05,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2022-12-05 22:58:05,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:58:05,974 INFO L130 PetriNetUnfolder]: 2449/4019 cut-off events. [2022-12-05 22:58:05,974 INFO L131 PetriNetUnfolder]: For 11839/11912 co-relation queries the response was YES. [2022-12-05 22:58:05,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17445 conditions, 4019 events. 2449/4019 cut-off events. For 11839/11912 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23086 event pairs, 463 based on Foata normal form. 42/4050 useless extension candidates. Maximal degree in co-relation 17410. Up to 2060 conditions per place. [2022-12-05 22:58:05,989 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 50 selfloop transitions, 1 changer transitions 64/118 dead transitions. [2022-12-05 22:58:05,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 1127 flow [2022-12-05 22:58:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:58:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:58:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-12-05 22:58:05,992 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2022-12-05 22:58:05,992 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 609 flow. Second operand 4 states and 63 transitions. [2022-12-05 22:58:05,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 1127 flow [2022-12-05 22:58:06,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 1085 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-12-05 22:58:06,045 INFO L231 Difference]: Finished difference. Result has 80 places, 46 transitions, 313 flow [2022-12-05 22:58:06,045 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=313, PETRI_PLACES=80, PETRI_TRANSITIONS=46} [2022-12-05 22:58:06,046 INFO L294 CegarLoopForPetriNet]: 48 programPoint places, 32 predicate places. [2022-12-05 22:58:06,046 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-05 22:58:06,046 INFO L89 Accepts]: Start accepts. Operand has 80 places, 46 transitions, 313 flow [2022-12-05 22:58:06,047 INFO L95 Accepts]: Finished accepts. [2022-12-05 22:58:06,047 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:58:06,048 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 46 transitions, 313 flow [2022-12-05 22:58:06,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 46 transitions, 313 flow [2022-12-05 22:58:06,061 INFO L130 PetriNetUnfolder]: 66/173 cut-off events. [2022-12-05 22:58:06,061 INFO L131 PetriNetUnfolder]: For 233/243 co-relation queries the response was YES. [2022-12-05 22:58:06,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 173 events. 66/173 cut-off events. For 233/243 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 707 event pairs, 9 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 540. Up to 52 conditions per place. [2022-12-05 22:58:06,062 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 46 transitions, 313 flow [2022-12-05 22:58:06,063 INFO L188 LiptonReduction]: Number of co-enabled transitions 328 [2022-12-05 22:58:07,838 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [538] $Ultimate##0-->L764: Formula: (and (= v_~a$r_buff0_thd3~0_154 v_~a$r_buff1_thd3~0_165) (= v_~a$w_buff0_used~0_639 v_~a$w_buff1_used~0_571) (= v_~a$r_buff0_thd0~0_240 v_~a$r_buff1_thd0~0_249) (= v_~a$r_buff0_thd1~0_220 v_~a$r_buff1_thd1~0_149) (= v_~a$r_buff0_thd4~0_229 v_~a$r_buff1_thd4~0_241) (= v_~x~0_116 1) (= |v_P0Thread1of1ForFork3_#in~arg#1.offset_71| |v_P0Thread1of1ForFork3_~arg#1.offset_71|) (= v_~a$r_buff0_thd2~0_181 v_~a$r_buff1_thd2~0_183) (= |v_P0Thread1of1ForFork3___VERIFIER_assert_~expression#1_73| |v_P0Thread1of1ForFork3___VERIFIER_assert_#in~expression#1_73|) (= v_~a$w_buff0_used~0_638 1) (= v_~a$w_buff0~0_365 1) (= v_~a$w_buff0~0_366 v_~a$w_buff1~0_307) (= v_~a$r_buff0_thd1~0_219 1) (= (ite (not (and (not (= (mod v_~a$w_buff0_used~0_638 256) 0)) (not (= (mod v_~a$w_buff1_used~0_571 256) 0)))) 1 0) |v_P0Thread1of1ForFork3___VERIFIER_assert_#in~expression#1_73|) (= |v_P0Thread1of1ForFork3_#in~arg#1.base_71| |v_P0Thread1of1ForFork3_~arg#1.base_71|) (not (= |v_P0Thread1of1ForFork3___VERIFIER_assert_~expression#1_73| 0))) InVars {P0Thread1of1ForFork3_#in~arg#1.offset=|v_P0Thread1of1ForFork3_#in~arg#1.offset_71|, ~a$w_buff0~0=v_~a$w_buff0~0_366, P0Thread1of1ForFork3_#in~arg#1.base=|v_P0Thread1of1ForFork3_#in~arg#1.base_71|, ~a$r_buff0_thd2~0=v_~a$r_buff0_thd2~0_181, ~a$r_buff0_thd3~0=v_~a$r_buff0_thd3~0_154, ~a$w_buff0_used~0=v_~a$w_buff0_used~0_639, ~a$r_buff0_thd1~0=v_~a$r_buff0_thd1~0_220, ~a$r_buff0_thd0~0=v_~a$r_buff0_thd0~0_240, ~a$r_buff0_thd4~0=v_~a$r_buff0_thd4~0_229} OutVars{P0Thread1of1ForFork3_#in~arg#1.offset=|v_P0Thread1of1ForFork3_#in~arg#1.offset_71|, ~a$r_buff1_thd4~0=v_~a$r_buff1_thd4~0_241, ~a$r_buff1_thd1~0=v_~a$r_buff1_thd1~0_149, P0Thread1of1ForFork3_#in~arg#1.base=|v_P0Thread1of1ForFork3_#in~arg#1.base_71|, ~a$r_buff1_thd3~0=v_~a$r_buff1_thd3~0_165, ~a$r_buff1_thd2~0=v_~a$r_buff1_thd2~0_183, P0Thread1of1ForFork3___VERIFIER_assert_#in~expression#1=|v_P0Thread1of1ForFork3___VERIFIER_assert_#in~expression#1_73|, ~a$r_buff0_thd2~0=v_~a$r_buff0_thd2~0_181, ~a$r_buff0_thd3~0=v_~a$r_buff0_thd3~0_154, ~a$w_buff0_used~0=v_~a$w_buff0_used~0_638, ~a$r_buff0_thd1~0=v_~a$r_buff0_thd1~0_219, ~a$r_buff0_thd0~0=v_~a$r_buff0_thd0~0_240, ~a$r_buff0_thd4~0=v_~a$r_buff0_thd4~0_229, P0Thread1of1ForFork3_~arg#1.base=|v_P0Thread1of1ForFork3_~arg#1.base_71|, P0Thread1of1ForFork3_~arg#1.offset=|v_P0Thread1of1ForFork3_~arg#1.offset_71|, P0Thread1of1ForFork3___VERIFIER_assert_~expression#1=|v_P0Thread1of1ForFork3___VERIFIER_assert_~expression#1_73|, ~a$w_buff1~0=v_~a$w_buff1~0_307, ~a$w_buff0~0=v_~a$w_buff0~0_365, ~a$r_buff1_thd0~0=v_~a$r_buff1_thd0~0_249, ~a$w_buff1_used~0=v_~a$w_buff1_used~0_571, ~x~0=v_~x~0_116} AuxVars[] AssignedVars[~a$r_buff1_thd4~0, ~a$r_buff1_thd1~0, ~a$r_buff1_thd3~0, ~a$r_buff1_thd2~0, P0Thread1of1ForFork3___VERIFIER_assert_#in~expression#1, ~a$w_buff0_used~0, ~a$r_buff0_thd1~0, P0Thread1of1ForFork3_~arg#1.base, P0Thread1of1ForFork3_~arg#1.offset, P0Thread1of1ForFork3___VERIFIER_assert_~expression#1, ~a$w_buff1~0, ~a$w_buff0~0, ~a$r_buff1_thd0~0, ~a$w_buff1_used~0, ~x~0] and [445] $Ultimate##0-->L781: Formula: (and (= |v_P1Thread1of1ForFork1_#in~arg.offset_5| v_P1Thread1of1ForFork1_~arg.offset_5) (= v_~x~0_19 2) (= v_P1Thread1of1ForFork1_~arg.base_5 |v_P1Thread1of1ForFork1_#in~arg.base_5|)) InVars {P1Thread1of1ForFork1_#in~arg.base=|v_P1Thread1of1ForFork1_#in~arg.base_5|, P1Thread1of1ForFork1_#in~arg.offset=|v_P1Thread1of1ForFork1_#in~arg.offset_5|} OutVars{P1Thread1of1ForFork1_~arg.offset=v_P1Thread1of1ForFork1_~arg.offset_5, P1Thread1of1ForFork1_~arg.base=v_P1Thread1of1ForFork1_~arg.base_5, P1Thread1of1ForFork1_#in~arg.base=|v_P1Thread1of1ForFork1_#in~arg.base_5|, P1Thread1of1ForFork1_#in~arg.offset=|v_P1Thread1of1ForFork1_#in~arg.offset_5|, ~x~0=v_~x~0_19} AuxVars[] AssignedVars[P1Thread1of1ForFork1_~arg.offset, P1Thread1of1ForFork1_~arg.base, ~x~0]