./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/clever.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/clever.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 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --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 12:26:44,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:26:44,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:26:44,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:26:44,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:26:44,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:26:44,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:26:44,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:26:44,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:26:44,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:26:44,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:26:44,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:26:44,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:26:44,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:26:44,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:26:44,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:26:44,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:26:44,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:26:44,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:26:44,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:26:44,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:26:44,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:26:44,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:26:44,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:26:44,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:26:44,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:26:44,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:26:44,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:26:44,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:26:44,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:26:44,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:26:44,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:26:44,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:26:44,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:26:44,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:26:44,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:26:44,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:26:44,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:26:44,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:26:44,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:26:44,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:26:44,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:26:44,610 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:26:44,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:26:44,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:26:44,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:26:44,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:26:44,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:26:44,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:26:44,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:26:44,613 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:26:44,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:26:44,614 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:26:44,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:26:44,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:26:44,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:26:44,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:26:44,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:26:44,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:26:44,615 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:26:44,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:26:44,615 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:26:44,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:26:44,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:26:44,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:26:44,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:26:44,617 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:26:44,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:26:44,617 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:26:44,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:26:44,617 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:26:44,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:26:44,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:26:44,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:26:44,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:26:44,849 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:26:44,850 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:26:44,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-09-01 12:26:45,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:26:46,001 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:26:46,002 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-09-01 12:26:46,010 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45507b9f/21b2a302d36e4c6a9a28454ab3d59cdb/FLAGeff881c87 [2023-09-01 12:26:46,018 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45507b9f/21b2a302d36e4c6a9a28454ab3d59cdb [2023-09-01 12:26:46,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:26:46,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:26:46,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:26:46,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:26:46,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:26:46,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1039bed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46, skipping insertion in model container [2023-09-01 12:26:46,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:26:46,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:26:46,137 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/clever.wvr.c[2133,2146] [2023-09-01 12:26:46,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:26:46,145 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:26:46,157 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/clever.wvr.c[2133,2146] [2023-09-01 12:26:46,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:26:46,166 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:26:46,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46 WrapperNode [2023-09-01 12:26:46,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:26:46,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:26:46,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:26:46,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:26:46,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,208 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-09-01 12:26:46,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:26:46,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:26:46,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:26:46,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:26:46,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:26:46,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:26:46,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:26:46,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:26:46,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (1/1) ... [2023-09-01 12:26:46,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:26:46,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:26:46,270 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 12:26:46,288 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 12:26:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:26:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:26:46,297 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:26:46,297 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:26:46,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:26:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:26:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:26:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:26:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:26:46,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:26:46,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:26:46,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:26:46,299 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 12:26:46,410 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:26:46,420 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:26:46,570 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:26:46,575 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:26:46,575 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 12:26:46,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:26:46 BoogieIcfgContainer [2023-09-01 12:26:46,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:26:46,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:26:46,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:26:46,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:26:46,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:26:46" (1/3) ... [2023-09-01 12:26:46,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce3bc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:26:46, skipping insertion in model container [2023-09-01 12:26:46,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:26:46" (2/3) ... [2023-09-01 12:26:46,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce3bc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:26:46, skipping insertion in model container [2023-09-01 12:26:46,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:26:46" (3/3) ... [2023-09-01 12:26:46,582 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-09-01 12:26:46,593 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:26:46,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:26:46,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:26:46,600 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:26:46,673 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:26:46,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2023-09-01 12:26:46,775 INFO L130 PetriNetUnfolder]: 9/117 cut-off events. [2023-09-01 12:26:46,776 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:26:46,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-09-01 12:26:46,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2023-09-01 12:26:46,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2023-09-01 12:26:46,787 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:26:46,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 109 transitions, 230 flow [2023-09-01 12:26:46,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 109 transitions, 230 flow [2023-09-01 12:26:46,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 230 flow [2023-09-01 12:26:46,833 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-09-01 12:26:46,833 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:26:46,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-09-01 12:26:46,835 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-09-01 12:26:49,522 INFO L134 LiptonReduction]: Checked pairs total: 744 [2023-09-01 12:26:49,522 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-09-01 12:26:49,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:26:49,534 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;@4017f25e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:26:49,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:26:49,537 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-09-01 12:26:49,537 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:26:49,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:49,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:49,538 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 12:26:49,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -259219510, now seen corresponding path program 1 times [2023-09-01 12:26:49,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:49,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848272337] [2023-09-01 12:26:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:49,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:49,821 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 12:26:49,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:49,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848272337] [2023-09-01 12:26:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848272337] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:26:49,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:26:49,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 12:26:49,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985467404] [2023-09-01 12:26:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:26:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:26:49,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:49,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:26:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:26:49,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 224 [2023-09-01 12:26:49,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 12:26:49,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:49,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 224 [2023-09-01 12:26:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:49,929 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2023-09-01 12:26:49,929 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 12:26:49,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 117 events. 69/117 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-09-01 12:26:49,931 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-09-01 12:26:49,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 27 transitions, 129 flow [2023-09-01 12:26:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:26:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:26:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-09-01 12:26:49,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2023-09-01 12:26:49,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-09-01 12:26:49,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-09-01 12:26:49,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:49,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-09-01 12:26:49,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 12:26:49,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 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 12:26:49,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 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 12:26:49,971 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 334 transitions. [2023-09-01 12:26:49,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 27 transitions, 129 flow [2023-09-01 12:26:49,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:26:49,974 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 53 flow [2023-09-01 12:26:49,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-09-01 12:26:49,977 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-09-01 12:26:49,978 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 53 flow [2023-09-01 12:26:49,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 12:26:49,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:49,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:49,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:26:49,979 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 12:26:49,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1272176076, now seen corresponding path program 1 times [2023-09-01 12:26:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:49,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261106242] [2023-09-01 12:26:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:50,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:50,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261106242] [2023-09-01 12:26:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261106242] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:26:50,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:26:50,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:26:50,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035903986] [2023-09-01 12:26:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:26:50,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:26:50,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:26:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:26:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-09-01 12:26:50,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 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 12:26:50,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:50,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-09-01 12:26:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:50,207 INFO L130 PetriNetUnfolder]: 121/217 cut-off events. [2023-09-01 12:26:50,207 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 12:26:50,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 217 events. 121/217 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 688 event pairs, 18 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 201. Up to 130 conditions per place. [2023-09-01 12:26:50,209 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 35 selfloop transitions, 6 changer transitions 8/49 dead transitions. [2023-09-01 12:26:50,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 49 transitions, 243 flow [2023-09-01 12:26:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:26:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:26:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-09-01 12:26:50,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2023-09-01 12:26:50,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-09-01 12:26:50,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-09-01 12:26:50,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:50,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-09-01 12:26:50,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 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 12:26:50,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:26:50,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:26:50,215 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 53 flow. Second operand 5 states and 535 transitions. [2023-09-01 12:26:50,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 49 transitions, 243 flow [2023-09-01 12:26:50,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 49 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:26:50,216 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 99 flow [2023-09-01 12:26:50,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-09-01 12:26:50,217 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-09-01 12:26:50,217 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 99 flow [2023-09-01 12:26:50,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 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 12:26:50,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:50,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:50,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:26:50,218 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 12:26:50,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1400720826, now seen corresponding path program 2 times [2023-09-01 12:26:50,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:50,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710949045] [2023-09-01 12:26:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:50,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:50,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710949045] [2023-09-01 12:26:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710949045] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:26:50,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:26:50,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:26:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714186833] [2023-09-01 12:26:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:26:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:26:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:26:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:26:50,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-09-01 12:26:50,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 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 12:26:50,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:50,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-09-01 12:26:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:50,376 INFO L130 PetriNetUnfolder]: 110/185 cut-off events. [2023-09-01 12:26:50,377 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-09-01 12:26:50,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 185 events. 110/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 14 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 190. Up to 128 conditions per place. [2023-09-01 12:26:50,381 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 29 selfloop transitions, 7 changer transitions 5/41 dead transitions. [2023-09-01 12:26:50,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 247 flow [2023-09-01 12:26:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:26:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:26:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 529 transitions. [2023-09-01 12:26:50,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232142857142856 [2023-09-01 12:26:50,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 529 transitions. [2023-09-01 12:26:50,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 529 transitions. [2023-09-01 12:26:50,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:50,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 529 transitions. [2023-09-01 12:26:50,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 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 12:26:50,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:26:50,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:26:50,386 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 99 flow. Second operand 5 states and 529 transitions. [2023-09-01 12:26:50,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 247 flow [2023-09-01 12:26:50,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:26:50,388 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 127 flow [2023-09-01 12:26:50,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-09-01 12:26:50,389 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-09-01 12:26:50,391 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 127 flow [2023-09-01 12:26:50,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 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 12:26:50,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:50,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:50,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:26:50,392 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 12:26:50,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1139161799, now seen corresponding path program 1 times [2023-09-01 12:26:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:50,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545499155] [2023-09-01 12:26:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:50,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:50,443 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 12:26:50,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:50,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545499155] [2023-09-01 12:26:50,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545499155] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:26:50,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813070761] [2023-09-01 12:26:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:50,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:26:50,447 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 12:26:50,465 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 12:26:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 12:26:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:26:50,577 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 12:26:50,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:26:50,612 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 12:26:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813070761] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:26:50,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:26:50,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-09-01 12:26:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545381906] [2023-09-01 12:26:50,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:26:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:26:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:26:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:26:50,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:26:50,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 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 12:26:50,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:50,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:26:50,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:50,725 INFO L130 PetriNetUnfolder]: 108/175 cut-off events. [2023-09-01 12:26:50,725 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-09-01 12:26:50,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 175 events. 108/175 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 466 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 289. Up to 91 conditions per place. [2023-09-01 12:26:50,727 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-09-01 12:26:50,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 264 flow [2023-09-01 12:26:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:26:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:26:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-09-01 12:26:50,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-09-01 12:26:50,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-09-01 12:26:50,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-09-01 12:26:50,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:50,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-09-01 12:26:50,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:26:50,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:26:50,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:26:50,732 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 127 flow. Second operand 5 states and 515 transitions. [2023-09-01 12:26:50,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 264 flow [2023-09-01 12:26:50,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 252 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:26:50,734 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 144 flow [2023-09-01 12:26:50,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-09-01 12:26:50,734 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2023-09-01 12:26:50,742 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 144 flow [2023-09-01 12:26:50,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 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 12:26:50,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:50,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:50,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 12:26:50,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:50,944 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 12:26:50,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1197066339, now seen corresponding path program 1 times [2023-09-01 12:26:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:50,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779734948] [2023-09-01 12:26:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:51,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:51,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779734948] [2023-09-01 12:26:51,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779734948] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:26:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873448487] [2023-09-01 12:26:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:26:51,209 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 12:26:51,234 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 12:26:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:26:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:26:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:55,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:26:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:55,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873448487] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:26:55,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:26:55,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 12:26:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289554199] [2023-09-01 12:26:55,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:26:56,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:26:56,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:26:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=108, Unknown=2, NotChecked=0, Total=156 [2023-09-01 12:26:56,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-09-01 12:26:56,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 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 12:26:56,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:56,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-09-01 12:26:56,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:56,875 INFO L130 PetriNetUnfolder]: 260/427 cut-off events. [2023-09-01 12:26:56,876 INFO L131 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2023-09-01 12:26:56,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 427 events. 260/427 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1514 event pairs, 18 based on Foata normal form. 10/437 useless extension candidates. Maximal degree in co-relation 598. Up to 221 conditions per place. [2023-09-01 12:26:56,878 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 55 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2023-09-01 12:26:56,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 89 transitions, 618 flow [2023-09-01 12:26:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:26:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:26:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 915 transitions. [2023-09-01 12:26:56,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848214285714285 [2023-09-01 12:26:56,880 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 915 transitions. [2023-09-01 12:26:56,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 915 transitions. [2023-09-01 12:26:56,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:56,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 915 transitions. [2023-09-01 12:26:56,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.5) internal successors, (915), 10 states have internal predecessors, (915), 0 states have call successors, (0), 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 12:26:56,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 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 12:26:56,885 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 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 12:26:56,885 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 144 flow. Second operand 10 states and 915 transitions. [2023-09-01 12:26:56,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 89 transitions, 618 flow [2023-09-01 12:26:56,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 89 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 12:26:56,888 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 307 flow [2023-09-01 12:26:56,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-09-01 12:26:56,889 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2023-09-01 12:26:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 307 flow [2023-09-01 12:26:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 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 12:26:56,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:56,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:56,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 12:26:57,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:57,097 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 12:26:57,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1971463267, now seen corresponding path program 2 times [2023-09-01 12:26:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:57,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595846289] [2023-09-01 12:26:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:57,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595846289] [2023-09-01 12:26:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595846289] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:26:57,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255540757] [2023-09-01 12:26:57,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:26:57,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:57,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:26:57,391 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 12:26:57,393 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 12:26:57,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:26:57,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:26:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:26:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:26:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:57,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:26:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255540757] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:26:57,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:26:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 12:26:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718515856] [2023-09-01 12:26:57,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:26:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:26:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:26:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:26:58,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:26:58,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 93.84615384615384) internal successors, (1220), 13 states have internal predecessors, (1220), 0 states have call successors, (0), 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 12:26:58,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:58,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:26:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:26:58,806 INFO L130 PetriNetUnfolder]: 612/1001 cut-off events. [2023-09-01 12:26:58,806 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2023-09-01 12:26:58,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1001 events. 612/1001 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4333 event pairs, 30 based on Foata normal form. 7/1008 useless extension candidates. Maximal degree in co-relation 4336. Up to 537 conditions per place. [2023-09-01 12:26:58,812 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 99 selfloop transitions, 59 changer transitions 7/165 dead transitions. [2023-09-01 12:26:58,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 165 transitions, 1402 flow [2023-09-01 12:26:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:26:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:26:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1497 transitions. [2023-09-01 12:26:58,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455357142857143 [2023-09-01 12:26:58,815 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1497 transitions. [2023-09-01 12:26:58,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1497 transitions. [2023-09-01 12:26:58,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:26:58,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1497 transitions. [2023-09-01 12:26:58,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 99.8) internal successors, (1497), 15 states have internal predecessors, (1497), 0 states have call successors, (0), 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 12:26:58,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 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 12:26:58,822 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 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 12:26:58,822 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 307 flow. Second operand 15 states and 1497 transitions. [2023-09-01 12:26:58,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 165 transitions, 1402 flow [2023-09-01 12:26:58,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 165 transitions, 1259 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-09-01 12:26:58,828 INFO L231 Difference]: Finished difference. Result has 60 places, 86 transitions, 847 flow [2023-09-01 12:26:58,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=847, PETRI_PLACES=60, PETRI_TRANSITIONS=86} [2023-09-01 12:26:58,828 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2023-09-01 12:26:58,828 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 86 transitions, 847 flow [2023-09-01 12:26:58,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.84615384615384) internal successors, (1220), 13 states have internal predecessors, (1220), 0 states have call successors, (0), 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 12:26:58,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:26:58,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:26:58,836 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 12:26:59,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:59,036 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 12:26:59,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:26:59,037 INFO L85 PathProgramCache]: Analyzing trace with hash -237029505, now seen corresponding path program 3 times [2023-09-01 12:26:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:26:59,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895680996] [2023-09-01 12:26:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:26:59,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:26:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:26:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:59,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:26:59,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895680996] [2023-09-01 12:26:59,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895680996] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:26:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920780569] [2023-09-01 12:26:59,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:26:59,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:26:59,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:26:59,287 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 12:26:59,289 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 12:26:59,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:26:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:26:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:26:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:26:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:26:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:26:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920780569] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:26:59,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:26:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-09-01 12:26:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993245847] [2023-09-01 12:26:59,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:26:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:26:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:26:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:26:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:26:59,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:26:59,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 86 transitions, 847 flow. Second operand has 13 states, 13 states have (on average 93.84615384615384) internal successors, (1220), 13 states have internal predecessors, (1220), 0 states have call successors, (0), 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 12:26:59,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:26:59,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:26:59,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:00,522 INFO L130 PetriNetUnfolder]: 1100/1797 cut-off events. [2023-09-01 12:27:00,522 INFO L131 PetriNetUnfolder]: For 7302/7302 co-relation queries the response was YES. [2023-09-01 12:27:00,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 1797 events. 1100/1797 cut-off events. For 7302/7302 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8789 event pairs, 172 based on Foata normal form. 4/1801 useless extension candidates. Maximal degree in co-relation 7097. Up to 977 conditions per place. [2023-09-01 12:27:00,532 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 106 selfloop transitions, 80 changer transitions 5/191 dead transitions. [2023-09-01 12:27:00,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 2112 flow [2023-09-01 12:27:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:27:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:27:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 988 transitions. [2023-09-01 12:27:00,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44107142857142856 [2023-09-01 12:27:00,535 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 988 transitions. [2023-09-01 12:27:00,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 988 transitions. [2023-09-01 12:27:00,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:00,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 988 transitions. [2023-09-01 12:27:00,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.8) internal successors, (988), 10 states have internal predecessors, (988), 0 states have call successors, (0), 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 12:27:00,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 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 12:27:00,539 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 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 12:27:00,539 INFO L175 Difference]: Start difference. First operand has 60 places, 86 transitions, 847 flow. Second operand 10 states and 988 transitions. [2023-09-01 12:27:00,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 2112 flow [2023-09-01 12:27:00,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 1928 flow, removed 89 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:00,554 INFO L231 Difference]: Finished difference. Result has 71 places, 132 transitions, 1490 flow [2023-09-01 12:27:00,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1490, PETRI_PLACES=71, PETRI_TRANSITIONS=132} [2023-09-01 12:27:00,554 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-09-01 12:27:00,554 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 132 transitions, 1490 flow [2023-09-01 12:27:00,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.84615384615384) internal successors, (1220), 13 states have internal predecessors, (1220), 0 states have call successors, (0), 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 12:27:00,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:00,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:00,560 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 12:27:00,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:00,760 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 12:27:00,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1704426119, now seen corresponding path program 1 times [2023-09-01 12:27:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:00,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423624957] [2023-09-01 12:27:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:00,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:00,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423624957] [2023-09-01 12:27:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423624957] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:00,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374487041] [2023-09-01 12:27:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:00,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:00,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:00,837 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 12:27:00,866 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 12:27:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:27:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:00,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374487041] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:00,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:00,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 12:27:00,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626961115] [2023-09-01 12:27:00,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:00,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:27:01,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 132 transitions, 1490 flow. Second operand has 10 states, 10 states have (on average 98.8) internal successors, (988), 10 states have internal predecessors, (988), 0 states have call successors, (0), 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 12:27:01,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:01,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:27:01,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:01,519 INFO L130 PetriNetUnfolder]: 2041/3411 cut-off events. [2023-09-01 12:27:01,520 INFO L131 PetriNetUnfolder]: For 19991/19991 co-relation queries the response was YES. [2023-09-01 12:27:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18724 conditions, 3411 events. 2041/3411 cut-off events. For 19991/19991 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19781 event pairs, 67 based on Foata normal form. 64/3475 useless extension candidates. Maximal degree in co-relation 13927. Up to 1821 conditions per place. [2023-09-01 12:27:01,540 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 324 selfloop transitions, 103 changer transitions 5/432 dead transitions. [2023-09-01 12:27:01,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 432 transitions, 5461 flow [2023-09-01 12:27:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:27:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:27:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1241 transitions. [2023-09-01 12:27:01,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616815476190476 [2023-09-01 12:27:01,543 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1241 transitions. [2023-09-01 12:27:01,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1241 transitions. [2023-09-01 12:27:01,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:01,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1241 transitions. [2023-09-01 12:27:01,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.41666666666667) internal successors, (1241), 12 states have internal predecessors, (1241), 0 states have call successors, (0), 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 12:27:01,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 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 12:27:01,549 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 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 12:27:01,549 INFO L175 Difference]: Start difference. First operand has 71 places, 132 transitions, 1490 flow. Second operand 12 states and 1241 transitions. [2023-09-01 12:27:01,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 432 transitions, 5461 flow [2023-09-01 12:27:01,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 432 transitions, 5298 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-09-01 12:27:01,572 INFO L231 Difference]: Finished difference. Result has 87 places, 217 transitions, 3056 flow [2023-09-01 12:27:01,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3056, PETRI_PLACES=87, PETRI_TRANSITIONS=217} [2023-09-01 12:27:01,572 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 68 predicate places. [2023-09-01 12:27:01,572 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 217 transitions, 3056 flow [2023-09-01 12:27:01,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.8) internal successors, (988), 10 states have internal predecessors, (988), 0 states have call successors, (0), 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 12:27:01,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:01,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:01,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 12:27:01,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:01,784 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 12:27:01,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:01,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1605359529, now seen corresponding path program 2 times [2023-09-01 12:27:01,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:01,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368272705] [2023-09-01 12:27:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368272705] [2023-09-01 12:27:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368272705] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746821355] [2023-09-01 12:27:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:02,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:02,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:02,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:27:02,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:02,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:02,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:27:02,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:02,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:27:03,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746821355] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:03,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:03,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-09-01 12:27:03,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41973374] [2023-09-01 12:27:03,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:03,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:27:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:27:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:27:03,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:27:03,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 217 transitions, 3056 flow. Second operand has 17 states, 17 states have (on average 93.47058823529412) internal successors, (1589), 17 states have internal predecessors, (1589), 0 states have call successors, (0), 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 12:27:03,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:03,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:27:03,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:05,370 INFO L130 PetriNetUnfolder]: 2497/4190 cut-off events. [2023-09-01 12:27:05,371 INFO L131 PetriNetUnfolder]: For 38200/38200 co-relation queries the response was YES. [2023-09-01 12:27:05,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27532 conditions, 4190 events. 2497/4190 cut-off events. For 38200/38200 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25238 event pairs, 196 based on Foata normal form. 12/4202 useless extension candidates. Maximal degree in co-relation 24298. Up to 3160 conditions per place. [2023-09-01 12:27:05,406 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 330 selfloop transitions, 86 changer transitions 25/441 dead transitions. [2023-09-01 12:27:05,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 441 transitions, 6700 flow [2023-09-01 12:27:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:27:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:27:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1695 transitions. [2023-09-01 12:27:05,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44511554621848737 [2023-09-01 12:27:05,412 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1695 transitions. [2023-09-01 12:27:05,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1695 transitions. [2023-09-01 12:27:05,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:05,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1695 transitions. [2023-09-01 12:27:05,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.70588235294117) internal successors, (1695), 17 states have internal predecessors, (1695), 0 states have call successors, (0), 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 12:27:05,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 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 12:27:05,422 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 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 12:27:05,422 INFO L175 Difference]: Start difference. First operand has 87 places, 217 transitions, 3056 flow. Second operand 17 states and 1695 transitions. [2023-09-01 12:27:05,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 441 transitions, 6700 flow [2023-09-01 12:27:05,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 441 transitions, 6019 flow, removed 336 selfloop flow, removed 1 redundant places. [2023-09-01 12:27:05,485 INFO L231 Difference]: Finished difference. Result has 109 places, 277 transitions, 4044 flow [2023-09-01 12:27:05,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4044, PETRI_PLACES=109, PETRI_TRANSITIONS=277} [2023-09-01 12:27:05,486 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 90 predicate places. [2023-09-01 12:27:05,486 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 277 transitions, 4044 flow [2023-09-01 12:27:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 93.47058823529412) internal successors, (1589), 17 states have internal predecessors, (1589), 0 states have call successors, (0), 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 12:27:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:05,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:05,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:05,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:05,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -834738333, now seen corresponding path program 3 times [2023-09-01 12:27:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164440102] [2023-09-01 12:27:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:06,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164440102] [2023-09-01 12:27:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164440102] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081843002] [2023-09-01 12:27:06,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:06,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:06,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:06,037 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:06,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:27:06,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:27:06,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 12:27:06,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:06,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:27:06,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081843002] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:06,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:06,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2023-09-01 12:27:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013723510] [2023-09-01 12:27:06,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:27:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:27:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:27:08,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:27:08,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-09-01 12:27:08,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 277 transitions, 4044 flow. Second operand has 15 states, 15 states have (on average 95.53333333333333) internal successors, (1433), 15 states have internal predecessors, (1433), 0 states have call successors, (0), 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 12:27:08,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:08,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-09-01 12:27:08,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:10,583 INFO L130 PetriNetUnfolder]: 2896/4900 cut-off events. [2023-09-01 12:27:10,584 INFO L131 PetriNetUnfolder]: For 54216/54216 co-relation queries the response was YES. [2023-09-01 12:27:10,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 4900 events. 2896/4900 cut-off events. For 54216/54216 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30934 event pairs, 210 based on Foata normal form. 27/4927 useless extension candidates. Maximal degree in co-relation 32097. Up to 3748 conditions per place. [2023-09-01 12:27:10,614 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 344 selfloop transitions, 135 changer transitions 18/497 dead transitions. [2023-09-01 12:27:10,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 497 transitions, 7814 flow [2023-09-01 12:27:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:27:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:27:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2126 transitions. [2023-09-01 12:27:10,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45195578231292516 [2023-09-01 12:27:10,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2126 transitions. [2023-09-01 12:27:10,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2126 transitions. [2023-09-01 12:27:10,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:10,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2126 transitions. [2023-09-01 12:27:10,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.23809523809524) internal successors, (2126), 21 states have internal predecessors, (2126), 0 states have call successors, (0), 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 12:27:10,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 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 12:27:10,628 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 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 12:27:10,628 INFO L175 Difference]: Start difference. First operand has 109 places, 277 transitions, 4044 flow. Second operand 21 states and 2126 transitions. [2023-09-01 12:27:10,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 497 transitions, 7814 flow [2023-09-01 12:27:10,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 497 transitions, 7220 flow, removed 287 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:10,753 INFO L231 Difference]: Finished difference. Result has 132 places, 369 transitions, 5951 flow [2023-09-01 12:27:10,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5951, PETRI_PLACES=132, PETRI_TRANSITIONS=369} [2023-09-01 12:27:10,755 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2023-09-01 12:27:10,755 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 369 transitions, 5951 flow [2023-09-01 12:27:10,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 95.53333333333333) internal successors, (1433), 15 states have internal predecessors, (1433), 0 states have call successors, (0), 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 12:27:10,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:10,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:10,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:10,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash -922612837, now seen corresponding path program 4 times [2023-09-01 12:27:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506565220] [2023-09-01 12:27:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:11,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:11,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506565220] [2023-09-01 12:27:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506565220] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:11,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222096810] [2023-09-01 12:27:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:11,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:11,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:11,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:11,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:27:11,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:11,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:27:11,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:11,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222096810] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:11,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:11,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-09-01 12:27:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198832929] [2023-09-01 12:27:11,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:11,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:27:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:27:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:27:11,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:27:11,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 369 transitions, 5951 flow. Second operand has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 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 12:27:11,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:11,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:27:11,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:12,239 INFO L130 PetriNetUnfolder]: 3271/5800 cut-off events. [2023-09-01 12:27:12,240 INFO L131 PetriNetUnfolder]: For 71785/71785 co-relation queries the response was YES. [2023-09-01 12:27:12,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 5800 events. 3271/5800 cut-off events. For 71785/71785 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40295 event pairs, 296 based on Foata normal form. 40/5840 useless extension candidates. Maximal degree in co-relation 37952. Up to 2273 conditions per place. [2023-09-01 12:27:12,284 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 339 selfloop transitions, 316 changer transitions 6/661 dead transitions. [2023-09-01 12:27:12,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 661 transitions, 11513 flow [2023-09-01 12:27:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:27:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:27:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1437 transitions. [2023-09-01 12:27:12,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45822704081632654 [2023-09-01 12:27:12,287 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1437 transitions. [2023-09-01 12:27:12,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1437 transitions. [2023-09-01 12:27:12,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:12,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1437 transitions. [2023-09-01 12:27:12,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.64285714285714) internal successors, (1437), 14 states have internal predecessors, (1437), 0 states have call successors, (0), 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 12:27:12,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 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 12:27:12,294 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 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 12:27:12,294 INFO L175 Difference]: Start difference. First operand has 132 places, 369 transitions, 5951 flow. Second operand 14 states and 1437 transitions. [2023-09-01 12:27:12,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 661 transitions, 11513 flow [2023-09-01 12:27:12,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 661 transitions, 10434 flow, removed 527 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:12,541 INFO L231 Difference]: Finished difference. Result has 146 places, 467 transitions, 8053 flow [2023-09-01 12:27:12,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8053, PETRI_PLACES=146, PETRI_TRANSITIONS=467} [2023-09-01 12:27:12,541 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 127 predicate places. [2023-09-01 12:27:12,542 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 467 transitions, 8053 flow [2023-09-01 12:27:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 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 12:27:12,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:12,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:12,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 12:27:12,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 12:27:12,749 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:12,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1944370241, now seen corresponding path program 5 times [2023-09-01 12:27:12,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:12,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613969128] [2023-09-01 12:27:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:12,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613969128] [2023-09-01 12:27:12,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613969128] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751291733] [2023-09-01 12:27:12,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:27:12,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:12,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:12,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:27:13,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:27:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:27:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:13,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751291733] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:13,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-09-01 12:27:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373609279] [2023-09-01 12:27:13,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:13,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:27:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:27:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:27:14,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 224 [2023-09-01 12:27:14,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 467 transitions, 8053 flow. Second operand has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 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 12:27:14,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:14,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 224 [2023-09-01 12:27:14,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:18,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:27:23,602 INFO L130 PetriNetUnfolder]: 4345/7642 cut-off events. [2023-09-01 12:27:23,602 INFO L131 PetriNetUnfolder]: For 112133/112133 co-relation queries the response was YES. [2023-09-01 12:27:23,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57273 conditions, 7642 events. 4345/7642 cut-off events. For 112133/112133 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55220 event pairs, 238 based on Foata normal form. 19/7661 useless extension candidates. Maximal degree in co-relation 54841. Up to 3059 conditions per place. [2023-09-01 12:27:23,653 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 353 selfloop transitions, 565 changer transitions 21/939 dead transitions. [2023-09-01 12:27:23,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 939 transitions, 17802 flow [2023-09-01 12:27:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 12:27:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 12:27:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3434 transitions. [2023-09-01 12:27:23,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2023-09-01 12:27:23,658 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3434 transitions. [2023-09-01 12:27:23,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3434 transitions. [2023-09-01 12:27:23,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:23,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3434 transitions. [2023-09-01 12:27:23,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 101.0) internal successors, (3434), 34 states have internal predecessors, (3434), 0 states have call successors, (0), 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 12:27:23,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 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 12:27:23,669 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 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 12:27:23,669 INFO L175 Difference]: Start difference. First operand has 146 places, 467 transitions, 8053 flow. Second operand 34 states and 3434 transitions. [2023-09-01 12:27:23,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 939 transitions, 17802 flow [2023-09-01 12:27:24,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 939 transitions, 16869 flow, removed 454 selfloop flow, removed 3 redundant places. [2023-09-01 12:27:24,129 INFO L231 Difference]: Finished difference. Result has 188 places, 753 transitions, 15432 flow [2023-09-01 12:27:24,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=7632, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15432, PETRI_PLACES=188, PETRI_TRANSITIONS=753} [2023-09-01 12:27:24,130 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 169 predicate places. [2023-09-01 12:27:24,130 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 753 transitions, 15432 flow [2023-09-01 12:27:24,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 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 12:27:24,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:24,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:24,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 12:27:24,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:24,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:24,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash -620121257, now seen corresponding path program 6 times [2023-09-01 12:27:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:24,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196177923] [2023-09-01 12:27:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:24,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:24,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196177923] [2023-09-01 12:27:24,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196177923] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:24,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934148102] [2023-09-01 12:27:24,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:27:24,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:24,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:24,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:24,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:27:24,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:27:24,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:27:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:24,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934148102] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:24,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:24,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 12:27:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70577102] [2023-09-01 12:27:24,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:24,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:24,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:27:24,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 753 transitions, 15432 flow. Second operand has 10 states, 10 states have (on average 98.9) internal successors, (989), 10 states have internal predecessors, (989), 0 states have call successors, (0), 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 12:27:24,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:24,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:27:24,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:26,727 INFO L130 PetriNetUnfolder]: 5225/9187 cut-off events. [2023-09-01 12:27:26,727 INFO L131 PetriNetUnfolder]: For 149556/149556 co-relation queries the response was YES. [2023-09-01 12:27:26,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72583 conditions, 9187 events. 5225/9187 cut-off events. For 149556/149556 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 68369 event pairs, 424 based on Foata normal form. 174/9361 useless extension candidates. Maximal degree in co-relation 70289. Up to 3335 conditions per place. [2023-09-01 12:27:26,794 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 574 selfloop transitions, 625 changer transitions 0/1199 dead transitions. [2023-09-01 12:27:26,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1199 transitions, 25589 flow [2023-09-01 12:27:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:27:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:27:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1440 transitions. [2023-09-01 12:27:26,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2023-09-01 12:27:26,796 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1440 transitions. [2023-09-01 12:27:26,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1440 transitions. [2023-09-01 12:27:26,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:26,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1440 transitions. [2023-09-01 12:27:26,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.85714285714286) internal successors, (1440), 14 states have internal predecessors, (1440), 0 states have call successors, (0), 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 12:27:26,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 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 12:27:26,801 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 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 12:27:26,801 INFO L175 Difference]: Start difference. First operand has 188 places, 753 transitions, 15432 flow. Second operand 14 states and 1440 transitions. [2023-09-01 12:27:26,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1199 transitions, 25589 flow [2023-09-01 12:27:27,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1199 transitions, 22613 flow, removed 1469 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:27,797 INFO L231 Difference]: Finished difference. Result has 202 places, 948 transitions, 19816 flow [2023-09-01 12:27:27,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=13331, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19816, PETRI_PLACES=202, PETRI_TRANSITIONS=948} [2023-09-01 12:27:27,798 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 183 predicate places. [2023-09-01 12:27:27,798 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 948 transitions, 19816 flow [2023-09-01 12:27:27,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.9) internal successors, (989), 10 states have internal predecessors, (989), 0 states have call successors, (0), 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 12:27:27,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:27,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:27,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 12:27:28,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 12:27:28,004 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:28,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1394518185, now seen corresponding path program 7 times [2023-09-01 12:27:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186732243] [2023-09-01 12:27:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:28,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:28,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186732243] [2023-09-01 12:27:28,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186732243] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:28,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986544198] [2023-09-01 12:27:28,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:27:28,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:28,147 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:28,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:27:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:27:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:28,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986544198] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:28,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:28,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-09-01 12:27:28,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132794791] [2023-09-01 12:27:28,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:27:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:27:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:27:28,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:27:28,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 948 transitions, 19816 flow. Second operand has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 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 12:27:28,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:28,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:27:28,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:30,951 INFO L130 PetriNetUnfolder]: 5565/9746 cut-off events. [2023-09-01 12:27:30,951 INFO L131 PetriNetUnfolder]: For 182839/182839 co-relation queries the response was YES. [2023-09-01 12:27:31,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81471 conditions, 9746 events. 5565/9746 cut-off events. For 182839/182839 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 73520 event pairs, 108 based on Foata normal form. 100/9846 useless extension candidates. Maximal degree in co-relation 79428. Up to 3519 conditions per place. [2023-09-01 12:27:31,039 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 977 selfloop transitions, 485 changer transitions 0/1462 dead transitions. [2023-09-01 12:27:31,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1462 transitions, 29781 flow [2023-09-01 12:27:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:27:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:27:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1536 transitions. [2023-09-01 12:27:31,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-09-01 12:27:31,041 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1536 transitions. [2023-09-01 12:27:31,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1536 transitions. [2023-09-01 12:27:31,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:31,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1536 transitions. [2023-09-01 12:27:31,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.4) internal successors, (1536), 15 states have internal predecessors, (1536), 0 states have call successors, (0), 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 12:27:31,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 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 12:27:31,046 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 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 12:27:31,046 INFO L175 Difference]: Start difference. First operand has 202 places, 948 transitions, 19816 flow. Second operand 15 states and 1536 transitions. [2023-09-01 12:27:31,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1462 transitions, 29781 flow [2023-09-01 12:27:32,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1462 transitions, 29286 flow, removed 197 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:32,485 INFO L231 Difference]: Finished difference. Result has 216 places, 1043 transitions, 22932 flow [2023-09-01 12:27:32,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=19031, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22932, PETRI_PLACES=216, PETRI_TRANSITIONS=1043} [2023-09-01 12:27:32,486 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 197 predicate places. [2023-09-01 12:27:32,486 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1043 transitions, 22932 flow [2023-09-01 12:27:32,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 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 12:27:32,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:32,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:32,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 12:27:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 12:27:32,691 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:32,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -231131307, now seen corresponding path program 8 times [2023-09-01 12:27:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825041962] [2023-09-01 12:27:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:32,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:32,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825041962] [2023-09-01 12:27:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825041962] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:32,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706640623] [2023-09-01 12:27:32,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:32,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:32,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:27:32,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:32,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:27:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706640623] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:33,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-09-01 12:27:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508741829] [2023-09-01 12:27:33,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:33,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:27:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:27:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:27:33,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 224 [2023-09-01 12:27:33,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1043 transitions, 22932 flow. Second operand has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 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 12:27:33,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:33,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 224 [2023-09-01 12:27:33,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:40,501 INFO L130 PetriNetUnfolder]: 8047/14085 cut-off events. [2023-09-01 12:27:40,501 INFO L131 PetriNetUnfolder]: For 326478/326478 co-relation queries the response was YES. [2023-09-01 12:27:40,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128774 conditions, 14085 events. 8047/14085 cut-off events. For 326478/326478 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 111551 event pairs, 521 based on Foata normal form. 40/14125 useless extension candidates. Maximal degree in co-relation 125806. Up to 5312 conditions per place. [2023-09-01 12:27:40,627 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 700 selfloop transitions, 1174 changer transitions 37/1911 dead transitions. [2023-09-01 12:27:40,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1911 transitions, 47117 flow [2023-09-01 12:27:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 12:27:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 12:27:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4041 transitions. [2023-09-01 12:27:40,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4510044642857143 [2023-09-01 12:27:40,641 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4041 transitions. [2023-09-01 12:27:40,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4041 transitions. [2023-09-01 12:27:40,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:40,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4041 transitions. [2023-09-01 12:27:40,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 101.025) internal successors, (4041), 40 states have internal predecessors, (4041), 0 states have call successors, (0), 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 12:27:40,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 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 12:27:40,652 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 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 12:27:40,652 INFO L175 Difference]: Start difference. First operand has 216 places, 1043 transitions, 22932 flow. Second operand 40 states and 4041 transitions. [2023-09-01 12:27:40,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1911 transitions, 47117 flow [2023-09-01 12:27:43,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1911 transitions, 45876 flow, removed 616 selfloop flow, removed 1 redundant places. [2023-09-01 12:27:43,428 INFO L231 Difference]: Finished difference. Result has 267 places, 1629 transitions, 42950 flow [2023-09-01 12:27:43,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=22561, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=42950, PETRI_PLACES=267, PETRI_TRANSITIONS=1629} [2023-09-01 12:27:43,428 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 248 predicate places. [2023-09-01 12:27:43,428 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1629 transitions, 42950 flow [2023-09-01 12:27:43,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.38888888888889) internal successors, (1735), 18 states have internal predecessors, (1735), 0 states have call successors, (0), 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 12:27:43,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:43,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:43,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 12:27:43,634 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:43,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1040135160, now seen corresponding path program 9 times [2023-09-01 12:27:43,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:43,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899382184] [2023-09-01 12:27:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:27:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:43,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899382184] [2023-09-01 12:27:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899382184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:43,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237710867] [2023-09-01 12:27:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:43,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:43,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:43,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:43,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:27:43,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:27:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:27:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:27:43,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:27:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237710867] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:43,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 12:27:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45290889] [2023-09-01 12:27:43,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:43,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:43,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:27:43,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1629 transitions, 42950 flow. Second operand has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 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 12:27:43,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:43,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:27:43,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:50,069 INFO L130 PetriNetUnfolder]: 8442/14653 cut-off events. [2023-09-01 12:27:50,070 INFO L131 PetriNetUnfolder]: For 399821/399821 co-relation queries the response was YES. [2023-09-01 12:27:50,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143821 conditions, 14653 events. 8442/14653 cut-off events. For 399821/399821 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 115025 event pairs, 788 based on Foata normal form. 634/15287 useless extension candidates. Maximal degree in co-relation 141070. Up to 12266 conditions per place. [2023-09-01 12:27:50,218 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1635 selfloop transitions, 303 changer transitions 0/1938 dead transitions. [2023-09-01 12:27:50,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1938 transitions, 53143 flow [2023-09-01 12:27:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:27:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:27:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1350 transitions. [2023-09-01 12:27:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635989010989011 [2023-09-01 12:27:50,220 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1350 transitions. [2023-09-01 12:27:50,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1350 transitions. [2023-09-01 12:27:50,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:50,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1350 transitions. [2023-09-01 12:27:50,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 103.84615384615384) internal successors, (1350), 13 states have internal predecessors, (1350), 0 states have call successors, (0), 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 12:27:50,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 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 12:27:50,223 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 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 12:27:50,223 INFO L175 Difference]: Start difference. First operand has 267 places, 1629 transitions, 42950 flow. Second operand 13 states and 1350 transitions. [2023-09-01 12:27:50,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1938 transitions, 53143 flow [2023-09-01 12:27:54,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1938 transitions, 48203 flow, removed 2459 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:54,570 INFO L231 Difference]: Finished difference. Result has 281 places, 1785 transitions, 43291 flow [2023-09-01 12:27:54,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37157, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=43291, PETRI_PLACES=281, PETRI_TRANSITIONS=1785} [2023-09-01 12:27:54,571 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 262 predicate places. [2023-09-01 12:27:54,571 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1785 transitions, 43291 flow [2023-09-01 12:27:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 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 12:27:54,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:54,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:54,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:54,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:27:54,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:54,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1915724884, now seen corresponding path program 10 times [2023-09-01 12:27:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758679575] [2023-09-01 12:27:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:54,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:27:54,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:54,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758679575] [2023-09-01 12:27:54,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758679575] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:54,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799590708] [2023-09-01 12:27:54,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:54,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:54,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:54,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:54,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:27:54,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:54,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:54,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:27:54,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:27:54,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799590708] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:54,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:54,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 12:27:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248224723] [2023-09-01 12:27:54,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:27:54,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:27:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:27:54,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-09-01 12:27:54,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1785 transitions, 43291 flow. Second operand has 8 states, 8 states have (on average 102.875) internal successors, (823), 8 states have internal predecessors, (823), 0 states have call successors, (0), 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 12:27:54,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:54,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-09-01 12:27:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:59,115 INFO L130 PetriNetUnfolder]: 5394/9414 cut-off events. [2023-09-01 12:27:59,115 INFO L131 PetriNetUnfolder]: For 261369/261369 co-relation queries the response was YES. [2023-09-01 12:27:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87297 conditions, 9414 events. 5394/9414 cut-off events. For 261369/261369 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 69416 event pairs, 392 based on Foata normal form. 578/9992 useless extension candidates. Maximal degree in co-relation 86898. Up to 5483 conditions per place. [2023-09-01 12:27:59,214 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 1028 selfloop transitions, 306 changer transitions 0/1334 dead transitions. [2023-09-01 12:27:59,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1334 transitions, 34192 flow [2023-09-01 12:27:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2023-09-01 12:27:59,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830357142857143 [2023-09-01 12:27:59,215 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2023-09-01 12:27:59,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2023-09-01 12:27:59,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:59,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2023-09-01 12:27:59,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 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 12:27:59,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:27:59,217 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 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 12:27:59,217 INFO L175 Difference]: Start difference. First operand has 281 places, 1785 transitions, 43291 flow. Second operand 5 states and 541 transitions. [2023-09-01 12:27:59,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1334 transitions, 34192 flow [2023-09-01 12:28:01,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1334 transitions, 31457 flow, removed 729 selfloop flow, removed 15 redundant places. [2023-09-01 12:28:01,517 INFO L231 Difference]: Finished difference. Result has 271 places, 1195 transitions, 27062 flow [2023-09-01 12:28:01,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24503, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27062, PETRI_PLACES=271, PETRI_TRANSITIONS=1195} [2023-09-01 12:28:01,518 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 252 predicate places. [2023-09-01 12:28:01,518 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 1195 transitions, 27062 flow [2023-09-01 12:28:01,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.875) internal successors, (823), 8 states have internal predecessors, (823), 0 states have call successors, (0), 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 12:28:01,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:01,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:01,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:01,722 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:01,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 793995680, now seen corresponding path program 11 times [2023-09-01 12:28:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574323244] [2023-09-01 12:28:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:28:01,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574323244] [2023-09-01 12:28:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574323244] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654510811] [2023-09-01 12:28:01,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:28:01,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:01,791 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:01,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:28:01,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-09-01 12:28:01,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:01,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:28:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:28:01,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 12:28:01,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654510811] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:01,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:01,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-09-01 12:28:01,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124439556] [2023-09-01 12:28:01,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:01,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:28:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:28:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:28:01,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:28:01,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 1195 transitions, 27062 flow. Second operand has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 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 12:28:01,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:01,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:28:01,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:05,118 INFO L130 PetriNetUnfolder]: 5514/9733 cut-off events. [2023-09-01 12:28:05,118 INFO L131 PetriNetUnfolder]: For 240336/240336 co-relation queries the response was YES. [2023-09-01 12:28:05,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88938 conditions, 9733 events. 5514/9733 cut-off events. For 240336/240336 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 73126 event pairs, 256 based on Foata normal form. 14/9747 useless extension candidates. Maximal degree in co-relation 88596. Up to 6525 conditions per place. [2023-09-01 12:28:05,212 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1177 selfloop transitions, 154 changer transitions 21/1352 dead transitions. [2023-09-01 12:28:05,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1352 transitions, 32334 flow [2023-09-01 12:28:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:28:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:28:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1531 transitions. [2023-09-01 12:28:05,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556547619047619 [2023-09-01 12:28:05,214 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1531 transitions. [2023-09-01 12:28:05,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1531 transitions. [2023-09-01 12:28:05,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:05,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1531 transitions. [2023-09-01 12:28:05,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.06666666666666) internal successors, (1531), 15 states have internal predecessors, (1531), 0 states have call successors, (0), 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 12:28:05,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 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 12:28:05,218 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 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 12:28:05,218 INFO L175 Difference]: Start difference. First operand has 271 places, 1195 transitions, 27062 flow. Second operand 15 states and 1531 transitions. [2023-09-01 12:28:05,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1352 transitions, 32334 flow [2023-09-01 12:28:07,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1352 transitions, 32067 flow, removed 130 selfloop flow, removed 2 redundant places. [2023-09-01 12:28:07,329 INFO L231 Difference]: Finished difference. Result has 287 places, 1243 transitions, 28234 flow [2023-09-01 12:28:07,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26354, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28234, PETRI_PLACES=287, PETRI_TRANSITIONS=1243} [2023-09-01 12:28:07,330 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 268 predicate places. [2023-09-01 12:28:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1243 transitions, 28234 flow [2023-09-01 12:28:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.33333333333333) internal successors, (894), 9 states have internal predecessors, (894), 0 states have call successors, (0), 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 12:28:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:07,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:07,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:28:07,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:07,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -965795692, now seen corresponding path program 12 times [2023-09-01 12:28:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459439476] [2023-09-01 12:28:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459439476] [2023-09-01 12:28:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459439476] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103155212] [2023-09-01 12:28:07,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:28:07,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:07,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:07,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:28:07,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:28:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:28:07,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:07,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:07,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103155212] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:07,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:07,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-09-01 12:28:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465443479] [2023-09-01 12:28:07,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:07,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:28:07,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:28:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:28:07,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:28:07,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1243 transitions, 28234 flow. Second operand has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 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 12:28:07,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:07,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:28:07,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:11,718 INFO L130 PetriNetUnfolder]: 6399/11444 cut-off events. [2023-09-01 12:28:11,718 INFO L131 PetriNetUnfolder]: For 326691/326691 co-relation queries the response was YES. [2023-09-01 12:28:11,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106616 conditions, 11444 events. 6399/11444 cut-off events. For 326691/326691 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 89124 event pairs, 242 based on Foata normal form. 212/11656 useless extension candidates. Maximal degree in co-relation 105576. Up to 4631 conditions per place. [2023-09-01 12:28:11,824 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1099 selfloop transitions, 462 changer transitions 121/1682 dead transitions. [2023-09-01 12:28:11,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1682 transitions, 39344 flow [2023-09-01 12:28:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:28:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:28:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1228 transitions. [2023-09-01 12:28:11,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568452380952381 [2023-09-01 12:28:11,826 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1228 transitions. [2023-09-01 12:28:11,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1228 transitions. [2023-09-01 12:28:11,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:11,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1228 transitions. [2023-09-01 12:28:11,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 102.33333333333333) internal successors, (1228), 12 states have internal predecessors, (1228), 0 states have call successors, (0), 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 12:28:11,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 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 12:28:11,829 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 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 12:28:11,829 INFO L175 Difference]: Start difference. First operand has 287 places, 1243 transitions, 28234 flow. Second operand 12 states and 1228 transitions. [2023-09-01 12:28:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1682 transitions, 39344 flow [2023-09-01 12:28:14,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1682 transitions, 38745 flow, removed 293 selfloop flow, removed 2 redundant places. [2023-09-01 12:28:14,653 INFO L231 Difference]: Finished difference. Result has 302 places, 1297 transitions, 30938 flow [2023-09-01 12:28:14,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26055, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=30938, PETRI_PLACES=302, PETRI_TRANSITIONS=1297} [2023-09-01 12:28:14,654 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 283 predicate places. [2023-09-01 12:28:14,654 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1297 transitions, 30938 flow [2023-09-01 12:28:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 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 12:28:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:14,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:14,855 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:14,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:14,855 INFO L85 PathProgramCache]: Analyzing trace with hash 92124486, now seen corresponding path program 13 times [2023-09-01 12:28:14,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:14,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329276127] [2023-09-01 12:28:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:14,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:14,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329276127] [2023-09-01 12:28:14,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329276127] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331781444] [2023-09-01 12:28:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:14,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:14,920 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:14,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:28:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:28:14,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:15,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:15,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331781444] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:15,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:15,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-09-01 12:28:15,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43845470] [2023-09-01 12:28:15,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:28:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:28:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:28:15,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:28:15,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1297 transitions, 30938 flow. Second operand has 9 states, 9 states have (on average 99.44444444444444) internal successors, (895), 9 states have internal predecessors, (895), 0 states have call successors, (0), 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 12:28:15,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:15,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:28:15,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:19,128 INFO L130 PetriNetUnfolder]: 6081/10853 cut-off events. [2023-09-01 12:28:19,128 INFO L131 PetriNetUnfolder]: For 370313/370313 co-relation queries the response was YES. [2023-09-01 12:28:19,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106692 conditions, 10853 events. 6081/10853 cut-off events. For 370313/370313 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83047 event pairs, 466 based on Foata normal form. 366/11219 useless extension candidates. Maximal degree in co-relation 105441. Up to 6459 conditions per place. [2023-09-01 12:28:19,252 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 999 selfloop transitions, 540 changer transitions 2/1541 dead transitions. [2023-09-01 12:28:19,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1541 transitions, 38699 flow [2023-09-01 12:28:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1133 transitions. [2023-09-01 12:28:19,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-09-01 12:28:19,254 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1133 transitions. [2023-09-01 12:28:19,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1133 transitions. [2023-09-01 12:28:19,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:19,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1133 transitions. [2023-09-01 12:28:19,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.0) internal successors, (1133), 11 states have internal predecessors, (1133), 0 states have call successors, (0), 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 12:28:19,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 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 12:28:19,256 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 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 12:28:19,257 INFO L175 Difference]: Start difference. First operand has 302 places, 1297 transitions, 30938 flow. Second operand 11 states and 1133 transitions. [2023-09-01 12:28:19,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1541 transitions, 38699 flow [2023-09-01 12:28:23,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1541 transitions, 36645 flow, removed 992 selfloop flow, removed 7 redundant places. [2023-09-01 12:28:23,148 INFO L231 Difference]: Finished difference. Result has 307 places, 1357 transitions, 32575 flow [2023-09-01 12:28:23,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28898, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32575, PETRI_PLACES=307, PETRI_TRANSITIONS=1357} [2023-09-01 12:28:23,149 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 288 predicate places. [2023-09-01 12:28:23,150 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 1357 transitions, 32575 flow [2023-09-01 12:28:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.44444444444444) internal successors, (895), 9 states have internal predecessors, (895), 0 states have call successors, (0), 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 12:28:23,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:23,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:23,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:23,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:23,350 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:23,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -675962772, now seen corresponding path program 14 times [2023-09-01 12:28:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139608752] [2023-09-01 12:28:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:23,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:23,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139608752] [2023-09-01 12:28:23,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139608752] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:28:23,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:28:23,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:28:23,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675608264] [2023-09-01 12:28:23,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:28:23,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:28:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:23,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:28:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:28:23,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-09-01 12:28:23,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1357 transitions, 32575 flow. Second operand has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 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 12:28:23,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:23,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-09-01 12:28:23,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:26,813 INFO L130 PetriNetUnfolder]: 4822/8940 cut-off events. [2023-09-01 12:28:26,813 INFO L131 PetriNetUnfolder]: For 280364/280364 co-relation queries the response was YES. [2023-09-01 12:28:26,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87238 conditions, 8940 events. 4822/8940 cut-off events. For 280364/280364 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 68547 event pairs, 1144 based on Foata normal form. 402/9342 useless extension candidates. Maximal degree in co-relation 85433. Up to 4972 conditions per place. [2023-09-01 12:28:26,905 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 878 selfloop transitions, 235 changer transitions 220/1333 dead transitions. [2023-09-01 12:28:26,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1333 transitions, 35595 flow [2023-09-01 12:28:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:28:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:28:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2023-09-01 12:28:26,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48325892857142855 [2023-09-01 12:28:26,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2023-09-01 12:28:26,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2023-09-01 12:28:26,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:26,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2023-09-01 12:28:26,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 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 12:28:26,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 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 12:28:26,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 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 12:28:26,907 INFO L175 Difference]: Start difference. First operand has 307 places, 1357 transitions, 32575 flow. Second operand 4 states and 433 transitions. [2023-09-01 12:28:26,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1333 transitions, 35595 flow [2023-09-01 12:28:29,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1333 transitions, 34669 flow, removed 405 selfloop flow, removed 5 redundant places. [2023-09-01 12:28:29,304 INFO L231 Difference]: Finished difference. Result has 304 places, 1027 transitions, 24701 flow [2023-09-01 12:28:29,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=27862, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=24701, PETRI_PLACES=304, PETRI_TRANSITIONS=1027} [2023-09-01 12:28:29,305 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 285 predicate places. [2023-09-01 12:28:29,305 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1027 transitions, 24701 flow [2023-09-01 12:28:29,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 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 12:28:29,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:29,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:29,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 12:28:29,306 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:29,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -16554560, now seen corresponding path program 4 times [2023-09-01 12:28:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:29,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235327828] [2023-09-01 12:28:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:29,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:29,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:29,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235327828] [2023-09-01 12:28:29,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235327828] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:29,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794957035] [2023-09-01 12:28:29,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:28:29,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:29,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:29,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:29,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 12:28:29,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:28:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:28:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:29,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:29,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794957035] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:29,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:29,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-09-01 12:28:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315796744] [2023-09-01 12:28:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:28:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:28:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:28:29,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:28:29,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1027 transitions, 24701 flow. Second operand has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 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 12:28:29,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:29,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:28:29,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:33,182 INFO L130 PetriNetUnfolder]: 5467/10063 cut-off events. [2023-09-01 12:28:33,182 INFO L131 PetriNetUnfolder]: For 344825/344825 co-relation queries the response was YES. [2023-09-01 12:28:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101410 conditions, 10063 events. 5467/10063 cut-off events. For 344825/344825 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 76325 event pairs, 514 based on Foata normal form. 132/10195 useless extension candidates. Maximal degree in co-relation 99551. Up to 3245 conditions per place. [2023-09-01 12:28:33,285 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 753 selfloop transitions, 839 changer transitions 1/1593 dead transitions. [2023-09-01 12:28:33,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1593 transitions, 40963 flow [2023-09-01 12:28:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:28:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:28:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2368 transitions. [2023-09-01 12:28:33,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45962732919254656 [2023-09-01 12:28:33,288 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2368 transitions. [2023-09-01 12:28:33,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2368 transitions. [2023-09-01 12:28:33,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:33,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2368 transitions. [2023-09-01 12:28:33,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.95652173913044) internal successors, (2368), 23 states have internal predecessors, (2368), 0 states have call successors, (0), 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 12:28:33,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 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 12:28:33,293 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 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 12:28:33,293 INFO L175 Difference]: Start difference. First operand has 304 places, 1027 transitions, 24701 flow. Second operand 23 states and 2368 transitions. [2023-09-01 12:28:33,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1593 transitions, 40963 flow [2023-09-01 12:28:35,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1593 transitions, 40088 flow, removed 238 selfloop flow, removed 7 redundant places. [2023-09-01 12:28:35,731 INFO L231 Difference]: Finished difference. Result has 329 places, 1331 transitions, 35950 flow [2023-09-01 12:28:35,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24098, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35950, PETRI_PLACES=329, PETRI_TRANSITIONS=1331} [2023-09-01 12:28:35,732 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 310 predicate places. [2023-09-01 12:28:35,732 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1331 transitions, 35950 flow [2023-09-01 12:28:35,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 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 12:28:35,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:35,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:35,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:35,937 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:35,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -862660922, now seen corresponding path program 5 times [2023-09-01 12:28:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:35,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348966265] [2023-09-01 12:28:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:36,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348966265] [2023-09-01 12:28:36,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348966265] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:36,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144959324] [2023-09-01 12:28:36,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:28:36,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:36,029 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:36,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 12:28:36,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:28:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:28:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:36,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:36,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144959324] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:36,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-09-01 12:28:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142383552] [2023-09-01 12:28:36,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:28:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:28:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:28:36,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 12:28:36,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1331 transitions, 35950 flow. Second operand has 12 states, 12 states have (on average 98.83333333333333) internal successors, (1186), 12 states have internal predecessors, (1186), 0 states have call successors, (0), 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 12:28:36,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:36,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 12:28:36,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:40,572 INFO L130 PetriNetUnfolder]: 5260/9755 cut-off events. [2023-09-01 12:28:40,572 INFO L131 PetriNetUnfolder]: For 384579/384579 co-relation queries the response was YES. [2023-09-01 12:28:40,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103335 conditions, 9755 events. 5260/9755 cut-off events. For 384579/384579 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 74697 event pairs, 82 based on Foata normal form. 112/9867 useless extension candidates. Maximal degree in co-relation 101432. Up to 2999 conditions per place. [2023-09-01 12:28:40,684 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1024 selfloop transitions, 663 changer transitions 25/1712 dead transitions. [2023-09-01 12:28:40,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1712 transitions, 45857 flow [2023-09-01 12:28:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 12:28:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 12:28:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2453 transitions. [2023-09-01 12:28:40,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562872023809524 [2023-09-01 12:28:40,687 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2453 transitions. [2023-09-01 12:28:40,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2453 transitions. [2023-09-01 12:28:40,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:40,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2453 transitions. [2023-09-01 12:28:40,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.20833333333333) internal successors, (2453), 24 states have internal predecessors, (2453), 0 states have call successors, (0), 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 12:28:40,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 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 12:28:40,692 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 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 12:28:40,692 INFO L175 Difference]: Start difference. First operand has 329 places, 1331 transitions, 35950 flow. Second operand 24 states and 2453 transitions. [2023-09-01 12:28:40,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1712 transitions, 45857 flow [2023-09-01 12:28:43,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1712 transitions, 44847 flow, removed 414 selfloop flow, removed 5 redundant places. [2023-09-01 12:28:43,654 INFO L231 Difference]: Finished difference. Result has 352 places, 1341 transitions, 37421 flow [2023-09-01 12:28:43,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34224, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=37421, PETRI_PLACES=352, PETRI_TRANSITIONS=1341} [2023-09-01 12:28:43,655 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 333 predicate places. [2023-09-01 12:28:43,655 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1341 transitions, 37421 flow [2023-09-01 12:28:43,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.83333333333333) internal successors, (1186), 12 states have internal predecessors, (1186), 0 states have call successors, (0), 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 12:28:43,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:43,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:43,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 12:28:43,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:43,856 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:43,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 793791252, now seen corresponding path program 15 times [2023-09-01 12:28:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:43,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881973067] [2023-09-01 12:28:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:43,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881973067] [2023-09-01 12:28:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881973067] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537099841] [2023-09-01 12:28:43,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:28:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:43,908 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 12:28:43,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:28:43,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:44,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:44,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537099841] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:44,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:44,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 12:28:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203475046] [2023-09-01 12:28:44,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:28:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:44,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:28:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:28:44,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-09-01 12:28:44,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1341 transitions, 37421 flow. Second operand has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 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 12:28:44,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:44,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-09-01 12:28:44,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:49,782 INFO L130 PetriNetUnfolder]: 7296/13519 cut-off events. [2023-09-01 12:28:49,782 INFO L131 PetriNetUnfolder]: For 595615/595615 co-relation queries the response was YES. [2023-09-01 12:28:49,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147344 conditions, 13519 events. 7296/13519 cut-off events. For 595615/595615 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 109735 event pairs, 317 based on Foata normal form. 410/13929 useless extension candidates. Maximal degree in co-relation 145852. Up to 5039 conditions per place. [2023-09-01 12:28:49,933 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 1638 selfloop transitions, 431 changer transitions 24/2093 dead transitions. [2023-09-01 12:28:49,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2093 transitions, 63873 flow [2023-09-01 12:28:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:28:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:28:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 760 transitions. [2023-09-01 12:28:49,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2023-09-01 12:28:49,936 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 760 transitions. [2023-09-01 12:28:49,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 760 transitions. [2023-09-01 12:28:49,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:49,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 760 transitions. [2023-09-01 12:28:49,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 0 states have call successors, (0), 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 12:28:49,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 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 12:28:49,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 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 12:28:49,938 INFO L175 Difference]: Start difference. First operand has 352 places, 1341 transitions, 37421 flow. Second operand 7 states and 760 transitions. [2023-09-01 12:28:49,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2093 transitions, 63873 flow [2023-09-01 12:28:55,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2093 transitions, 60533 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-09-01 12:28:55,421 INFO L231 Difference]: Finished difference. Result has 348 places, 1388 transitions, 38612 flow [2023-09-01 12:28:55,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=33052, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38612, PETRI_PLACES=348, PETRI_TRANSITIONS=1388} [2023-09-01 12:28:55,422 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 329 predicate places. [2023-09-01 12:28:55,422 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1388 transitions, 38612 flow [2023-09-01 12:28:55,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.54545454545455) internal successors, (1128), 11 states have internal predecessors, (1128), 0 states have call successors, (0), 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 12:28:55,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:55,422 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:55,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:55,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 12:28:55,627 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:55,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1483838864, now seen corresponding path program 16 times [2023-09-01 12:28:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380516647] [2023-09-01 12:28:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:55,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:55,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380516647] [2023-09-01 12:28:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380516647] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:55,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119735718] [2023-09-01 12:28:55,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:28:55,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:55,901 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:55,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 12:28:56,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:28:56,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:28:56,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:56,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:56,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119735718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:56,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:56,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 12:28:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034904521] [2023-09-01 12:28:56,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:56,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:28:56,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:56,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:28:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:28:57,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:28:57,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1388 transitions, 38612 flow. Second operand has 21 states, 21 states have (on average 93.52380952380952) internal successors, (1964), 21 states have internal predecessors, (1964), 0 states have call successors, (0), 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 12:28:57,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:57,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:28:57,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:01,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:29:09,170 INFO L130 PetriNetUnfolder]: 7975/14846 cut-off events. [2023-09-01 12:29:09,170 INFO L131 PetriNetUnfolder]: For 580654/580654 co-relation queries the response was YES. [2023-09-01 12:29:09,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159108 conditions, 14846 events. 7975/14846 cut-off events. For 580654/580654 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 122866 event pairs, 742 based on Foata normal form. 20/14866 useless extension candidates. Maximal degree in co-relation 156918. Up to 13663 conditions per place. [2023-09-01 12:29:09,338 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1502 selfloop transitions, 165 changer transitions 19/1686 dead transitions. [2023-09-01 12:29:09,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1686 transitions, 49709 flow [2023-09-01 12:29:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:29:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:29:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1769 transitions. [2023-09-01 12:29:09,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43874007936507936 [2023-09-01 12:29:09,341 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1769 transitions. [2023-09-01 12:29:09,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1769 transitions. [2023-09-01 12:29:09,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:09,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1769 transitions. [2023-09-01 12:29:09,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 98.27777777777777) internal successors, (1769), 18 states have internal predecessors, (1769), 0 states have call successors, (0), 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 12:29:09,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 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 12:29:09,345 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 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 12:29:09,345 INFO L175 Difference]: Start difference. First operand has 348 places, 1388 transitions, 38612 flow. Second operand 18 states and 1769 transitions. [2023-09-01 12:29:09,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1686 transitions, 49709 flow [2023-09-01 12:29:14,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1686 transitions, 48944 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-09-01 12:29:14,439 INFO L231 Difference]: Finished difference. Result has 370 places, 1526 transitions, 42758 flow [2023-09-01 12:29:14,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37965, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42758, PETRI_PLACES=370, PETRI_TRANSITIONS=1526} [2023-09-01 12:29:14,440 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 351 predicate places. [2023-09-01 12:29:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1526 transitions, 42758 flow [2023-09-01 12:29:14,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.52380952380952) internal successors, (1964), 21 states have internal predecessors, (1964), 0 states have call successors, (0), 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 12:29:14,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:14,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:14,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 12:29:14,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:14,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 351091990, now seen corresponding path program 17 times [2023-09-01 12:29:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:14,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087809033] [2023-09-01 12:29:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:14,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087809033] [2023-09-01 12:29:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087809033] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046053678] [2023-09-01 12:29:14,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:29:14,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:14,869 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:14,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 12:29:15,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:29:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 12:29:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:15,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046053678] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:15,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:15,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 12:29:15,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276645815] [2023-09-01 12:29:15,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:29:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:29:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:29:16,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:29:16,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1526 transitions, 42758 flow. Second operand has 21 states, 21 states have (on average 93.47619047619048) internal successors, (1963), 21 states have internal predecessors, (1963), 0 states have call successors, (0), 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 12:29:16,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:16,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:29:16,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:25,741 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 42 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:29:28,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:29:36,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:29:39,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:29:41,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:29:43,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:29:46,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 12:29:48,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 12:29:54,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:00,229 INFO L130 PetriNetUnfolder]: 8824/16477 cut-off events. [2023-09-01 12:30:00,230 INFO L131 PetriNetUnfolder]: For 664178/664178 co-relation queries the response was YES. [2023-09-01 12:30:00,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179083 conditions, 16477 events. 8824/16477 cut-off events. For 664178/664178 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 138658 event pairs, 848 based on Foata normal form. 26/16503 useless extension candidates. Maximal degree in co-relation 174121. Up to 15009 conditions per place. [2023-09-01 12:30:00,417 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1669 selfloop transitions, 201 changer transitions 32/1902 dead transitions. [2023-09-01 12:30:00,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1902 transitions, 56780 flow [2023-09-01 12:30:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:30:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:30:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2155 transitions. [2023-09-01 12:30:00,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43729707792207795 [2023-09-01 12:30:00,419 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2155 transitions. [2023-09-01 12:30:00,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2155 transitions. [2023-09-01 12:30:00,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:00,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2155 transitions. [2023-09-01 12:30:00,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.95454545454545) internal successors, (2155), 22 states have internal predecessors, (2155), 0 states have call successors, (0), 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 12:30:00,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 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 12:30:00,423 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 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 12:30:00,423 INFO L175 Difference]: Start difference. First operand has 370 places, 1526 transitions, 42758 flow. Second operand 22 states and 2155 transitions. [2023-09-01 12:30:00,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1902 transitions, 56780 flow [2023-09-01 12:30:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1902 transitions, 56010 flow, removed 377 selfloop flow, removed 5 redundant places. [2023-09-01 12:30:06,690 INFO L231 Difference]: Finished difference. Result has 395 places, 1700 transitions, 48151 flow [2023-09-01 12:30:06,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=41988, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48151, PETRI_PLACES=395, PETRI_TRANSITIONS=1700} [2023-09-01 12:30:06,691 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 376 predicate places. [2023-09-01 12:30:06,691 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1700 transitions, 48151 flow [2023-09-01 12:30:06,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.47619047619048) internal successors, (1963), 21 states have internal predecessors, (1963), 0 states have call successors, (0), 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 12:30:06,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:06,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:06,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-09-01 12:30:06,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 12:30:06,892 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:30:06,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1811320966, now seen corresponding path program 18 times [2023-09-01 12:30:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550565867] [2023-09-01 12:30:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:07,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:07,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550565867] [2023-09-01 12:30:07,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550565867] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:07,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615677401] [2023-09-01 12:30:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:30:07,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:07,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:07,177 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:07,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 12:30:07,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-09-01 12:30:07,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:30:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:30:41,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615677401] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:41,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:41,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 12:30:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318663624] [2023-09-01 12:30:41,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:41,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:30:41,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:30:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=340, Unknown=14, NotChecked=0, Total=420 [2023-09-01 12:30:43,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:45,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:47,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:49,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:51,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:53,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:55,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:57,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:30:57,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-09-01 12:30:57,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1700 transitions, 48151 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 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 12:30:57,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:57,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-09-01 12:30:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:31:00,072 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 12:31:02,842 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 12:31:05,946 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-09-01 12:31:13,043 INFO L130 PetriNetUnfolder]: 9273/17371 cut-off events. [2023-09-01 12:31:13,044 INFO L131 PetriNetUnfolder]: For 743960/743960 co-relation queries the response was YES. [2023-09-01 12:31:13,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192852 conditions, 17371 events. 9273/17371 cut-off events. For 743960/743960 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 148103 event pairs, 895 based on Foata normal form. 11/17382 useless extension candidates. Maximal degree in co-relation 189597. Up to 16419 conditions per place. [2023-09-01 12:31:13,252 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 1790 selfloop transitions, 145 changer transitions 11/1946 dead transitions. [2023-09-01 12:31:13,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1946 transitions, 58802 flow [2023-09-01 12:31:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:31:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:31:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1615 transitions. [2023-09-01 12:31:13,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054563492063494 [2023-09-01 12:31:13,254 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1615 transitions. [2023-09-01 12:31:13,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1615 transitions. [2023-09-01 12:31:13,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:31:13,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1615 transitions. [2023-09-01 12:31:13,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 89.72222222222223) internal successors, (1615), 18 states have internal predecessors, (1615), 0 states have call successors, (0), 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 12:31:13,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 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 12:31:13,258 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 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 12:31:13,258 INFO L175 Difference]: Start difference. First operand has 395 places, 1700 transitions, 48151 flow. Second operand 18 states and 1615 transitions. [2023-09-01 12:31:13,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1946 transitions, 58802 flow [2023-09-01 12:31:20,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1946 transitions, 57258 flow, removed 761 selfloop flow, removed 5 redundant places. [2023-09-01 12:31:20,954 INFO L231 Difference]: Finished difference. Result has 417 places, 1813 transitions, 50672 flow [2023-09-01 12:31:20,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=46695, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=50672, PETRI_PLACES=417, PETRI_TRANSITIONS=1813} [2023-09-01 12:31:20,955 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 398 predicate places. [2023-09-01 12:31:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1813 transitions, 50672 flow [2023-09-01 12:31:20,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 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 12:31:20,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:31:20,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:31:20,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 12:31:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:21,156 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:31:21,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:31:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1559351968, now seen corresponding path program 19 times [2023-09-01 12:31:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:31:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268830912] [2023-09-01 12:31:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:31:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:31:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:31:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268830912] [2023-09-01 12:31:21,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268830912] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:31:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304712963] [2023-09-01 12:31:21,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:31:21,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:31:21,405 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:31:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 12:31:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:21,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:31:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:31:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:22,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:31:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:22,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304712963] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:31:22,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:31:22,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 12:31:22,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145126232] [2023-09-01 12:31:22,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:31:22,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:31:22,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:31:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:31:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:31:24,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:31:24,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1813 transitions, 50672 flow. Second operand has 22 states, 22 states have (on average 93.31818181818181) internal successors, (2053), 22 states have internal predecessors, (2053), 0 states have call successors, (0), 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 12:31:24,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:31:24,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:31:24,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:31:46,021 INFO L130 PetriNetUnfolder]: 10806/20314 cut-off events. [2023-09-01 12:31:46,021 INFO L131 PetriNetUnfolder]: For 942729/942729 co-relation queries the response was YES. [2023-09-01 12:31:46,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240890 conditions, 20314 events. 10806/20314 cut-off events. For 942729/942729 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 178025 event pairs, 836 based on Foata normal form. 12/20326 useless extension candidates. Maximal degree in co-relation 236222. Up to 12382 conditions per place. [2023-09-01 12:31:46,299 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1068 selfloop transitions, 1364 changer transitions 22/2454 dead transitions. [2023-09-01 12:31:46,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2454 transitions, 73835 flow [2023-09-01 12:31:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 12:31:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 12:31:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3296 transitions. [2023-09-01 12:31:46,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327731092436975 [2023-09-01 12:31:46,302 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3296 transitions. [2023-09-01 12:31:46,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3296 transitions. [2023-09-01 12:31:46,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:31:46,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3296 transitions. [2023-09-01 12:31:46,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 96.94117647058823) internal successors, (3296), 34 states have internal predecessors, (3296), 0 states have call successors, (0), 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 12:31:46,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 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 12:31:46,404 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 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 12:31:46,404 INFO L175 Difference]: Start difference. First operand has 417 places, 1813 transitions, 50672 flow. Second operand 34 states and 3296 transitions. [2023-09-01 12:31:46,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2454 transitions, 73835 flow [2023-09-01 12:31:57,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2454 transitions, 73025 flow, removed 394 selfloop flow, removed 6 redundant places. [2023-09-01 12:31:57,061 INFO L231 Difference]: Finished difference. Result has 457 places, 2229 transitions, 69517 flow [2023-09-01 12:31:57,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=49966, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=69517, PETRI_PLACES=457, PETRI_TRANSITIONS=2229} [2023-09-01 12:31:57,062 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 438 predicate places. [2023-09-01 12:31:57,062 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2229 transitions, 69517 flow [2023-09-01 12:31:57,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.31818181818181) internal successors, (2053), 22 states have internal predecessors, (2053), 0 states have call successors, (0), 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 12:31:57,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:31:57,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:31:57,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 12:31:57,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 12:31:57,269 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:31:57,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:31:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1704281468, now seen corresponding path program 20 times [2023-09-01 12:31:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:31:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025255002] [2023-09-01 12:31:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:31:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:31:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:31:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025255002] [2023-09-01 12:31:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025255002] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:31:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455057896] [2023-09-01 12:31:57,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:31:57,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:31:57,501 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:31:57,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 12:31:57,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:31:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:31:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 12:31:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:31:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:58,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:31:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455057896] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:31:58,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:31:58,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 12:31:58,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722020957] [2023-09-01 12:31:58,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:31:58,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:31:58,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:31:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:31:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:32:00,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:32:00,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2229 transitions, 69517 flow. Second operand has 21 states, 21 states have (on average 93.57142857142857) internal successors, (1965), 21 states have internal predecessors, (1965), 0 states have call successors, (0), 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 12:32:00,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:32:00,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:32:00,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:32:13,858 WARN L222 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 60 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:32:19,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:21,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:23,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:32:25,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:28,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:31,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:33,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:35,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:38,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:40,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:42,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:32:45,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:33:06,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:33:11,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:33:13,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:33:15,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:33:17,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:33:20,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:33:24,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:33:38,112 INFO L130 PetriNetUnfolder]: 12248/23143 cut-off events. [2023-09-01 12:33:38,112 INFO L131 PetriNetUnfolder]: For 1239590/1239590 co-relation queries the response was YES. [2023-09-01 12:33:38,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291293 conditions, 23143 events. 12248/23143 cut-off events. For 1239590/1239590 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 204353 event pairs, 1192 based on Foata normal form. 28/23171 useless extension candidates. Maximal degree in co-relation 284729. Up to 20127 conditions per place. [2023-09-01 12:33:38,459 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2312 selfloop transitions, 425 changer transitions 33/2770 dead transitions. [2023-09-01 12:33:38,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2770 transitions, 91999 flow [2023-09-01 12:33:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:33:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:33:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3019 transitions. [2023-09-01 12:33:38,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43476382488479265 [2023-09-01 12:33:38,461 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3019 transitions. [2023-09-01 12:33:38,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3019 transitions. [2023-09-01 12:33:38,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:33:38,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3019 transitions. [2023-09-01 12:33:38,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 97.38709677419355) internal successors, (3019), 31 states have internal predecessors, (3019), 0 states have call successors, (0), 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 12:33:38,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 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 12:33:38,467 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 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 12:33:38,467 INFO L175 Difference]: Start difference. First operand has 457 places, 2229 transitions, 69517 flow. Second operand 31 states and 3019 transitions. [2023-09-01 12:33:38,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2770 transitions, 91999 flow [2023-09-01 12:33:54,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2770 transitions, 88999 flow, removed 1468 selfloop flow, removed 15 redundant places. [2023-09-01 12:33:54,138 INFO L231 Difference]: Finished difference. Result has 486 places, 2516 transitions, 78618 flow [2023-09-01 12:33:54,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=66753, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=78618, PETRI_PLACES=486, PETRI_TRANSITIONS=2516} [2023-09-01 12:33:54,140 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 467 predicate places. [2023-09-01 12:33:54,140 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2516 transitions, 78618 flow [2023-09-01 12:33:54,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.57142857142857) internal successors, (1965), 21 states have internal predecessors, (1965), 0 states have call successors, (0), 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 12:33:54,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:33:54,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:33:54,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 12:33:54,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:33:54,345 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:33:54,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:33:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1960753912, now seen corresponding path program 21 times [2023-09-01 12:33:54,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:33:54,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651159790] [2023-09-01 12:33:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:33:54,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:33:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:33:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:33:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651159790] [2023-09-01 12:33:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651159790] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:33:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436496936] [2023-09-01 12:33:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:33:54,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:33:54,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:33:54,601 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:33:54,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 12:33:54,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:33:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:33:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:33:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:33:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:55,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:33:57,498 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-09-01 12:33:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-09-01 12:33:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436496936] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:33:57,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:33:57,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-09-01 12:33:57,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285698538] [2023-09-01 12:33:57,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:33:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:33:57,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:33:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:33:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=321, Unknown=1, NotChecked=36, Total=420 [2023-09-01 12:33:57,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-09-01 12:33:57,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2516 transitions, 78618 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 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 12:33:57,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:33:57,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-09-01 12:33:57,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:35:22,753 WARN L222 SmtUtils]: Spent 46.40s on a formula simplification. DAG size of input: 56 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:35:24,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:26,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:28,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:31,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:33,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:35,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:37,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:39,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:41,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:43,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:45,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:47,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:35:49,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:51,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:35:53,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:55,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:57,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:35:59,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:01,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:03,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:05,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:07,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:09,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:11,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:13,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:15,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:17,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:19,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:21,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:36:23,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:25,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:27,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:29,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:31,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:33,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:35,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:37,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:39,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:41,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:43,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:45,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:47,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:36:50,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 12:36:52,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:37:04,706 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-09-01 12:37:14,633 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-09-01 12:37:26,414 INFO L130 PetriNetUnfolder]: 12674/23933 cut-off events. [2023-09-01 12:37:26,415 INFO L131 PetriNetUnfolder]: For 1295123/1295123 co-relation queries the response was YES. [2023-09-01 12:37:26,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301350 conditions, 23933 events. 12674/23933 cut-off events. For 1295123/1295123 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 212452 event pairs, 1075 based on Foata normal form. 9/23942 useless extension candidates. Maximal degree in co-relation 297354. Up to 16182 conditions per place. [2023-09-01 12:37:26,919 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 1350 selfloop transitions, 1401 changer transitions 20/2771 dead transitions. [2023-09-01 12:37:26,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 2771 transitions, 91163 flow [2023-09-01 12:37:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:37:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:37:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2300 transitions. [2023-09-01 12:37:26,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949175824175824 [2023-09-01 12:37:26,922 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2300 transitions. [2023-09-01 12:37:26,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2300 transitions. [2023-09-01 12:37:26,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:37:26,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2300 transitions. [2023-09-01 12:37:26,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.46153846153847) internal successors, (2300), 26 states have internal predecessors, (2300), 0 states have call successors, (0), 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 12:37:26,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 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 12:37:26,927 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 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 12:37:26,927 INFO L175 Difference]: Start difference. First operand has 486 places, 2516 transitions, 78618 flow. Second operand 26 states and 2300 transitions. [2023-09-01 12:37:26,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 2771 transitions, 91163 flow [2023-09-01 12:37:44,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2771 transitions, 89125 flow, removed 995 selfloop flow, removed 10 redundant places. [2023-09-01 12:37:44,924 INFO L231 Difference]: Finished difference. Result has 514 places, 2653 transitions, 85915 flow [2023-09-01 12:37:44,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=76580, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=85915, PETRI_PLACES=514, PETRI_TRANSITIONS=2653} [2023-09-01 12:37:44,926 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 495 predicate places. [2023-09-01 12:37:44,927 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 2653 transitions, 85915 flow [2023-09-01 12:37:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 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 12:37:44,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:37:44,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:37:44,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 12:37:45,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:37:45,131 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:37:45,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:37:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash -155023124, now seen corresponding path program 22 times [2023-09-01 12:37:45,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:37:45,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197066857] [2023-09-01 12:37:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:37:45,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:37:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:37:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:45,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:37:45,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197066857] [2023-09-01 12:37:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197066857] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:37:45,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380459281] [2023-09-01 12:37:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:37:45,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:37:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:37:45,377 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:37:45,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 12:37:45,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:37:45,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:37:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:37:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:37:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:45,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:37:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:46,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380459281] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:37:46,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:37:46,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 12:37:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953723283] [2023-09-01 12:37:46,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:37:46,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:37:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:37:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:37:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:37:47,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:37:47,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 2653 transitions, 85915 flow. Second operand has 22 states, 22 states have (on average 93.27272727272727) internal successors, (2052), 22 states have internal predecessors, (2052), 0 states have call successors, (0), 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 12:37:47,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:37:47,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:37:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:37:52,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:38:18,440 INFO L130 PetriNetUnfolder]: 13216/24952 cut-off events. [2023-09-01 12:38:18,440 INFO L131 PetriNetUnfolder]: For 1492146/1492146 co-relation queries the response was YES. [2023-09-01 12:38:18,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333661 conditions, 24952 events. 13216/24952 cut-off events. For 1492146/1492146 co-relation queries the response was YES. Maximal size of possible extension queue 1368. Compared 223715 event pairs, 1179 based on Foata normal form. 13/24965 useless extension candidates. Maximal degree in co-relation 332219. Up to 12460 conditions per place. [2023-09-01 12:38:18,870 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1575 selfloop transitions, 1331 changer transitions 23/2929 dead transitions. [2023-09-01 12:38:18,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 2929 transitions, 100406 flow [2023-09-01 12:38:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:38:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:38:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2219 transitions. [2023-09-01 12:38:18,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43070652173913043 [2023-09-01 12:38:18,873 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2219 transitions. [2023-09-01 12:38:18,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2219 transitions. [2023-09-01 12:38:18,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:38:18,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2219 transitions. [2023-09-01 12:38:18,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 96.47826086956522) internal successors, (2219), 23 states have internal predecessors, (2219), 0 states have call successors, (0), 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 12:38:18,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 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 12:38:18,877 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 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 12:38:18,877 INFO L175 Difference]: Start difference. First operand has 514 places, 2653 transitions, 85915 flow. Second operand 23 states and 2219 transitions. [2023-09-01 12:38:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 2929 transitions, 100406 flow [2023-09-01 12:38:39,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2929 transitions, 99010 flow, removed 690 selfloop flow, removed 5 redundant places. [2023-09-01 12:38:39,237 INFO L231 Difference]: Finished difference. Result has 542 places, 2812 transitions, 93892 flow [2023-09-01 12:38:39,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=84519, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=93892, PETRI_PLACES=542, PETRI_TRANSITIONS=2812} [2023-09-01 12:38:39,239 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 523 predicate places. [2023-09-01 12:38:39,239 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 2812 transitions, 93892 flow [2023-09-01 12:38:39,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.27272727272727) internal successors, (2052), 22 states have internal predecessors, (2052), 0 states have call successors, (0), 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 12:38:39,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:38:39,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:38:39,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 12:38:39,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:38:39,443 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:38:39,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:38:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash -641647828, now seen corresponding path program 23 times [2023-09-01 12:38:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:38:39,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186567598] [2023-09-01 12:38:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:38:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:38:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:38:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:38:39,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:38:39,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186567598] [2023-09-01 12:38:39,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186567598] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:38:39,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640420654] [2023-09-01 12:38:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:38:39,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:38:39,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:38:39,759 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:38:39,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 12:38:39,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:38:39,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:38:39,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:38:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:38:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:38:40,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:38:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:38:40,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640420654] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:38:40,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:38:40,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-09-01 12:38:40,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130554967] [2023-09-01 12:38:40,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:38:40,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:38:40,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:38:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:38:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:38:41,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:38:41,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 2812 transitions, 93892 flow. Second operand has 21 states, 21 states have (on average 93.38095238095238) internal successors, (1961), 21 states have internal predecessors, (1961), 0 states have call successors, (0), 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 12:38:41,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:38:41,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:38:41,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:38:44,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 12:39:08,896 INFO L130 PetriNetUnfolder]: 13906/26265 cut-off events. [2023-09-01 12:39:08,896 INFO L131 PetriNetUnfolder]: For 1634903/1634903 co-relation queries the response was YES. [2023-09-01 12:39:09,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357115 conditions, 26265 events. 13906/26265 cut-off events. For 1634903/1634903 co-relation queries the response was YES. Maximal size of possible extension queue 1451. Compared 237905 event pairs, 1229 based on Foata normal form. 8/26273 useless extension candidates. Maximal degree in co-relation 354915. Up to 13053 conditions per place. [2023-09-01 12:39:09,398 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1686 selfloop transitions, 1425 changer transitions 48/3159 dead transitions. [2023-09-01 12:39:09,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 3159 transitions, 110916 flow [2023-09-01 12:39:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 12:39:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 12:39:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2326 transitions. [2023-09-01 12:39:09,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266369047619047 [2023-09-01 12:39:09,401 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2326 transitions. [2023-09-01 12:39:09,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2326 transitions. [2023-09-01 12:39:09,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:39:09,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2326 transitions. [2023-09-01 12:39:09,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.91666666666667) internal successors, (2326), 24 states have internal predecessors, (2326), 0 states have call successors, (0), 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 12:39:09,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 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 12:39:09,405 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 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 12:39:09,405 INFO L175 Difference]: Start difference. First operand has 542 places, 2812 transitions, 93892 flow. Second operand 24 states and 2326 transitions. [2023-09-01 12:39:09,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 3159 transitions, 110916 flow [2023-09-01 12:39:32,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 3159 transitions, 108705 flow, removed 1095 selfloop flow, removed 6 redundant places. [2023-09-01 12:39:32,759 INFO L231 Difference]: Finished difference. Result has 570 places, 3016 transitions, 105307 flow [2023-09-01 12:39:32,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=91681, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=105307, PETRI_PLACES=570, PETRI_TRANSITIONS=3016} [2023-09-01 12:39:32,761 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 551 predicate places. [2023-09-01 12:39:32,761 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 3016 transitions, 105307 flow [2023-09-01 12:39:32,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 93.38095238095238) internal successors, (1961), 21 states have internal predecessors, (1961), 0 states have call successors, (0), 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 12:39:32,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:39:32,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:39:32,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 12:39:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:39:32,962 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:39:32,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:39:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash -428826602, now seen corresponding path program 24 times [2023-09-01 12:39:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:39:32,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014819180] [2023-09-01 12:39:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:39:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:39:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:39:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:39:33,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:39:33,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014819180] [2023-09-01 12:39:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014819180] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:39:33,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833994517] [2023-09-01 12:39:33,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:39:33,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:39:33,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:39:33,254 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:39:33,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 12:39:33,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:39:33,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:39:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 12:39:33,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:39:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:39:33,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:39:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:39:34,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833994517] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:39:34,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:39:34,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-09-01 12:39:34,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379860103] [2023-09-01 12:39:34,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:39:34,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 12:39:34,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:39:34,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 12:39:34,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:39:35,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:39:35,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 3016 transitions, 105307 flow. Second operand has 23 states, 23 states have (on average 93.26086956521739) internal successors, (2145), 23 states have internal predecessors, (2145), 0 states have call successors, (0), 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 12:39:35,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:39:35,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:39:35,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:40:10,486 INFO L130 PetriNetUnfolder]: 18243/34193 cut-off events. [2023-09-01 12:40:10,487 INFO L131 PetriNetUnfolder]: For 2331066/2331066 co-relation queries the response was YES. [2023-09-01 12:40:11,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495037 conditions, 34193 events. 18243/34193 cut-off events. For 2331066/2331066 co-relation queries the response was YES. Maximal size of possible extension queue 1755. Compared 318251 event pairs, 1347 based on Foata normal form. 10/34203 useless extension candidates. Maximal degree in co-relation 492700. Up to 18401 conditions per place. [2023-09-01 12:40:11,296 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2015 selfloop transitions, 2230 changer transitions 28/4273 dead transitions. [2023-09-01 12:40:11,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 4273 transitions, 161554 flow [2023-09-01 12:40:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 12:40:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 12:40:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3221 transitions. [2023-09-01 12:40:11,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435741341991342 [2023-09-01 12:40:11,299 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3221 transitions. [2023-09-01 12:40:11,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3221 transitions. [2023-09-01 12:40:11,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:40:11,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3221 transitions. [2023-09-01 12:40:11,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 97.60606060606061) internal successors, (3221), 33 states have internal predecessors, (3221), 0 states have call successors, (0), 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 12:40:11,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 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 12:40:11,305 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 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 12:40:11,305 INFO L175 Difference]: Start difference. First operand has 570 places, 3016 transitions, 105307 flow. Second operand 33 states and 3221 transitions. [2023-09-01 12:40:11,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 4273 transitions, 161554 flow [2023-09-01 12:40:52,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 4273 transitions, 159255 flow, removed 1145 selfloop flow, removed 3 redundant places. [2023-09-01 12:40:52,204 INFO L231 Difference]: Finished difference. Result has 611 places, 3884 transitions, 151130 flow [2023-09-01 12:40:52,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=103444, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=151130, PETRI_PLACES=611, PETRI_TRANSITIONS=3884} [2023-09-01 12:40:52,206 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 592 predicate places. [2023-09-01 12:40:52,206 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 3884 transitions, 151130 flow [2023-09-01 12:40:52,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.26086956521739) internal successors, (2145), 23 states have internal predecessors, (2145), 0 states have call successors, (0), 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 12:40:52,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:40:52,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:40:52,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 12:40:52,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:40:52,407 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:40:52,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:40:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -750093574, now seen corresponding path program 25 times [2023-09-01 12:40:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:40:52,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83697904] [2023-09-01 12:40:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:40:52,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:40:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:40:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:40:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:40:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83697904] [2023-09-01 12:40:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83697904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:40:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250718868] [2023-09-01 12:40:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:40:52,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:40:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:40:52,717 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:40:52,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 12:40:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:40:53,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 12:40:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:40:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:40:53,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:40:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:40:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250718868] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:40:53,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:40:53,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-09-01 12:40:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636016521] [2023-09-01 12:40:53,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:40:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:40:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:40:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:40:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:40:55,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 224 [2023-09-01 12:40:55,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 3884 transitions, 151130 flow. Second operand has 21 states, 21 states have (on average 93.38095238095238) internal successors, (1961), 21 states have internal predecessors, (1961), 0 states have call successors, (0), 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 12:40:55,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:40:55,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 224 [2023-09-01 12:40:55,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15