./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:59:06,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:59:06,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:59:06,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:59:06,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:59:06,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:59:06,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:59:06,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:59:06,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:59:06,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:59:06,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:59:06,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:59:06,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:59:06,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:59:06,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:59:06,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:59:06,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:59:06,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:59:06,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:59:06,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:59:06,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:59:06,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:59:06,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:59:06,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:59:06,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:59:06,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:59:06,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:59:06,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:59:06,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:59:06,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:59:06,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:59:06,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:59:06,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:59:06,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:59:06,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:59:06,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:59:06,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:59:06,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:59:06,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:59:06,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:59:06,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:59:06,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:59:06,921 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:59:06,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:59:06,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:59:06,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:59:06,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:59:06,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:59:06,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:59:06,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:59:06,924 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:59:06,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:59:06,925 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:59:06,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:59:06,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:59:06,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:59:06,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:59:06,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:59:06,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:59:06,927 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:59:06,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:59:06,927 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:59:06,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:59:06,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:59:06,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:59:06,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:59:06,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:59:06,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:59:06,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:59:06,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:59:06,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:59:06,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:59:06,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:59:06,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:59:06,930 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:59:06,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:59:06,930 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:59:06,931 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:59:07,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:59:07,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:59:07,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:59:07,278 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:59:07,280 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:59:07,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-30 22:59:08,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:59:08,720 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:59:08,720 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-30 22:59:08,735 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a761c9240/f60f8492430f46df85a4fa86a230eb96/FLAG07de11feb [2023-08-30 22:59:08,747 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a761c9240/f60f8492430f46df85a4fa86a230eb96 [2023-08-30 22:59:08,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:59:08,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:59:08,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:59:08,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:59:08,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:59:08,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:59:08" (1/1) ... [2023-08-30 22:59:08,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a84634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:08, skipping insertion in model container [2023-08-30 22:59:08,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:59:08" (1/1) ... [2023-08-30 22:59:08,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:59:08,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:59:09,048 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-30 22:59:09,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:59:09,070 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:59:09,108 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-30 22:59:09,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:59:09,143 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:59:09,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09 WrapperNode [2023-08-30 22:59:09,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:59:09,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:59:09,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:59:09,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:59:09,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,178 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2023-08-30 22:59:09,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:59:09,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:59:09,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:59:09,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:59:09,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:59:09,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:59:09,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:59:09,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:59:09,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (1/1) ... [2023-08-30 22:59:09,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:59:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:59:09,242 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) [2023-08-30 22:59:09,257 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 [2023-08-30 22:59:09,282 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-30 22:59:09,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-30 22:59:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:59:09,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:59:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:59:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:59:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:59:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:59:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:59:09,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:59:09,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:59:09,287 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:59:09,447 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:59:09,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:59:09,619 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:59:09,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:59:09,683 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 22:59:09,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:59:09 BoogieIcfgContainer [2023-08-30 22:59:09,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:59:09,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:59:09,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:59:09,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:59:09,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:59:08" (1/3) ... [2023-08-30 22:59:09,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6306f13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:59:09, skipping insertion in model container [2023-08-30 22:59:09,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:59:09" (2/3) ... [2023-08-30 22:59:09,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6306f13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:59:09, skipping insertion in model container [2023-08-30 22:59:09,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:59:09" (3/3) ... [2023-08-30 22:59:09,698 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-30 22:59:09,706 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:59:09,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:59:09,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:59:09,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:59:09,784 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:09,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 132 flow [2023-08-30 22:59:09,882 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-08-30 22:59:09,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:09,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-30 22:59:09,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 132 flow [2023-08-30 22:59:09,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 60 transitions, 128 flow [2023-08-30 22:59:09,899 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:09,920 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-30 22:59:09,927 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-30 22:59:09,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 60 transitions, 128 flow [2023-08-30 22:59:09,968 INFO L130 PetriNetUnfolder]: 7/70 cut-off events. [2023-08-30 22:59:09,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:09,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-30 22:59:09,971 INFO L119 LiptonReduction]: Number of co-enabled transitions 1040 [2023-08-30 22:59:11,162 INFO L134 LiptonReduction]: Checked pairs total: 1951 [2023-08-30 22:59:11,162 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-30 22:59:11,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:11,178 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:11,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:59:11,182 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 22:59:11,182 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:11,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:11,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 22:59:11,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 22:59:11,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash 312627833, now seen corresponding path program 1 times [2023-08-30 22:59:11,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:11,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507971336] [2023-08-30 22:59:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:11,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:11,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507971336] [2023-08-30 22:59:11,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507971336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:11,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:11,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134662946] [2023-08-30 22:59:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:11,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:11,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 104 [2023-08-30 22:59:11,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-08-30 22:59:11,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:11,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 104 [2023-08-30 22:59:11,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:11,598 INFO L130 PetriNetUnfolder]: 139/236 cut-off events. [2023-08-30 22:59:11,599 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 22:59:11,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 236 events. 139/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 783 event pairs, 39 based on Foata normal form. 21/244 useless extension candidates. Maximal degree in co-relation 470. Up to 170 conditions per place. [2023-08-30 22:59:11,603 INFO L137 encePairwiseOnDemand]: 96/104 looper letters, 18 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-30 22:59:11,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 96 flow [2023-08-30 22:59:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-08-30 22:59:11,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2023-08-30 22:59:11,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-08-30 22:59:11,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-08-30 22:59:11,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:11,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-08-30 22:59:11,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2023-08-30 22:59:11,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-08-30 22:59:11,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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) [2023-08-30 22:59:11,635 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 161 transitions. [2023-08-30 22:59:11,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 96 flow [2023-08-30 22:59:11,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:11,639 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 57 flow [2023-08-30 22:59:11,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-30 22:59:11,644 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-30 22:59:11,644 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 57 flow [2023-08-30 22:59:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-08-30 22:59:11,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:11,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:59:11,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 22:59:11,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1213610001, now seen corresponding path program 1 times [2023-08-30 22:59:11,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:11,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183220767] [2023-08-30 22:59:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:11,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:11,704 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:11,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:11,742 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:11,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:59:11,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:59:11,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 22:59:11,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:59:11,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:59:11,751 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:59:11,753 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:11,753 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:59:11,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:11,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 88 transitions, 200 flow [2023-08-30 22:59:11,795 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-08-30 22:59:11,795 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:59:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2023-08-30 22:59:11,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 88 transitions, 200 flow [2023-08-30 22:59:11,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 73 transitions, 161 flow [2023-08-30 22:59:11,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:11,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-30 22:59:11,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-30 22:59:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 161 flow [2023-08-30 22:59:11,806 INFO L130 PetriNetUnfolder]: 10/95 cut-off events. [2023-08-30 22:59:11,806 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:59:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-30 22:59:11,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 2002 [2023-08-30 22:59:12,883 INFO L134 LiptonReduction]: Checked pairs total: 5986 [2023-08-30 22:59:12,884 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-30 22:59:12,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:12,886 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:12,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:59:12,888 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-08-30 22:59:12,888 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:12,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:12,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 22:59:12,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:59:12,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash 466134105, now seen corresponding path program 1 times [2023-08-30 22:59:12,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321890967] [2023-08-30 22:59:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:12,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321890967] [2023-08-30 22:59:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321890967] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:12,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:12,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806342136] [2023-08-30 22:59:12,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:12,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 134 [2023-08-30 22:59:12,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-08-30 22:59:12,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:12,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 134 [2023-08-30 22:59:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:13,118 INFO L130 PetriNetUnfolder]: 637/1045 cut-off events. [2023-08-30 22:59:13,118 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-08-30 22:59:13,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 1045 events. 637/1045 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5197 event pairs, 142 based on Foata normal form. 15/1058 useless extension candidates. Maximal degree in co-relation 2031. Up to 799 conditions per place. [2023-08-30 22:59:13,127 INFO L137 encePairwiseOnDemand]: 125/134 looper letters, 22 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-30 22:59:13,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 142 flow [2023-08-30 22:59:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-08-30 22:59:13,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074626865671642 [2023-08-30 22:59:13,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-08-30 22:59:13,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-08-30 22:59:13,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:13,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-08-30 22:59:13,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2023-08-30 22:59:13,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-08-30 22:59:13,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-08-30 22:59:13,143 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 81 flow. Second operand 3 states and 204 transitions. [2023-08-30 22:59:13,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 142 flow [2023-08-30 22:59:13,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:13,145 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 87 flow [2023-08-30 22:59:13,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 22:59:13,146 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-08-30 22:59:13,146 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 87 flow [2023-08-30 22:59:13,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-08-30 22:59:13,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:13,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:13,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:59:13,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:59:13,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash -317088850, now seen corresponding path program 1 times [2023-08-30 22:59:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:13,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152966507] [2023-08-30 22:59:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:13,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:13,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152966507] [2023-08-30 22:59:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152966507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:13,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:13,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:13,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829392569] [2023-08-30 22:59:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:13,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:13,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:13,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 134 [2023-08-30 22:59:13,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-08-30 22:59:13,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:13,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 134 [2023-08-30 22:59:13,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:13,306 INFO L130 PetriNetUnfolder]: 90/300 cut-off events. [2023-08-30 22:59:13,306 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:59:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 300 events. 90/300 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1431 event pairs, 20 based on Foata normal form. 86/385 useless extension candidates. Maximal degree in co-relation 549. Up to 104 conditions per place. [2023-08-30 22:59:13,308 INFO L137 encePairwiseOnDemand]: 128/134 looper letters, 11 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-30 22:59:13,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 137 flow [2023-08-30 22:59:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-08-30 22:59:13,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049751243781094 [2023-08-30 22:59:13,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-08-30 22:59:13,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-08-30 22:59:13,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:13,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-08-30 22:59:13,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2023-08-30 22:59:13,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-08-30 22:59:13,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-08-30 22:59:13,313 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 87 flow. Second operand 3 states and 203 transitions. [2023-08-30 22:59:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 137 flow [2023-08-30 22:59:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:13,315 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 96 flow [2023-08-30 22:59:13,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-30 22:59:13,316 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-08-30 22:59:13,316 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 96 flow [2023-08-30 22:59:13,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-08-30 22:59:13,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:13,317 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:13,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:59:13,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 22:59:13,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 301038790, now seen corresponding path program 1 times [2023-08-30 22:59:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:13,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405474775] [2023-08-30 22:59:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:13,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:13,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:13,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:13,339 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:13,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:59:13,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:59:13,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-30 22:59:13,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:59:13,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:59:13,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:59:13,340 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 22:59:13,341 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:13,341 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:59:13,360 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:13,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 272 flow [2023-08-30 22:59:13,371 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-08-30 22:59:13,371 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:59:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-30 22:59:13,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 272 flow [2023-08-30 22:59:13,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 86 transitions, 196 flow [2023-08-30 22:59:13,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:13,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-30 22:59:13,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-30 22:59:13,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 86 transitions, 196 flow [2023-08-30 22:59:13,389 INFO L130 PetriNetUnfolder]: 13/120 cut-off events. [2023-08-30 22:59:13,389 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:59:13,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2023-08-30 22:59:13,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-30 22:59:14,457 INFO L134 LiptonReduction]: Checked pairs total: 11749 [2023-08-30 22:59:14,458 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-30 22:59:14,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:14,461 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:14,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:59:14,463 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 22:59:14,463 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:14,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:14,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 22:59:14,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 22:59:14,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash 650129635, now seen corresponding path program 1 times [2023-08-30 22:59:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:14,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596346445] [2023-08-30 22:59:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:14,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596346445] [2023-08-30 22:59:14,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596346445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:14,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642511348] [2023-08-30 22:59:14,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:14,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:14,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 166 [2023-08-30 22:59:14,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-08-30 22:59:14,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:14,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 166 [2023-08-30 22:59:14,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:15,059 INFO L130 PetriNetUnfolder]: 4385/6259 cut-off events. [2023-08-30 22:59:15,061 INFO L131 PetriNetUnfolder]: For 729/729 co-relation queries the response was YES. [2023-08-30 22:59:15,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12501 conditions, 6259 events. 4385/6259 cut-off events. For 729/729 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33596 event pairs, 1106 based on Foata normal form. 31/6285 useless extension candidates. Maximal degree in co-relation 12489. Up to 5431 conditions per place. [2023-08-30 22:59:15,108 INFO L137 encePairwiseOnDemand]: 155/166 looper letters, 29 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-30 22:59:15,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 196 flow [2023-08-30 22:59:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-30 22:59:15,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020080321285141 [2023-08-30 22:59:15,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-30 22:59:15,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-30 22:59:15,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:15,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-30 22:59:15,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2023-08-30 22:59:15,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2023-08-30 22:59:15,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2023-08-30 22:59:15,115 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 110 flow. Second operand 3 states and 250 transitions. [2023-08-30 22:59:15,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 196 flow [2023-08-30 22:59:15,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 187 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:15,120 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 115 flow [2023-08-30 22:59:15,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-30 22:59:15,123 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2023-08-30 22:59:15,124 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 115 flow [2023-08-30 22:59:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-08-30 22:59:15,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:15,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:15,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:59:15,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 22:59:15,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash -277914766, now seen corresponding path program 1 times [2023-08-30 22:59:15,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:15,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663591839] [2023-08-30 22:59:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:15,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663591839] [2023-08-30 22:59:15,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663591839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:15,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:15,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:15,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425405953] [2023-08-30 22:59:15,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:15,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:15,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:15,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:15,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 166 [2023-08-30 22:59:15,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2023-08-30 22:59:15,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:15,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 166 [2023-08-30 22:59:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:15,326 INFO L130 PetriNetUnfolder]: 240/785 cut-off events. [2023-08-30 22:59:15,326 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 22:59:15,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 785 events. 240/785 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4868 event pairs, 49 based on Foata normal form. 326/1102 useless extension candidates. Maximal degree in co-relation 1442. Up to 273 conditions per place. [2023-08-30 22:59:15,331 INFO L137 encePairwiseOnDemand]: 158/166 looper letters, 13 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-30 22:59:15,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 180 flow [2023-08-30 22:59:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 22:59:15,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080321285140562 [2023-08-30 22:59:15,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 22:59:15,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 22:59:15,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:15,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 22:59:15,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-08-30 22:59:15,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2023-08-30 22:59:15,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2023-08-30 22:59:15,336 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 115 flow. Second operand 3 states and 253 transitions. [2023-08-30 22:59:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 180 flow [2023-08-30 22:59:15,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:15,338 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 127 flow [2023-08-30 22:59:15,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-30 22:59:15,339 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-30 22:59:15,339 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 127 flow [2023-08-30 22:59:15,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2023-08-30 22:59:15,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:15,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:15,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:59:15,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 22:59:15,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash -494400844, now seen corresponding path program 1 times [2023-08-30 22:59:15,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:15,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206650342] [2023-08-30 22:59:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:15,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:15,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206650342] [2023-08-30 22:59:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206650342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:15,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:15,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:15,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207518211] [2023-08-30 22:59:15,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:15,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:59:15,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:15,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:59:15,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:59:15,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-30 22:59:15,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 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) [2023-08-30 22:59:15,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:15,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-30 22:59:15,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:15,610 INFO L130 PetriNetUnfolder]: 589/1385 cut-off events. [2023-08-30 22:59:15,610 INFO L131 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2023-08-30 22:59:15,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3469 conditions, 1385 events. 589/1385 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9587 event pairs, 33 based on Foata normal form. 12/1393 useless extension candidates. Maximal degree in co-relation 3455. Up to 765 conditions per place. [2023-08-30 22:59:15,619 INFO L137 encePairwiseOnDemand]: 155/166 looper letters, 49 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2023-08-30 22:59:15,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 391 flow [2023-08-30 22:59:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:59:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:59:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2023-08-30 22:59:15,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367469879518072 [2023-08-30 22:59:15,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 435 transitions. [2023-08-30 22:59:15,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 435 transitions. [2023-08-30 22:59:15,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:15,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 435 transitions. [2023-08-30 22:59:15,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 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) [2023-08-30 22:59:15,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 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) [2023-08-30 22:59:15,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 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) [2023-08-30 22:59:15,625 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 127 flow. Second operand 6 states and 435 transitions. [2023-08-30 22:59:15,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 391 flow [2023-08-30 22:59:15,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:15,628 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 207 flow [2023-08-30 22:59:15,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-30 22:59:15,629 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-30 22:59:15,629 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 207 flow [2023-08-30 22:59:15,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 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) [2023-08-30 22:59:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:15,630 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 22:59:15,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-30 22:59:15,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2022817787, now seen corresponding path program 1 times [2023-08-30 22:59:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865381520] [2023-08-30 22:59:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:15,650 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:15,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:15,668 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:15,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 22:59:15,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 22:59:15,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-30 22:59:15,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 22:59:15,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 22:59:15,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 22:59:15,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 22:59:15,670 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 22:59:15,671 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:15,671 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:59:15,700 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:15,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 348 flow [2023-08-30 22:59:15,712 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 22:59:15,713 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:59:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 284 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 165. Up to 10 conditions per place. [2023-08-30 22:59:15,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 348 flow [2023-08-30 22:59:15,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 233 flow [2023-08-30 22:59:15,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:15,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-30 22:59:15,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-30 22:59:15,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 233 flow [2023-08-30 22:59:15,725 INFO L130 PetriNetUnfolder]: 16/145 cut-off events. [2023-08-30 22:59:15,725 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:59:15,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 273 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 10 conditions per place. [2023-08-30 22:59:15,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 4862 [2023-08-30 22:59:16,732 INFO L134 LiptonReduction]: Checked pairs total: 16289 [2023-08-30 22:59:16,732 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 22:59:16,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:16,739 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:16,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 22:59:16,742 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 22:59:16,743 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:16,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:16,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 22:59:16,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:59:16,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash 864675117, now seen corresponding path program 1 times [2023-08-30 22:59:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:16,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949367591] [2023-08-30 22:59:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:16,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:16,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949367591] [2023-08-30 22:59:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949367591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:16,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:16,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:16,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684795379] [2023-08-30 22:59:16,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:16,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:16,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 198 [2023-08-30 22:59:16,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-08-30 22:59:16,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:16,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 198 [2023-08-30 22:59:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:21,592 INFO L130 PetriNetUnfolder]: 52253/69823 cut-off events. [2023-08-30 22:59:21,593 INFO L131 PetriNetUnfolder]: For 13262/13262 co-relation queries the response was YES. [2023-08-30 22:59:21,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141592 conditions, 69823 events. 52253/69823 cut-off events. For 13262/13262 co-relation queries the response was YES. Maximal size of possible extension queue 2252. Compared 435888 event pairs, 15211 based on Foata normal form. 0/68268 useless extension candidates. Maximal degree in co-relation 141579. Up to 46663 conditions per place. [2023-08-30 22:59:22,184 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 41 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2023-08-30 22:59:22,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 292 flow [2023-08-30 22:59:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-30 22:59:22,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2023-08-30 22:59:22,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-30 22:59:22,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-30 22:59:22,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:22,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-30 22:59:22,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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) [2023-08-30 22:59:22,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-08-30 22:59:22,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-08-30 22:59:22,188 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 139 flow. Second operand 3 states and 288 transitions. [2023-08-30 22:59:22,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 292 flow [2023-08-30 22:59:22,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 273 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:22,203 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 188 flow [2023-08-30 22:59:22,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2023-08-30 22:59:22,204 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 22:59:22,204 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 188 flow [2023-08-30 22:59:22,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-08-30 22:59:22,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:22,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:22,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 22:59:22,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:59:22,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1743963062, now seen corresponding path program 1 times [2023-08-30 22:59:22,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:22,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200028177] [2023-08-30 22:59:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:22,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:22,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200028177] [2023-08-30 22:59:22,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200028177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:22,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:22,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119504738] [2023-08-30 22:59:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:22,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:22,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:22,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 198 [2023-08-30 22:59:22,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-08-30 22:59:22,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:22,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 198 [2023-08-30 22:59:22,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:22,482 INFO L130 PetriNetUnfolder]: 794/2336 cut-off events. [2023-08-30 22:59:22,482 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2023-08-30 22:59:22,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 2336 events. 794/2336 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17761 event pairs, 99 based on Foata normal form. 1373/3703 useless extension candidates. Maximal degree in co-relation 4680. Up to 881 conditions per place. [2023-08-30 22:59:22,499 INFO L137 encePairwiseOnDemand]: 188/198 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-08-30 22:59:22,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 244 flow [2023-08-30 22:59:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-30 22:59:22,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2023-08-30 22:59:22,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-30 22:59:22,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-30 22:59:22,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:22,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-30 22:59:22,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2023-08-30 22:59:22,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-08-30 22:59:22,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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) [2023-08-30 22:59:22,505 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 188 flow. Second operand 3 states and 303 transitions. [2023-08-30 22:59:22,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 244 flow [2023-08-30 22:59:22,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 224 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 22:59:22,511 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 164 flow [2023-08-30 22:59:22,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-30 22:59:22,513 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-30 22:59:22,513 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 164 flow [2023-08-30 22:59:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-08-30 22:59:22,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:22,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:22,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 22:59:22,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:59:22,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -945521319, now seen corresponding path program 1 times [2023-08-30 22:59:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:22,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341702464] [2023-08-30 22:59:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341702464] [2023-08-30 22:59:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341702464] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:22,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:22,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166036211] [2023-08-30 22:59:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:22,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:59:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:59:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:59:22,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 198 [2023-08-30 22:59:22,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 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) [2023-08-30 22:59:22,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:22,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 198 [2023-08-30 22:59:22,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:23,044 INFO L130 PetriNetUnfolder]: 1997/4329 cut-off events. [2023-08-30 22:59:23,044 INFO L131 PetriNetUnfolder]: For 1660/1661 co-relation queries the response was YES. [2023-08-30 22:59:23,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 4329 events. 1997/4329 cut-off events. For 1660/1661 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 35055 event pairs, 65 based on Foata normal form. 0/4276 useless extension candidates. Maximal degree in co-relation 11219. Up to 2808 conditions per place. [2023-08-30 22:59:23,069 INFO L137 encePairwiseOnDemand]: 184/198 looper letters, 71 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2023-08-30 22:59:23,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 104 transitions, 580 flow [2023-08-30 22:59:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:59:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:59:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2023-08-30 22:59:23,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41835016835016836 [2023-08-30 22:59:23,071 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2023-08-30 22:59:23,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2023-08-30 22:59:23,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:23,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2023-08-30 22:59:23,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 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) [2023-08-30 22:59:23,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2023-08-30 22:59:23,075 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 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) [2023-08-30 22:59:23,076 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 164 flow. Second operand 6 states and 497 transitions. [2023-08-30 22:59:23,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 104 transitions, 580 flow [2023-08-30 22:59:23,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 104 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:23,081 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 322 flow [2023-08-30 22:59:23,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-30 22:59:23,081 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-30 22:59:23,082 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 322 flow [2023-08-30 22:59:23,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 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) [2023-08-30 22:59:23,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:23,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:23,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 22:59:23,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:59:23,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash -580213840, now seen corresponding path program 2 times [2023-08-30 22:59:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:23,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579158065] [2023-08-30 22:59:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:23,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:23,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579158065] [2023-08-30 22:59:23,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579158065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:59:23,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399018572] [2023-08-30 22:59:23,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:59:23,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:59:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:59:23,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:59:23,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:59:23,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:59:23,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:59:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 22:59:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:59:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:23,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:59:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:23,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399018572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:59:23,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:59:23,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 22:59:23,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219044632] [2023-08-30 22:59:23,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:59:23,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 22:59:23,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 22:59:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 22:59:23,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 198 [2023-08-30 22:59:23,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 322 flow. Second operand has 20 states, 20 states have (on average 70.85) internal successors, (1417), 20 states have internal predecessors, (1417), 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) [2023-08-30 22:59:23,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:23,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 198 [2023-08-30 22:59:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:25,077 INFO L130 PetriNetUnfolder]: 3472/6945 cut-off events. [2023-08-30 22:59:25,077 INFO L131 PetriNetUnfolder]: For 3051/3051 co-relation queries the response was YES. [2023-08-30 22:59:25,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 6945 events. 3472/6945 cut-off events. For 3051/3051 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 59671 event pairs, 51 based on Foata normal form. 40/6983 useless extension candidates. Maximal degree in co-relation 19012. Up to 3249 conditions per place. [2023-08-30 22:59:25,105 INFO L137 encePairwiseOnDemand]: 180/198 looper letters, 104 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2023-08-30 22:59:25,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 159 transitions, 1009 flow [2023-08-30 22:59:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 22:59:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 22:59:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 886 transitions. [2023-08-30 22:59:25,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067952249770432 [2023-08-30 22:59:25,109 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 886 transitions. [2023-08-30 22:59:25,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 886 transitions. [2023-08-30 22:59:25,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:25,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 886 transitions. [2023-08-30 22:59:25,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 80.54545454545455) internal successors, (886), 11 states have internal predecessors, (886), 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) [2023-08-30 22:59:25,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 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) [2023-08-30 22:59:25,115 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 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) [2023-08-30 22:59:25,115 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 322 flow. Second operand 11 states and 886 transitions. [2023-08-30 22:59:25,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 159 transitions, 1009 flow [2023-08-30 22:59:25,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 159 transitions, 1009 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:25,123 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 603 flow [2023-08-30 22:59:25,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=603, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2023-08-30 22:59:25,124 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-08-30 22:59:25,124 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 603 flow [2023-08-30 22:59:25,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.85) internal successors, (1417), 20 states have internal predecessors, (1417), 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) [2023-08-30 22:59:25,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:25,125 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:25,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 22:59:25,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 22:59:25,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 22:59:25,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash -988573763, now seen corresponding path program 1 times [2023-08-30 22:59:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:25,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482606785] [2023-08-30 22:59:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:25,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:25,367 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:25,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:25,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 22:59:25,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 22:59:25,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-30 22:59:25,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-30 22:59:25,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-30 22:59:25,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-30 22:59:25,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 22:59:25,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 22:59:25,370 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-30 22:59:25,370 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:25,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 22:59:25,402 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:25,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 169 transitions, 428 flow [2023-08-30 22:59:25,415 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-08-30 22:59:25,415 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:59:25,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 197. Up to 12 conditions per place. [2023-08-30 22:59:25,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 169 transitions, 428 flow [2023-08-30 22:59:25,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 272 flow [2023-08-30 22:59:25,418 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:59:25,418 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-30 22:59:25,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-30 22:59:25,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 272 flow [2023-08-30 22:59:25,428 INFO L130 PetriNetUnfolder]: 19/170 cut-off events. [2023-08-30 22:59:25,429 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 22:59:25,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 176. Up to 12 conditions per place. [2023-08-30 22:59:25,434 INFO L119 LiptonReduction]: Number of co-enabled transitions 6760 [2023-08-30 22:59:26,574 INFO L134 LiptonReduction]: Checked pairs total: 23480 [2023-08-30 22:59:26,574 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-30 22:59:26,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:59:26,575 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:59:26,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 22:59:26,577 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 22:59:26,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:59:26,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:26,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 22:59:26,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-30 22:59:26,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1109720930, now seen corresponding path program 1 times [2023-08-30 22:59:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854524440] [2023-08-30 22:59:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:26,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:26,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854524440] [2023-08-30 22:59:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854524440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:26,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:26,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 22:59:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268439313] [2023-08-30 22:59:26,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:26,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:26,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 230 [2023-08-30 22:59:26,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2023-08-30 22:59:26,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:26,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 230 [2023-08-30 22:59:26,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:52,731 INFO L130 PetriNetUnfolder]: 321313/408610 cut-off events. [2023-08-30 22:59:52,732 INFO L131 PetriNetUnfolder]: For 103126/103126 co-relation queries the response was YES. [2023-08-30 22:59:53,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835609 conditions, 408610 events. 321313/408610 cut-off events. For 103126/103126 co-relation queries the response was YES. Maximal size of possible extension queue 10315. Compared 2632165 event pairs, 101379 based on Foata normal form. 0/400803 useless extension candidates. Maximal degree in co-relation 835595. Up to 281255 conditions per place. [2023-08-30 22:59:55,804 INFO L137 encePairwiseOnDemand]: 209/230 looper letters, 49 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2023-08-30 22:59:55,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 362 flow [2023-08-30 22:59:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-30 22:59:55,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826086956521739 [2023-08-30 22:59:55,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-30 22:59:55,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-30 22:59:55,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:55,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-30 22:59:55,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2023-08-30 22:59:55,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-30 22:59:55,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-30 22:59:55,815 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 170 flow. Second operand 3 states and 333 transitions. [2023-08-30 22:59:55,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 362 flow [2023-08-30 22:59:55,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 329 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:55,886 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 225 flow [2023-08-30 22:59:55,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-08-30 22:59:55,887 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-30 22:59:55,887 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 225 flow [2023-08-30 22:59:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2023-08-30 22:59:55,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:55,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:55,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 22:59:55,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-30 22:59:55,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1389580260, now seen corresponding path program 1 times [2023-08-30 22:59:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636823679] [2023-08-30 22:59:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:55,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636823679] [2023-08-30 22:59:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636823679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:55,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:55,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:55,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78213382] [2023-08-30 22:59:55,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:55,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:59:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:59:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:59:55,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 230 [2023-08-30 22:59:55,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-30 22:59:55,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:55,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 230 [2023-08-30 22:59:55,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:56,356 INFO L130 PetriNetUnfolder]: 1961/5599 cut-off events. [2023-08-30 22:59:56,356 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2023-08-30 22:59:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 5599 events. 1961/5599 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 49588 event pairs, 251 based on Foata normal form. 4093/9648 useless extension candidates. Maximal degree in co-relation 11210. Up to 2143 conditions per place. [2023-08-30 22:59:56,389 INFO L137 encePairwiseOnDemand]: 218/230 looper letters, 17 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-08-30 22:59:56,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 290 flow [2023-08-30 22:59:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:59:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:59:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-30 22:59:56,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115942028985507 [2023-08-30 22:59:56,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-30 22:59:56,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-30 22:59:56,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:56,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-30 22:59:56,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-08-30 22:59:56,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-30 22:59:56,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-30 22:59:56,400 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 225 flow. Second operand 3 states and 353 transitions. [2023-08-30 22:59:56,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 290 flow [2023-08-30 22:59:56,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 266 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 22:59:56,409 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 195 flow [2023-08-30 22:59:56,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-30 22:59:56,410 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-30 22:59:56,410 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 195 flow [2023-08-30 22:59:56,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-30 22:59:56,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:56,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 22:59:56,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-30 22:59:56,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash 887309776, now seen corresponding path program 1 times [2023-08-30 22:59:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:56,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615391905] [2023-08-30 22:59:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:56,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615391905] [2023-08-30 22:59:56,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615391905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:59:56,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:59:56,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:59:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839120466] [2023-08-30 22:59:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:59:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:59:56,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:59:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:59:56,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 230 [2023-08-30 22:59:56,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 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) [2023-08-30 22:59:56,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:56,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 230 [2023-08-30 22:59:56,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:57,254 INFO L130 PetriNetUnfolder]: 4684/9857 cut-off events. [2023-08-30 22:59:57,254 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-08-30 22:59:57,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25719 conditions, 9857 events. 4684/9857 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 88047 event pairs, 117 based on Foata normal form. 0/9739 useless extension candidates. Maximal degree in co-relation 25703. Up to 7092 conditions per place. [2023-08-30 22:59:57,297 INFO L137 encePairwiseOnDemand]: 213/230 looper letters, 85 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2023-08-30 22:59:57,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 125 transitions, 705 flow [2023-08-30 22:59:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:59:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:59:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-08-30 22:59:57,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41594202898550725 [2023-08-30 22:59:57,299 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-08-30 22:59:57,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-08-30 22:59:57,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:57,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-08-30 22:59:57,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 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) [2023-08-30 22:59:57,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 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) [2023-08-30 22:59:57,303 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 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) [2023-08-30 22:59:57,303 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 195 flow. Second operand 6 states and 574 transitions. [2023-08-30 22:59:57,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 125 transitions, 705 flow [2023-08-30 22:59:57,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 125 transitions, 674 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:59:57,310 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 392 flow [2023-08-30 22:59:57,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-30 22:59:57,311 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-30 22:59:57,311 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 392 flow [2023-08-30 22:59:57,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 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) [2023-08-30 22:59:57,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:57,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:57,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 22:59:57,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-30 22:59:57,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash 914423267, now seen corresponding path program 2 times [2023-08-30 22:59:57,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:57,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030361835] [2023-08-30 22:59:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:57,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:59:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:57,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:59:57,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030361835] [2023-08-30 22:59:57,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030361835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:59:57,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503187369] [2023-08-30 22:59:57,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:59:57,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:59:57,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:59:57,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:59:57,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 22:59:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:59:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:59:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 22:59:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:59:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:57,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:59:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:59:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503187369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:59:57,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:59:57,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 22:59:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805706084] [2023-08-30 22:59:57,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:59:57,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 22:59:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:59:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 22:59:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 22:59:58,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 230 [2023-08-30 22:59:58,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 392 flow. Second operand has 20 states, 20 states have (on average 80.85) internal successors, (1617), 20 states have internal predecessors, (1617), 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) [2023-08-30 22:59:58,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:59:58,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 230 [2023-08-30 22:59:58,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:59:59,595 INFO L130 PetriNetUnfolder]: 7898/15366 cut-off events. [2023-08-30 22:59:59,596 INFO L131 PetriNetUnfolder]: For 7010/7010 co-relation queries the response was YES. [2023-08-30 22:59:59,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42381 conditions, 15366 events. 7898/15366 cut-off events. For 7010/7010 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 143555 event pairs, 77 based on Foata normal form. 70/15432 useless extension candidates. Maximal degree in co-relation 42360. Up to 8359 conditions per place. [2023-08-30 22:59:59,683 INFO L137 encePairwiseOnDemand]: 208/230 looper letters, 127 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2023-08-30 22:59:59,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 194 transitions, 1251 flow [2023-08-30 22:59:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 22:59:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 22:59:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1027 transitions. [2023-08-30 22:59:59,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059288537549407 [2023-08-30 22:59:59,686 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1027 transitions. [2023-08-30 22:59:59,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1027 transitions. [2023-08-30 22:59:59,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:59:59,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1027 transitions. [2023-08-30 22:59:59,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 93.36363636363636) internal successors, (1027), 11 states have internal predecessors, (1027), 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) [2023-08-30 22:59:59,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 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) [2023-08-30 22:59:59,693 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 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) [2023-08-30 22:59:59,693 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 392 flow. Second operand 11 states and 1027 transitions. [2023-08-30 22:59:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 194 transitions, 1251 flow [2023-08-30 22:59:59,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 194 transitions, 1251 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:59:59,712 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 742 flow [2023-08-30 22:59:59,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=742, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2023-08-30 22:59:59,713 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-08-30 22:59:59,713 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 742 flow [2023-08-30 22:59:59,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 80.85) internal successors, (1617), 20 states have internal predecessors, (1617), 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) [2023-08-30 22:59:59,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:59:59,714 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:59:59,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 22:59:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 22:59:59,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-30 22:59:59,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:59:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1785057498, now seen corresponding path program 1 times [2023-08-30 22:59:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:59:59,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988969485] [2023-08-30 22:59:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:59:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:59:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:59,931 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:59:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:59:59,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:59:59,944 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:59:59,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 22:59:59,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-30 22:59:59,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-08-30 22:59:59,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-30 22:59:59,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-30 22:59:59,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-30 22:59:59,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-30 22:59:59,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-30 22:59:59,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 22:59:59,946 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-30 22:59:59,947 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:59:59,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-30 22:59:59,986 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:59:59,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 196 transitions, 512 flow [2023-08-30 23:00:00,002 INFO L130 PetriNetUnfolder]: 22/195 cut-off events. [2023-08-30 23:00:00,003 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:00:00,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 384 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 230. Up to 14 conditions per place. [2023-08-30 23:00:00,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 196 transitions, 512 flow [2023-08-30 23:00:00,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 125 transitions, 313 flow [2023-08-30 23:00:00,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:00:00,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 125 transitions, 313 flow [2023-08-30 23:00:00,006 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 125 transitions, 313 flow [2023-08-30 23:00:00,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 125 transitions, 313 flow [2023-08-30 23:00:00,021 INFO L130 PetriNetUnfolder]: 22/195 cut-off events. [2023-08-30 23:00:00,021 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 23:00:00,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 383 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 209. Up to 14 conditions per place. [2023-08-30 23:00:00,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 8970 [2023-08-30 23:00:01,130 INFO L134 LiptonReduction]: Checked pairs total: 31391 [2023-08-30 23:00:01,130 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-30 23:00:01,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:00:01,132 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:00:01,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 23:00:01,133 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 23:00:01,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:00:01,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:00:01,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:00:01,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 23:00:01,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:00:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1385291915, now seen corresponding path program 1 times [2023-08-30 23:00:01,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:00:01,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772216532] [2023-08-30 23:00:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:00:01,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:00:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:00:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:00:01,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:00:01,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772216532] [2023-08-30 23:00:01,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772216532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:00:01,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:00:01,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:00:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100714067] [2023-08-30 23:00:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:00:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:00:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:00:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:00:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:00:01,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 262 [2023-08-30 23:00:01,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2023-08-30 23:00:01,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:00:01,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 262 [2023-08-30 23:00:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:41,878 INFO L130 PetriNetUnfolder]: 996393/1206967 cut-off events. [2023-08-30 23:01:41,879 INFO L131 PetriNetUnfolder]: For 309469/309469 co-relation queries the response was YES. [2023-08-30 23:01:48,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2467416 conditions, 1206967 events. 996393/1206967 cut-off events. For 309469/309469 co-relation queries the response was YES. Maximal size of possible extension queue 24579. Compared 7151719 event pairs, 375306 based on Foata normal form. 255/1207217 useless extension candidates. Maximal degree in co-relation 2467401. Up to 1150087 conditions per place. [2023-08-30 23:01:56,496 INFO L137 encePairwiseOnDemand]: 245/262 looper letters, 50 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2023-08-30 23:01:56,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 80 transitions, 382 flow [2023-08-30 23:01:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:01:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:01:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-30 23:01:56,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363867684478374 [2023-08-30 23:01:56,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-30 23:01:56,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-30 23:01:56,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:56,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-30 23:01:56,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 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) [2023-08-30 23:01:56,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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) [2023-08-30 23:01:56,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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) [2023-08-30 23:01:56,503 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 203 flow. Second operand 3 states and 388 transitions. [2023-08-30 23:01:56,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 80 transitions, 382 flow [2023-08-30 23:01:58,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 80 transitions, 331 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:58,229 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 199 flow [2023-08-30 23:01:58,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-08-30 23:01:58,237 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2023-08-30 23:01:58,249 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 199 flow [2023-08-30 23:01:58,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2023-08-30 23:01:58,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:58,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 23:01:58,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 23:01:58,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1895932288, now seen corresponding path program 1 times [2023-08-30 23:01:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:58,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253440389] [2023-08-30 23:01:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:58,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:58,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253440389] [2023-08-30 23:01:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253440389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:58,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:58,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:01:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549533449] [2023-08-30 23:01:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:01:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:01:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:01:58,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 262 [2023-08-30 23:01:58,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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) [2023-08-30 23:01:58,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:58,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 262 [2023-08-30 23:01:58,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:59,236 INFO L130 PetriNetUnfolder]: 3234/10100 cut-off events. [2023-08-30 23:01:59,237 INFO L131 PetriNetUnfolder]: For 1471/1471 co-relation queries the response was YES. [2023-08-30 23:01:59,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18250 conditions, 10100 events. 3234/10100 cut-off events. For 1471/1471 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 101957 event pairs, 700 based on Foata normal form. 7926/17968 useless extension candidates. Maximal degree in co-relation 18233. Up to 3544 conditions per place. [2023-08-30 23:01:59,318 INFO L137 encePairwiseOnDemand]: 248/262 looper letters, 19 selfloop transitions, 14 changer transitions 0/74 dead transitions. [2023-08-30 23:01:59,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 309 flow [2023-08-30 23:01:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:01:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:01:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 23:01:59,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127226463104325 [2023-08-30 23:01:59,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 23:01:59,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 23:01:59,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:59,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 23:01:59,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2023-08-30 23:01:59,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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) [2023-08-30 23:01:59,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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) [2023-08-30 23:01:59,324 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 199 flow. Second operand 3 states and 403 transitions. [2023-08-30 23:01:59,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 309 flow [2023-08-30 23:01:59,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:01:59,331 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 220 flow [2023-08-30 23:01:59,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2023-08-30 23:01:59,332 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2023-08-30 23:01:59,332 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 220 flow [2023-08-30 23:01:59,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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) [2023-08-30 23:01:59,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:59,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:59,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 23:01:59,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 23:01:59,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash 213720413, now seen corresponding path program 1 times [2023-08-30 23:01:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:59,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763571629] [2023-08-30 23:01:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:59,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:59,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:59,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763571629] [2023-08-30 23:01:59,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763571629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:59,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:59,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:01:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286949572] [2023-08-30 23:01:59,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:59,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:01:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:01:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:01:59,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 262 [2023-08-30 23:01:59,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 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) [2023-08-30 23:01:59,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:59,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 262 [2023-08-30 23:01:59,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:01,127 INFO L130 PetriNetUnfolder]: 7970/17047 cut-off events. [2023-08-30 23:02:01,127 INFO L131 PetriNetUnfolder]: For 6719/6719 co-relation queries the response was YES. [2023-08-30 23:02:01,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43828 conditions, 17047 events. 7970/17047 cut-off events. For 6719/6719 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 165300 event pairs, 251 based on Foata normal form. 42/17085 useless extension candidates. Maximal degree in co-relation 43811. Up to 13253 conditions per place. [2023-08-30 23:02:01,289 INFO L137 encePairwiseOnDemand]: 242/262 looper letters, 88 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2023-08-30 23:02:01,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 730 flow [2023-08-30 23:02:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 23:02:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 23:02:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 684 transitions. [2023-08-30 23:02:01,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351145038167939 [2023-08-30 23:02:01,293 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 684 transitions. [2023-08-30 23:02:01,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 684 transitions. [2023-08-30 23:02:01,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:01,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 684 transitions. [2023-08-30 23:02:01,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 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) [2023-08-30 23:02:01,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 262.0) internal successors, (1834), 7 states have internal predecessors, (1834), 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) [2023-08-30 23:02:01,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 262.0) internal successors, (1834), 7 states have internal predecessors, (1834), 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) [2023-08-30 23:02:01,317 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 220 flow. Second operand 6 states and 684 transitions. [2023-08-30 23:02:01,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 730 flow [2023-08-30 23:02:01,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 694 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:02:01,348 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 378 flow [2023-08-30 23:02:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2023-08-30 23:02:01,350 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2023-08-30 23:02:01,350 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 378 flow [2023-08-30 23:02:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 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) [2023-08-30 23:02:01,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:01,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 23:02:01,351 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 23:02:01,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash 628365613, now seen corresponding path program 2 times [2023-08-30 23:02:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926260606] [2023-08-30 23:02:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:01,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:01,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926260606] [2023-08-30 23:02:01,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926260606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:02:01,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946071765] [2023-08-30 23:02:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 23:02:01,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:02:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:02:01,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 23:02:01,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 23:02:01,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 23:02:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 23:02:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 23:02:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:02:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:01,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:02:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:01,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946071765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:02:01,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:02:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 23:02:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819366641] [2023-08-30 23:02:01,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:02:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 23:02:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 23:02:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-30 23:02:02,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 262 [2023-08-30 23:02:02,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 378 flow. Second operand has 20 states, 20 states have (on average 90.85) internal successors, (1817), 20 states have internal predecessors, (1817), 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) [2023-08-30 23:02:02,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:02,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 262 [2023-08-30 23:02:02,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:05,841 INFO L130 PetriNetUnfolder]: 12631/24876 cut-off events. [2023-08-30 23:02:05,841 INFO L131 PetriNetUnfolder]: For 11425/11425 co-relation queries the response was YES. [2023-08-30 23:02:05,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69237 conditions, 24876 events. 12631/24876 cut-off events. For 11425/11425 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 245901 event pairs, 135 based on Foata normal form. 112/24984 useless extension candidates. Maximal degree in co-relation 69215. Up to 15857 conditions per place. [2023-08-30 23:02:06,008 INFO L137 encePairwiseOnDemand]: 236/262 looper letters, 144 selfloop transitions, 55 changer transitions 0/210 dead transitions. [2023-08-30 23:02:06,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 210 transitions, 1337 flow [2023-08-30 23:02:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 23:02:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 23:02:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1168 transitions. [2023-08-30 23:02:06,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40527411519777934 [2023-08-30 23:02:06,011 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1168 transitions. [2023-08-30 23:02:06,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1168 transitions. [2023-08-30 23:02:06,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:06,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1168 transitions. [2023-08-30 23:02:06,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.18181818181819) internal successors, (1168), 11 states have internal predecessors, (1168), 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) [2023-08-30 23:02:06,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 262.0) internal successors, (3144), 12 states have internal predecessors, (3144), 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) [2023-08-30 23:02:06,018 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 262.0) internal successors, (3144), 12 states have internal predecessors, (3144), 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) [2023-08-30 23:02:06,018 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 378 flow. Second operand 11 states and 1168 transitions. [2023-08-30 23:02:06,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 210 transitions, 1337 flow [2023-08-30 23:02:06,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 210 transitions, 1311 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 23:02:06,049 INFO L231 Difference]: Finished difference. Result has 92 places, 114 transitions, 687 flow [2023-08-30 23:02:06,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=687, PETRI_PLACES=92, PETRI_TRANSITIONS=114} [2023-08-30 23:02:06,050 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2023-08-30 23:02:06,050 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 114 transitions, 687 flow [2023-08-30 23:02:06,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.85) internal successors, (1817), 20 states have internal predecessors, (1817), 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) [2023-08-30 23:02:06,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:06,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:06,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 23:02:06,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:02:06,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 23:02:06,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1003347421, now seen corresponding path program 3 times [2023-08-30 23:02:06,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:06,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003452874] [2023-08-30 23:02:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:06,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:06,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003452874] [2023-08-30 23:02:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003452874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:02:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814228963] [2023-08-30 23:02:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 23:02:06,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:02:06,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:02:06,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 23:02:06,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 23:02:06,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 23:02:06,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 23:02:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 23:02:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:02:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:06,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:02:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:06,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814228963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:02:06,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:02:06,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 23:02:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786395936] [2023-08-30 23:02:06,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:02:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 23:02:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 23:02:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-08-30 23:02:07,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 262 [2023-08-30 23:02:07,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 114 transitions, 687 flow. Second operand has 27 states, 27 states have (on average 84.77777777777777) internal successors, (2289), 27 states have internal predecessors, (2289), 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) [2023-08-30 23:02:07,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:07,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 262 [2023-08-30 23:02:07,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:13,659 INFO L130 PetriNetUnfolder]: 28156/54951 cut-off events. [2023-08-30 23:02:13,660 INFO L131 PetriNetUnfolder]: For 47383/47383 co-relation queries the response was YES. [2023-08-30 23:02:13,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176523 conditions, 54951 events. 28156/54951 cut-off events. For 47383/47383 co-relation queries the response was YES. Maximal size of possible extension queue 2084. Compared 591713 event pairs, 121 based on Foata normal form. 720/55667 useless extension candidates. Maximal degree in co-relation 176496. Up to 13310 conditions per place. [2023-08-30 23:02:14,075 INFO L137 encePairwiseOnDemand]: 236/262 looper letters, 135 selfloop transitions, 127 changer transitions 0/272 dead transitions. [2023-08-30 23:02:14,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 272 transitions, 2073 flow [2023-08-30 23:02:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 23:02:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 23:02:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1447 transitions. [2023-08-30 23:02:14,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36819338422391856 [2023-08-30 23:02:14,079 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1447 transitions. [2023-08-30 23:02:14,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1447 transitions. [2023-08-30 23:02:14,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:14,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1447 transitions. [2023-08-30 23:02:14,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 96.46666666666667) internal successors, (1447), 15 states have internal predecessors, (1447), 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) [2023-08-30 23:02:14,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 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) [2023-08-30 23:02:14,088 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 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) [2023-08-30 23:02:14,088 INFO L175 Difference]: Start difference. First operand has 92 places, 114 transitions, 687 flow. Second operand 15 states and 1447 transitions. [2023-08-30 23:02:14,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 272 transitions, 2073 flow [2023-08-30 23:02:14,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 272 transitions, 1975 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-08-30 23:02:14,250 INFO L231 Difference]: Finished difference. Result has 100 places, 161 transitions, 1147 flow [2023-08-30 23:02:14,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1147, PETRI_PLACES=100, PETRI_TRANSITIONS=161} [2023-08-30 23:02:14,250 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2023-08-30 23:02:14,250 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 161 transitions, 1147 flow [2023-08-30 23:02:14,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.77777777777777) internal successors, (2289), 27 states have internal predecessors, (2289), 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) [2023-08-30 23:02:14,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:14,251 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:14,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 23:02:14,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:02:14,457 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-30 23:02:14,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1036802189, now seen corresponding path program 1 times [2023-08-30 23:02:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:14,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746154104] [2023-08-30 23:02:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:14,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:02:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:14,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:02:14,479 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:02:14,479 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 23:02:14,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-08-30 23:02:14,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 9 remaining) [2023-08-30 23:02:14,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-08-30 23:02:14,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-08-30 23:02:14,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-08-30 23:02:14,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-08-30 23:02:14,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-08-30 23:02:14,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-08-30 23:02:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 23:02:14,481 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-08-30 23:02:14,481 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:02:14,481 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-30 23:02:14,513 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:02:14,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 223 transitions, 600 flow [2023-08-30 23:02:14,534 INFO L130 PetriNetUnfolder]: 25/220 cut-off events. [2023-08-30 23:02:14,534 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 23:02:14,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 220 events. 25/220 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 418 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-08-30 23:02:14,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 223 transitions, 600 flow [2023-08-30 23:02:14,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 138 transitions, 356 flow [2023-08-30 23:02:14,538 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:02:14,538 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 138 transitions, 356 flow [2023-08-30 23:02:14,538 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 138 transitions, 356 flow [2023-08-30 23:02:14,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 138 transitions, 356 flow [2023-08-30 23:02:14,554 INFO L130 PetriNetUnfolder]: 25/220 cut-off events. [2023-08-30 23:02:14,554 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 23:02:14,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 220 events. 25/220 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 418 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-30 23:02:14,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 11492 [2023-08-30 23:02:15,561 INFO L134 LiptonReduction]: Checked pairs total: 41081 [2023-08-30 23:02:15,561 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-30 23:02:15,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:02:15,563 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b13c98e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:02:15,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 23:02:15,564 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-08-30 23:02:15,564 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:02:15,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:15,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 23:02:15,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 7 more)] === [2023-08-30 23:02:15,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1691450492, now seen corresponding path program 1 times [2023-08-30 23:02:15,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:15,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856840122] [2023-08-30 23:02:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:15,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:15,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856840122] [2023-08-30 23:02:15,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856840122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:02:15,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:02:15,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:02:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259952249] [2023-08-30 23:02:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:02:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:02:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:02:15,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:02:15,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 294 [2023-08-30 23:02:15,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-30 23:02:15,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:15,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 294 [2023-08-30 23:02:15,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand