./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/weaver/chl-nzb-file-symm.wvr.c -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 b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:11:21,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:11:21,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:11:21,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:11:21,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:11:21,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:11:21,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:11:21,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:11:21,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:11:21,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:11:21,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:11:21,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:11:21,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:11:21,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:11:21,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:11:21,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:11:21,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:11:21,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:11:21,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:11:21,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:11:21,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:11:21,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:11:21,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:11:21,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:11:21,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:11:21,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:11:21,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:11:21,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:11:21,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:11:21,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:11:21,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:11:21,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:11:21,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:11:21,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:11:21,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:11:21,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:11:21,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:11:21,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:11:21,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:11:21,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:11:21,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:11:21,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:11:21,551 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:11:21,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:11:21,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:11:21,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:11:21,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:11:21,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:11:21,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:11:21,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:11:21,554 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:11:21,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:11:21,555 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:11:21,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:11:21,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:11:21,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:11:21,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:11:21,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:11:21,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:11:21,557 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:11:21,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:11:21,557 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:11:21,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:11:21,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:11:21,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:11:21,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:11:21,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:11:21,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:11:21,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:11:21,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:11:21,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:11:21,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:11:21,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:11:21,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:11:21,560 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:11:21,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:11:21,560 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:11:21,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b869eaba59e8dca8d7cb2d1135193e506b8377811cada7a7f67b6d0824dd2d3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:11:21,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:11:21,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:11:21,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:11:21,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:11:21,899 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:11:21,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-09-01 12:11:23,020 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:11:23,265 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:11:23,266 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c [2023-09-01 12:11:23,276 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4da8bd1/75d4e43e2570437ea523c8a1e0f8c4bb/FLAGfbadabd86 [2023-09-01 12:11:23,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4da8bd1/75d4e43e2570437ea523c8a1e0f8c4bb [2023-09-01 12:11:23,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:11:23,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:11:23,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:11:23,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:11:23,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:11:23,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fec3c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23, skipping insertion in model container [2023-09-01 12:11:23,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:11:23,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:11:23,546 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-09-01 12:11:23,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:11:23,572 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:11:23,614 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-symm.wvr.c[4929,4942] [2023-09-01 12:11:23,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:11:23,644 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:11:23,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23 WrapperNode [2023-09-01 12:11:23,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:11:23,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:11:23,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:11:23,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:11:23,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,715 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 406 [2023-09-01 12:11:23,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:11:23,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:11:23,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:11:23,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:11:23,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:11:23,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:11:23,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:11:23,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:11:23,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (1/1) ... [2023-09-01 12:11:23,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:11:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:11:23,834 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) [2023-09-01 12:11:23,839 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 [2023-09-01 12:11:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:11:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:11:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:11:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:11:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:11:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:11:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:11:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:11:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:11:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:11:23,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:11:23,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:11:23,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:11:23,864 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:11:23,960 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:11:23,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:11:24,601 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:11:24,612 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:11:24,613 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 12:11:24,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:11:24 BoogieIcfgContainer [2023-09-01 12:11:24,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:11:24,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:11:24,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:11:24,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:11:24,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:11:23" (1/3) ... [2023-09-01 12:11:24,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5168303a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:11:24, skipping insertion in model container [2023-09-01 12:11:24,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:11:23" (2/3) ... [2023-09-01 12:11:24,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5168303a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:11:24, skipping insertion in model container [2023-09-01 12:11:24,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:11:24" (3/3) ... [2023-09-01 12:11:24,623 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2023-09-01 12:11:24,630 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:11:24,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:11:24,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:11:24,639 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:11:24,751 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:11:24,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 443 places, 485 transitions, 986 flow [2023-09-01 12:11:24,938 INFO L130 PetriNetUnfolder]: 49/483 cut-off events. [2023-09-01 12:11:24,939 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:11:24,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 483 events. 49/483 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1351 event pairs, 0 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 323. Up to 2 conditions per place. [2023-09-01 12:11:24,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 443 places, 485 transitions, 986 flow [2023-09-01 12:11:24,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 433 places, 475 transitions, 962 flow [2023-09-01 12:11:24,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:11:24,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 433 places, 475 transitions, 962 flow [2023-09-01 12:11:24,974 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 433 places, 475 transitions, 962 flow [2023-09-01 12:11:24,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 433 places, 475 transitions, 962 flow [2023-09-01 12:11:25,074 INFO L130 PetriNetUnfolder]: 49/475 cut-off events. [2023-09-01 12:11:25,075 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:11:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 475 events. 49/475 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1318 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 323. Up to 2 conditions per place. [2023-09-01 12:11:25,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 53352 [2023-09-01 12:11:44,590 INFO L134 LiptonReduction]: Checked pairs total: 50280 [2023-09-01 12:11:44,591 INFO L136 LiptonReduction]: Total number of compositions: 621 [2023-09-01 12:11:44,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:11:44,608 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;@2e2ab1ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:11:44,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:11:44,618 INFO L130 PetriNetUnfolder]: 7/28 cut-off events. [2023-09-01 12:11:44,618 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:11:44,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:44,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:44,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:44,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash -36243124, now seen corresponding path program 1 times [2023-09-01 12:11:44,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:44,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212752279] [2023-09-01 12:11:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:44,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:11:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212752279] [2023-09-01 12:11:45,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212752279] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:45,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:11:45,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:11:45,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682073446] [2023-09-01 12:11:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:45,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:11:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:11:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:11:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 1106 [2023-09-01 12:11:45,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 451.3333333333333) internal successors, (1354), 3 states have internal predecessors, (1354), 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) [2023-09-01 12:11:45,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:45,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 1106 [2023-09-01 12:11:45,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:45,258 INFO L130 PetriNetUnfolder]: 157/250 cut-off events. [2023-09-01 12:11:45,258 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 12:11:45,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 250 events. 157/250 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 638 event pairs, 87 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 472. Up to 249 conditions per place. [2023-09-01 12:11:45,261 INFO L137 encePairwiseOnDemand]: 1101/1106 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-09-01 12:11:45,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 136 flow [2023-09-01 12:11:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:11:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:11:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1374 transitions. [2023-09-01 12:11:45,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2023-09-01 12:11:45,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1374 transitions. [2023-09-01 12:11:45,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1374 transitions. [2023-09-01 12:11:45,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:45,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1374 transitions. [2023-09-01 12:11:45,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 458.0) internal successors, (1374), 3 states have internal predecessors, (1374), 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) [2023-09-01 12:11:45,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:45,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:45,324 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 70 flow. Second operand 3 states and 1374 transitions. [2023-09-01 12:11:45,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 136 flow [2023-09-01 12:11:45,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:11:45,328 INFO L231 Difference]: Finished difference. Result has 28 places, 31 transitions, 84 flow [2023-09-01 12:11:45,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=31} [2023-09-01 12:11:45,333 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-09-01 12:11:45,333 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 31 transitions, 84 flow [2023-09-01 12:11:45,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 451.3333333333333) internal successors, (1354), 3 states have internal predecessors, (1354), 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) [2023-09-01 12:11:45,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:45,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:45,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:11:45,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:45,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash -119955902, now seen corresponding path program 1 times [2023-09-01 12:11:45,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:45,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976384356] [2023-09-01 12:11:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:45,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:11:45,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:45,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976384356] [2023-09-01 12:11:45,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976384356] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:11:45,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678851339] [2023-09-01 12:11:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:45,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:11:45,481 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) [2023-09-01 12:11:45,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:11:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:11:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:11:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:11:45,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:11:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:11:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678851339] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:11:45,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:11:45,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-09-01 12:11:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215837850] [2023-09-01 12:11:45,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:11:45,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:11:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:11:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:11:45,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 443 out of 1106 [2023-09-01 12:11:45,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 445.875) internal successors, (3567), 8 states have internal predecessors, (3567), 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) [2023-09-01 12:11:45,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:45,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 443 of 1106 [2023-09-01 12:11:45,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:46,057 INFO L130 PetriNetUnfolder]: 157/256 cut-off events. [2023-09-01 12:11:46,058 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:11:46,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 256 events. 157/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 642 event pairs, 87 based on Foata normal form. 3/190 useless extension candidates. Maximal degree in co-relation 512. Up to 249 conditions per place. [2023-09-01 12:11:46,060 INFO L137 encePairwiseOnDemand]: 1101/1106 looper letters, 27 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2023-09-01 12:11:46,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 182 flow [2023-09-01 12:11:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:11:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:11:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2701 transitions. [2023-09-01 12:11:46,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40702230259192285 [2023-09-01 12:11:46,067 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2701 transitions. [2023-09-01 12:11:46,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2701 transitions. [2023-09-01 12:11:46,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:46,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2701 transitions. [2023-09-01 12:11:46,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 450.1666666666667) internal successors, (2701), 6 states have internal predecessors, (2701), 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) [2023-09-01 12:11:46,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1106.0) internal successors, (7742), 7 states have internal predecessors, (7742), 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) [2023-09-01 12:11:46,088 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1106.0) internal successors, (7742), 7 states have internal predecessors, (7742), 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) [2023-09-01 12:11:46,088 INFO L175 Difference]: Start difference. First operand has 28 places, 31 transitions, 84 flow. Second operand 6 states and 2701 transitions. [2023-09-01 12:11:46,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 182 flow [2023-09-01 12:11:46,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:11:46,090 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 146 flow [2023-09-01 12:11:46,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2023-09-01 12:11:46,091 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-09-01 12:11:46,092 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 146 flow [2023-09-01 12:11:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 445.875) internal successors, (3567), 8 states have internal predecessors, (3567), 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) [2023-09-01 12:11:46,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:46,094 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:46,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:11:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:46,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:46,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1905448366, now seen corresponding path program 2 times [2023-09-01 12:11:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860724866] [2023-09-01 12:11:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 12:11:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860724866] [2023-09-01 12:11:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860724866] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:11:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956603180] [2023-09-01 12:11:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:11:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:46,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:11:46,523 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) [2023-09-01 12:11:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:11:46,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:11:46,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:11:46,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:11:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:11:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:11:47,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:11:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956603180] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:11:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-09-01 12:11:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190090983] [2023-09-01 12:11:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:47,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:11:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:11:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:11:47,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 433 out of 1106 [2023-09-01 12:11:47,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 436.75) internal successors, (1747), 4 states have internal predecessors, (1747), 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) [2023-09-01 12:11:47,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:47,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 433 of 1106 [2023-09-01 12:11:47,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:47,797 INFO L130 PetriNetUnfolder]: 165/285 cut-off events. [2023-09-01 12:11:47,797 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:11:47,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 285 events. 165/285 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 853 event pairs, 87 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 562. Up to 249 conditions per place. [2023-09-01 12:11:47,800 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 43 selfloop transitions, 1 changer transitions 7/51 dead transitions. [2023-09-01 12:11:47,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 51 transitions, 281 flow [2023-09-01 12:11:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:11:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:11:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1777 transitions. [2023-09-01 12:11:47,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016726943942134 [2023-09-01 12:11:47,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1777 transitions. [2023-09-01 12:11:47,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1777 transitions. [2023-09-01 12:11:47,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:47,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1777 transitions. [2023-09-01 12:11:47,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 444.25) internal successors, (1777), 4 states have internal predecessors, (1777), 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) [2023-09-01 12:11:47,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-09-01 12:11:47,820 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-09-01 12:11:47,820 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 146 flow. Second operand 4 states and 1777 transitions. [2023-09-01 12:11:47,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 51 transitions, 281 flow [2023-09-01 12:11:47,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 265 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 12:11:47,824 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 139 flow [2023-09-01 12:11:47,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-09-01 12:11:47,825 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-09-01 12:11:47,826 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 139 flow [2023-09-01 12:11:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 436.75) internal successors, (1747), 4 states have internal predecessors, (1747), 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) [2023-09-01 12:11:47,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:47,827 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:47,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:11:48,033 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,SelfDestructingSolverStorable2 [2023-09-01 12:11:48,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:48,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1267452706, now seen corresponding path program 3 times [2023-09-01 12:11:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:48,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957297269] [2023-09-01 12:11:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:48,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 12:11:48,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:48,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957297269] [2023-09-01 12:11:48,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957297269] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:11:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309554923] [2023-09-01 12:11:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:11:48,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:11:48,186 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) [2023-09-01 12:11:48,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:11:48,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:11:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:11:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:11:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:11:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 12:11:48,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:11:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309554923] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:48,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:11:48,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-09-01 12:11:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244416423] [2023-09-01 12:11:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:11:48,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:11:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:11:48,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 433 out of 1106 [2023-09-01 12:11:48,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 436.75) internal successors, (1747), 4 states have internal predecessors, (1747), 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) [2023-09-01 12:11:48,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:48,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 433 of 1106 [2023-09-01 12:11:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:49,212 INFO L130 PetriNetUnfolder]: 173/317 cut-off events. [2023-09-01 12:11:49,213 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-09-01 12:11:49,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 317 events. 173/317 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1087 event pairs, 96 based on Foata normal form. 3/251 useless extension candidates. Maximal degree in co-relation 720. Up to 256 conditions per place. [2023-09-01 12:11:49,215 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 51 selfloop transitions, 1 changer transitions 5/57 dead transitions. [2023-09-01 12:11:49,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 302 flow [2023-09-01 12:11:49,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:11:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:11:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1783 transitions. [2023-09-01 12:11:49,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030289330922242 [2023-09-01 12:11:49,220 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1783 transitions. [2023-09-01 12:11:49,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1783 transitions. [2023-09-01 12:11:49,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:49,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1783 transitions. [2023-09-01 12:11:49,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 445.75) internal successors, (1783), 4 states have internal predecessors, (1783), 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) [2023-09-01 12:11:49,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-09-01 12:11:49,234 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1106.0) internal successors, (5530), 5 states have internal predecessors, (5530), 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) [2023-09-01 12:11:49,234 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 139 flow. Second operand 4 states and 1783 transitions. [2023-09-01 12:11:49,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 302 flow [2023-09-01 12:11:49,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:11:49,238 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 145 flow [2023-09-01 12:11:49,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-09-01 12:11:49,239 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-09-01 12:11:49,239 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 145 flow [2023-09-01 12:11:49,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 436.75) internal successors, (1747), 4 states have internal predecessors, (1747), 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) [2023-09-01 12:11:49,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:49,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:49,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:11:49,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:49,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:49,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash 620058531, now seen corresponding path program 1 times [2023-09-01 12:11:49,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:49,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463740071] [2023-09-01 12:11:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:49,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 12:11:49,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:49,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463740071] [2023-09-01 12:11:49,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463740071] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:11:49,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814891481] [2023-09-01 12:11:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:49,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:49,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:11:49,571 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) [2023-09-01 12:11:49,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:11:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:11:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:11:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 12:11:49,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:11:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 12:11:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814891481] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:11:49,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:11:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 12:11:49,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001562494] [2023-09-01 12:11:49,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:11:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:11:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:49,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:11:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:11:49,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 443 out of 1106 [2023-09-01 12:11:49,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 145 flow. Second operand has 13 states, 13 states have (on average 445.0769230769231) internal successors, (5786), 13 states have internal predecessors, (5786), 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) [2023-09-01 12:11:49,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:49,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 443 of 1106 [2023-09-01 12:11:49,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:50,067 INFO L130 PetriNetUnfolder]: 172/313 cut-off events. [2023-09-01 12:11:50,068 INFO L131 PetriNetUnfolder]: For 172/172 co-relation queries the response was YES. [2023-09-01 12:11:50,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 313 events. 172/313 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1002 event pairs, 124 based on Foata normal form. 1/267 useless extension candidates. Maximal degree in co-relation 752. Up to 304 conditions per place. [2023-09-01 12:11:50,069 INFO L137 encePairwiseOnDemand]: 1101/1106 looper letters, 27 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2023-09-01 12:11:50,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 235 flow [2023-09-01 12:11:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:11:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:11:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3142 transitions. [2023-09-01 12:11:50,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405838284680961 [2023-09-01 12:11:50,078 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3142 transitions. [2023-09-01 12:11:50,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3142 transitions. [2023-09-01 12:11:50,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:50,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3142 transitions. [2023-09-01 12:11:50,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 448.85714285714283) internal successors, (3142), 7 states have internal predecessors, (3142), 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) [2023-09-01 12:11:50,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1106.0) internal successors, (8848), 8 states have internal predecessors, (8848), 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) [2023-09-01 12:11:50,097 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1106.0) internal successors, (8848), 8 states have internal predecessors, (8848), 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) [2023-09-01 12:11:50,097 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 145 flow. Second operand 7 states and 3142 transitions. [2023-09-01 12:11:50,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 235 flow [2023-09-01 12:11:50,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 232 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:11:50,099 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 188 flow [2023-09-01 12:11:50,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-09-01 12:11:50,100 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-09-01 12:11:50,100 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 188 flow [2023-09-01 12:11:50,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 445.0769230769231) internal successors, (5786), 13 states have internal predecessors, (5786), 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) [2023-09-01 12:11:50,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:50,102 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:50,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:11:50,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:50,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:50,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:50,309 INFO L85 PathProgramCache]: Analyzing trace with hash -856671419, now seen corresponding path program 2 times [2023-09-01 12:11:50,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:50,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243415521] [2023-09-01 12:11:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:11:50,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:50,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243415521] [2023-09-01 12:11:50,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243415521] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:50,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:11:50,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:11:50,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886235080] [2023-09-01 12:11:50,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:50,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:11:50,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:11:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:11:50,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 1106 [2023-09-01 12:11:50,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 453.3333333333333) internal successors, (1360), 3 states have internal predecessors, (1360), 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) [2023-09-01 12:11:50,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:50,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 1106 [2023-09-01 12:11:50,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:50,757 INFO L130 PetriNetUnfolder]: 211/378 cut-off events. [2023-09-01 12:11:50,757 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2023-09-01 12:11:50,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 378 events. 211/378 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1308 event pairs, 124 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 846. Up to 318 conditions per place. [2023-09-01 12:11:50,760 INFO L137 encePairwiseOnDemand]: 1103/1106 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-09-01 12:11:50,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 337 flow [2023-09-01 12:11:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:11:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:11:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1390 transitions. [2023-09-01 12:11:50,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41892706449668476 [2023-09-01 12:11:50,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1390 transitions. [2023-09-01 12:11:50,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1390 transitions. [2023-09-01 12:11:50,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:50,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1390 transitions. [2023-09-01 12:11:50,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 463.3333333333333) internal successors, (1390), 3 states have internal predecessors, (1390), 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) [2023-09-01 12:11:50,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:50,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:50,776 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 188 flow. Second operand 3 states and 1390 transitions. [2023-09-01 12:11:50,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 337 flow [2023-09-01 12:11:50,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 313 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 12:11:50,780 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 176 flow [2023-09-01 12:11:50,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-09-01 12:11:50,783 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-09-01 12:11:50,783 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 176 flow [2023-09-01 12:11:50,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 453.3333333333333) internal successors, (1360), 3 states have internal predecessors, (1360), 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) [2023-09-01 12:11:50,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:50,784 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:50,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:11:50,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:50,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -260660010, now seen corresponding path program 1 times [2023-09-01 12:11:50,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:50,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881536707] [2023-09-01 12:11:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:11:50,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881536707] [2023-09-01 12:11:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881536707] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:50,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:11:50,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:11:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204011275] [2023-09-01 12:11:50,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:50,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:11:50,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:11:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:11:50,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 1106 [2023-09-01 12:11:50,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 453.3333333333333) internal successors, (1360), 3 states have internal predecessors, (1360), 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) [2023-09-01 12:11:50,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:50,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 1106 [2023-09-01 12:11:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:51,182 INFO L130 PetriNetUnfolder]: 325/564 cut-off events. [2023-09-01 12:11:51,182 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2023-09-01 12:11:51,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 564 events. 325/564 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2003 event pairs, 167 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 1446. Up to 393 conditions per place. [2023-09-01 12:11:51,185 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 52 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-09-01 12:11:51,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 333 flow [2023-09-01 12:11:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:11:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:11:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1388 transitions. [2023-09-01 12:11:51,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41832429174201324 [2023-09-01 12:11:51,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1388 transitions. [2023-09-01 12:11:51,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1388 transitions. [2023-09-01 12:11:51,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:51,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1388 transitions. [2023-09-01 12:11:51,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 462.6666666666667) internal successors, (1388), 3 states have internal predecessors, (1388), 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) [2023-09-01 12:11:51,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:51,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:51,199 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 176 flow. Second operand 3 states and 1388 transitions. [2023-09-01 12:11:51,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 333 flow [2023-09-01 12:11:51,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 325 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 12:11:51,201 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 191 flow [2023-09-01 12:11:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-09-01 12:11:51,202 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-09-01 12:11:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 191 flow [2023-09-01 12:11:51,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 453.3333333333333) internal successors, (1360), 3 states have internal predecessors, (1360), 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) [2023-09-01 12:11:51,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:51,203 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:11:51,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:51,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash -574296751, now seen corresponding path program 1 times [2023-09-01 12:11:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067043234] [2023-09-01 12:11:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 12:11:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067043234] [2023-09-01 12:11:51,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067043234] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:11:51,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:11:51,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:11:51,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046681545] [2023-09-01 12:11:51,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:11:51,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:11:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:11:51,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:11:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:11:51,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 1106 [2023-09-01 12:11:51,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 454.6666666666667) internal successors, (1364), 3 states have internal predecessors, (1364), 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) [2023-09-01 12:11:51,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:11:51,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 1106 [2023-09-01 12:11:51,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:51,813 INFO L130 PetriNetUnfolder]: 259/450 cut-off events. [2023-09-01 12:11:51,814 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-09-01 12:11:51,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 450 events. 259/450 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1415 event pairs, 94 based on Foata normal form. 38/434 useless extension candidates. Maximal degree in co-relation 1138. Up to 419 conditions per place. [2023-09-01 12:11:51,817 INFO L137 encePairwiseOnDemand]: 1102/1106 looper letters, 43 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2023-09-01 12:11:51,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 314 flow [2023-09-01 12:11:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:11:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:11:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1385 transitions. [2023-09-01 12:11:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41742013261000604 [2023-09-01 12:11:51,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1385 transitions. [2023-09-01 12:11:51,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1385 transitions. [2023-09-01 12:11:51,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:51,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1385 transitions. [2023-09-01 12:11:51,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 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) [2023-09-01 12:11:51,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:51,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1106.0) internal successors, (4424), 4 states have internal predecessors, (4424), 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) [2023-09-01 12:11:51,830 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 191 flow. Second operand 3 states and 1385 transitions. [2023-09-01 12:11:51,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 314 flow [2023-09-01 12:11:51,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:11:51,832 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 198 flow [2023-09-01 12:11:51,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1106, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-09-01 12:11:51,833 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-09-01 12:11:51,833 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 198 flow [2023-09-01 12:11:51,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 454.6666666666667) internal successors, (1364), 3 states have internal predecessors, (1364), 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) [2023-09-01 12:11:51,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:11:51,834 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:11:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:11:51,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:11:51,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:11:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash 736481309, now seen corresponding path program 1 times [2023-09-01 12:11:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:11:51,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828596901] [2023-09-01 12:11:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:51,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:11:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:11:56,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:11:56,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828596901] [2023-09-01 12:11:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828596901] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:11:56,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562894863] [2023-09-01 12:11:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:11:56,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:11:56,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:11:56,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:11:56,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:11:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:11:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 12:11:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:11:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:11:57,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:13:13,910 WARN L222 SmtUtils]: Spent 1.19m on a formula simplification. DAG size of input: 93 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:13:19,463 WARN L222 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 701 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-09-01 12:13:19,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:13:19,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 364 treesize of output 2174 Killed by 15