./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --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 07:08:24,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:08:24,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:08:24,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:08:24,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:08:24,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:08:24,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:08:24,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:08:24,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:08:24,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:08:24,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:08:24,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:08:24,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:08:24,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:08:24,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:08:24,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:08:24,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:08:24,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:08:24,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:08:24,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:08:24,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:08:24,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:08:24,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:08:24,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:08:24,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:08:24,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:08:24,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:08:24,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:08:24,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:08:24,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:08:24,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:08:24,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:08:24,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:08:24,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:08:24,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:08:24,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:08:24,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:08:24,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:08:24,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:08:24,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:08:24,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:08:24,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:08:24,681 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:08:24,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:08:24,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:08:24,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:08:24,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:08:24,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:08:24,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:08:24,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:08:24,685 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:08:24,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:08:24,686 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:08:24,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:08:24,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:08:24,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:08:24,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:08:24,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:08:24,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:08:24,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:08:24,688 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:08:24,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:08:24,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:08:24,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:08:24,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:08:24,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:08:24,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:08:24,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:08:24,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:08:24,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:08:24,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:08:24,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:08:24,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:08:24,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:08:24,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:08:24,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:08:24,691 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:08:24,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:08:24,692 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:08:24,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:08:24,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:08:24,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:08:24,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:08:24,989 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:08:24,990 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:08:24,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-09-01 07:08:26,196 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:08:26,459 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:08:26,460 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-09-01 07:08:26,481 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de9a9030f/967cc248fe6e4279b8f0dd125776ff26/FLAGc7450464d [2023-09-01 07:08:26,495 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de9a9030f/967cc248fe6e4279b8f0dd125776ff26 [2023-09-01 07:08:26,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:08:26,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:08:26,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:08:26,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:08:26,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:08:26,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:08:26" (1/1) ... [2023-09-01 07:08:26,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f29b157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:26, skipping insertion in model container [2023-09-01 07:08:26,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:08:26" (1/1) ... [2023-09-01 07:08:26,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:08:26,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:08:26,927 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-09-01 07:08:26,950 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:26,950 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:26,950 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:26,951 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:26,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:08:27,023 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:08:27,058 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-09-01 07:08:27,071 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:27,072 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:27,072 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:27,073 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:08:27,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:08:27,162 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:08:27,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27 WrapperNode [2023-09-01 07:08:27,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:08:27,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:08:27,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:08:27,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:08:27,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,243 INFO L138 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 244 [2023-09-01 07:08:27,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:08:27,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:08:27,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:08:27,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:08:27,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:08:27,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:08:27,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:08:27,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:08:27,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (1/1) ... [2023-09-01 07:08:27,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:08:27,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:08:27,333 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 07:08:27,335 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 07:08:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:08:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 07:08:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 07:08:27,358 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 07:08:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:08:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:08:27,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:08:27,359 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 07:08:27,564 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:08:27,565 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:08:27,891 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:08:27,900 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:08:27,900 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 07:08:27,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:08:27 BoogieIcfgContainer [2023-09-01 07:08:27,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:08:27,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:08:27,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:08:27,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:08:27,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:08:26" (1/3) ... [2023-09-01 07:08:27,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce2299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:08:27, skipping insertion in model container [2023-09-01 07:08:27,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:08:27" (2/3) ... [2023-09-01 07:08:27,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ce2299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:08:27, skipping insertion in model container [2023-09-01 07:08:27,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:08:27" (3/3) ... [2023-09-01 07:08:27,910 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2023-09-01 07:08:27,916 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:08:27,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:08:27,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 07:08:27,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:08:28,039 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 07:08:28,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 268 transitions, 544 flow [2023-09-01 07:08:28,173 INFO L130 PetriNetUnfolder]: 29/284 cut-off events. [2023-09-01 07:08:28,173 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-09-01 07:08:28,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 284 events. 29/284 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 684 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 150. Up to 4 conditions per place. [2023-09-01 07:08:28,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 268 transitions, 544 flow [2023-09-01 07:08:28,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 253 transitions, 511 flow [2023-09-01 07:08:28,199 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:08:28,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 253 transitions, 511 flow [2023-09-01 07:08:28,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 253 transitions, 511 flow [2023-09-01 07:08:28,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 253 transitions, 511 flow [2023-09-01 07:08:28,268 INFO L130 PetriNetUnfolder]: 28/269 cut-off events. [2023-09-01 07:08:28,268 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:08:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 269 events. 28/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 567 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 144. Up to 4 conditions per place. [2023-09-01 07:08:28,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 5096 [2023-09-01 07:08:53,597 WARN L222 SmtUtils]: Spent 13.44s on a formula simplification. DAG size of input: 182 DAG size of output: 181 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:09:00,077 WARN L222 SmtUtils]: Spent 6.48s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:09:11,950 WARN L222 SmtUtils]: Spent 11.87s on a formula simplification. DAG size of input: 182 DAG size of output: 181 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:09:17,415 WARN L222 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:09:18,100 INFO L134 LiptonReduction]: Checked pairs total: 4538 [2023-09-01 07:09:18,100 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-09-01 07:09:18,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:09:18,129 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;@87d3062, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:09:18,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 07:09:18,141 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-09-01 07:09:18,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:09:18,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:18,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 07:09:18,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:18,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2092164135, now seen corresponding path program 1 times [2023-09-01 07:09:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835059628] [2023-09-01 07:09:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:18,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:09:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:09:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835059628] [2023-09-01 07:09:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835059628] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:09:18,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:09:18,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:09:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019944011] [2023-09-01 07:09:18,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:09:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:09:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:09:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:09:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:09:18,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 527 [2023-09-01 07:09:18,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 43 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 07:09:18,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:09:18,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 527 [2023-09-01 07:09:18,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:09:18,713 INFO L130 PetriNetUnfolder]: 101/224 cut-off events. [2023-09-01 07:09:18,713 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:09:18,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 224 events. 101/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 819 event pairs, 80 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 404. Up to 202 conditions per place. [2023-09-01 07:09:18,715 INFO L137 encePairwiseOnDemand]: 514/527 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-09-01 07:09:18,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 141 flow [2023-09-01 07:09:18,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:09:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:09:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 766 transitions. [2023-09-01 07:09:18,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845034788108792 [2023-09-01 07:09:18,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 766 transitions. [2023-09-01 07:09:18,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 766 transitions. [2023-09-01 07:09:18,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:09:18,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 766 transitions. [2023-09-01 07:09:18,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 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 07:09:18,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 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 07:09:18,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 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 07:09:18,752 INFO L175 Difference]: Start difference. First operand has 32 places, 43 transitions, 91 flow. Second operand 3 states and 766 transitions. [2023-09-01 07:09:18,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 141 flow [2023-09-01 07:09:18,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 141 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 07:09:18,757 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 83 flow [2023-09-01 07:09:18,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-09-01 07:09:18,762 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 07:09:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 83 flow [2023-09-01 07:09:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 07:09:18,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:18,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:09:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:09:18,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:18,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash -382407373, now seen corresponding path program 1 times [2023-09-01 07:09:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:18,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837893642] [2023-09-01 07:09:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:09:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:09:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:18,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837893642] [2023-09-01 07:09:18,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837893642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:09:18,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:09:18,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 07:09:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903221201] [2023-09-01 07:09:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:09:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:09:18,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:09:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:09:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:09:18,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 527 [2023-09-01 07:09:18,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 07:09:18,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:09:18,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 527 [2023-09-01 07:09:18,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:09:19,047 INFO L130 PetriNetUnfolder]: 101/226 cut-off events. [2023-09-01 07:09:19,047 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:09:19,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 226 events. 101/226 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 822 event pairs, 80 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 428. Up to 205 conditions per place. [2023-09-01 07:09:19,049 INFO L137 encePairwiseOnDemand]: 524/527 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-09-01 07:09:19,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 147 flow [2023-09-01 07:09:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:09:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:09:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-09-01 07:09:19,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2023-09-01 07:09:19,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-09-01 07:09:19,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-09-01 07:09:19,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:09:19,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-09-01 07:09:19,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:09:19,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 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 07:09:19,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 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 07:09:19,060 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 83 flow. Second operand 3 states and 748 transitions. [2023-09-01 07:09:19,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 147 flow [2023-09-01 07:09:19,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:09:19,062 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 95 flow [2023-09-01 07:09:19,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-09-01 07:09:19,063 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-09-01 07:09:19,063 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 95 flow [2023-09-01 07:09:19,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 07:09:19,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:19,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:09:19,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 07:09:19,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:19,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 952058791, now seen corresponding path program 1 times [2023-09-01 07:09:19,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:19,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381628463] [2023-09-01 07:09:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:19,101 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:09:19,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706239671] [2023-09-01 07:09:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:19,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:09:19,109 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 07:09:19,133 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 07:09:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:09:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:09:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:09:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:09:19,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:09:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:09:19,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:19,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381628463] [2023-09-01 07:09:19,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:09:19,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706239671] [2023-09-01 07:09:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706239671] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:09:19,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:09:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 07:09:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60718380] [2023-09-01 07:09:19,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:09:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:09:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:09:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:09:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:09:19,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 527 [2023-09-01 07:09:19,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 241.83333333333334) internal successors, (1451), 6 states have internal predecessors, (1451), 0 states have call successors, (0), 0 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 07:09:19,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:09:19,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 527 [2023-09-01 07:09:19,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:09:19,783 INFO L130 PetriNetUnfolder]: 101/232 cut-off events. [2023-09-01 07:09:19,783 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 07:09:19,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 232 events. 101/232 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 830 event pairs, 80 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 435. Up to 205 conditions per place. [2023-09-01 07:09:19,786 INFO L137 encePairwiseOnDemand]: 524/527 looper letters, 29 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-09-01 07:09:19,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 175 flow [2023-09-01 07:09:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:09:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:09:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1476 transitions. [2023-09-01 07:09:19,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4667931688804554 [2023-09-01 07:09:19,791 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1476 transitions. [2023-09-01 07:09:19,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1476 transitions. [2023-09-01 07:09:19,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:09:19,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1476 transitions. [2023-09-01 07:09:19,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 07:09:19,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 527.0) internal successors, (3689), 7 states have internal predecessors, (3689), 0 states have call successors, (0), 0 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 07:09:19,803 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 527.0) internal successors, (3689), 7 states have internal predecessors, (3689), 0 states have call successors, (0), 0 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 07:09:19,803 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 95 flow. Second operand 6 states and 1476 transitions. [2023-09-01 07:09:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 175 flow [2023-09-01 07:09:19,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 171 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 07:09:19,806 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 133 flow [2023-09-01 07:09:19,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-09-01 07:09:19,807 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2023-09-01 07:09:19,807 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 133 flow [2023-09-01 07:09:19,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 241.83333333333334) internal successors, (1451), 6 states have internal predecessors, (1451), 0 states have call successors, (0), 0 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 07:09:19,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:19,809 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:09:19,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 07:09:20,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:20,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:20,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1538201037, now seen corresponding path program 2 times [2023-09-01 07:09:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572754688] [2023-09-01 07:09:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:20,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:09:20,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914219927] [2023-09-01 07:09:20,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:09:20,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:09:20,103 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 07:09:20,106 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 07:09:20,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:09:20,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:09:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:09:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:09:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:09:20,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:09:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:09:20,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572754688] [2023-09-01 07:09:20,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:09:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914219927] [2023-09-01 07:09:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914219927] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:09:20,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:09:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 07:09:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857339672] [2023-09-01 07:09:20,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:09:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 07:09:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:09:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 07:09:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 07:09:20,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 527 [2023-09-01 07:09:20,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 133 flow. Second operand has 12 states, 12 states have (on average 241.41666666666666) internal successors, (2897), 12 states have internal predecessors, (2897), 0 states have call successors, (0), 0 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 07:09:20,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:09:20,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 527 [2023-09-01 07:09:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:09:21,103 INFO L130 PetriNetUnfolder]: 101/244 cut-off events. [2023-09-01 07:09:21,103 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-09-01 07:09:21,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 244 events. 101/244 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 885 event pairs, 80 based on Foata normal form. 12/156 useless extension candidates. Maximal degree in co-relation 431. Up to 205 conditions per place. [2023-09-01 07:09:21,105 INFO L137 encePairwiseOnDemand]: 524/527 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2023-09-01 07:09:21,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 249 flow [2023-09-01 07:09:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:09:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:09:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2925 transitions. [2023-09-01 07:09:21,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625237191650854 [2023-09-01 07:09:21,112 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2925 transitions. [2023-09-01 07:09:21,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2925 transitions. [2023-09-01 07:09:21,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:09:21,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2925 transitions. [2023-09-01 07:09:21,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.75) internal successors, (2925), 12 states have internal predecessors, (2925), 0 states have call successors, (0), 0 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 07:09:21,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 527.0) internal successors, (6851), 13 states have internal predecessors, (6851), 0 states have call successors, (0), 0 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 07:09:21,132 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 527.0) internal successors, (6851), 13 states have internal predecessors, (6851), 0 states have call successors, (0), 0 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 07:09:21,133 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 133 flow. Second operand 12 states and 2925 transitions. [2023-09-01 07:09:21,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 249 flow [2023-09-01 07:09:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 235 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 07:09:21,135 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 215 flow [2023-09-01 07:09:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-09-01 07:09:21,136 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-09-01 07:09:21,137 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 215 flow [2023-09-01 07:09:21,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 241.41666666666666) internal successors, (2897), 12 states have internal predecessors, (2897), 0 states have call successors, (0), 0 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 07:09:21,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:21,138 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:09:21,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 07:09:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 07:09:21,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:21,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2114275917, now seen corresponding path program 3 times [2023-09-01 07:09:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:21,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34021216] [2023-09-01 07:09:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:21,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:09:21,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297699518] [2023-09-01 07:09:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:09:21,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:09:21,490 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 07:09:21,514 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 07:09:21,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 07:09:21,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:09:21,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:09:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:09:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 07:09:21,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:09:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 07:09:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34021216] [2023-09-01 07:09:22,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:09:22,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297699518] [2023-09-01 07:09:22,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297699518] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:09:22,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:09:22,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 07:09:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198794727] [2023-09-01 07:09:22,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:09:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:09:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:09:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:09:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:09:22,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 527 [2023-09-01 07:09:22,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 242.16666666666666) internal successors, (1453), 6 states have internal predecessors, (1453), 0 states have call successors, (0), 0 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 07:09:22,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:09:22,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 527 [2023-09-01 07:09:22,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:09:22,571 INFO L130 PetriNetUnfolder]: 103/271 cut-off events. [2023-09-01 07:09:22,571 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-09-01 07:09:22,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 271 events. 103/271 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 815 event pairs, 80 based on Foata normal form. 3/174 useless extension candidates. Maximal degree in co-relation 432. Up to 199 conditions per place. [2023-09-01 07:09:22,573 INFO L137 encePairwiseOnDemand]: 523/527 looper letters, 73 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2023-09-01 07:09:22,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 722 flow [2023-09-01 07:09:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:09:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:09:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1482 transitions. [2023-09-01 07:09:22,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4686907020872865 [2023-09-01 07:09:22,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1482 transitions. [2023-09-01 07:09:22,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1482 transitions. [2023-09-01 07:09:22,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:09:22,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1482 transitions. [2023-09-01 07:09:22,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 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 07:09:22,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 527.0) internal successors, (3689), 7 states have internal predecessors, (3689), 0 states have call successors, (0), 0 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 07:09:22,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 527.0) internal successors, (3689), 7 states have internal predecessors, (3689), 0 states have call successors, (0), 0 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 07:09:22,586 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 215 flow. Second operand 6 states and 1482 transitions. [2023-09-01 07:09:22,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 722 flow [2023-09-01 07:09:22,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 528 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-09-01 07:09:22,598 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 250 flow [2023-09-01 07:09:22,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-09-01 07:09:22,600 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2023-09-01 07:09:22,600 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 250 flow [2023-09-01 07:09:22,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 242.16666666666666) internal successors, (1453), 6 states have internal predecessors, (1453), 0 states have call successors, (0), 0 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 07:09:22,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:22,601 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:09:22,611 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 07:09:22,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:22,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:22,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:22,810 INFO L85 PathProgramCache]: Analyzing trace with hash 545226327, now seen corresponding path program 4 times [2023-09-01 07:09:22,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:22,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671045290] [2023-09-01 07:09:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:22,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:23,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:09:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776789192] [2023-09-01 07:09:23,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 07:09:23,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:23,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:09:23,230 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 07:09:23,254 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 07:09:25,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 07:09:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:09:25,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 9627 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 07:09:25,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:09:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-09-01 07:09:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:09:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-09-01 07:09:26,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:09:26,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671045290] [2023-09-01 07:09:26,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:09:26,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776789192] [2023-09-01 07:09:26,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776789192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:09:26,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:09:26,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-09-01 07:09:26,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809260877] [2023-09-01 07:09:26,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:09:26,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 07:09:26,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:09:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 07:09:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-09-01 07:09:26,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 527 [2023-09-01 07:09:26,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 250 flow. Second operand has 24 states, 24 states have (on average 241.33333333333334) internal successors, (5792), 24 states have internal predecessors, (5792), 0 states have call successors, (0), 0 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 07:09:26,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:09:26,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 527 [2023-09-01 07:09:26,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:09:27,897 INFO L130 PetriNetUnfolder]: 103/319 cut-off events. [2023-09-01 07:09:27,898 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-09-01 07:09:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 319 events. 103/319 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 815 event pairs, 80 based on Foata normal form. 48/267 useless extension candidates. Maximal degree in co-relation 437. Up to 211 conditions per place. [2023-09-01 07:09:27,899 INFO L137 encePairwiseOnDemand]: 524/527 looper letters, 31 selfloop transitions, 24 changer transitions 0/59 dead transitions. [2023-09-01 07:09:27,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 59 transitions, 432 flow [2023-09-01 07:09:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:09:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:09:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5823 transitions. [2023-09-01 07:09:27,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603889943074004 [2023-09-01 07:09:27,914 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5823 transitions. [2023-09-01 07:09:27,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5823 transitions. [2023-09-01 07:09:27,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:09:27,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5823 transitions. [2023-09-01 07:09:27,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 242.625) internal successors, (5823), 24 states have internal predecessors, (5823), 0 states have call successors, (0), 0 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 07:09:27,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 527.0) internal successors, (13175), 25 states have internal predecessors, (13175), 0 states have call successors, (0), 0 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 07:09:27,965 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 527.0) internal successors, (13175), 25 states have internal predecessors, (13175), 0 states have call successors, (0), 0 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 07:09:27,965 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 250 flow. Second operand 24 states and 5823 transitions. [2023-09-01 07:09:27,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 59 transitions, 432 flow [2023-09-01 07:09:27,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 59 transitions, 424 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 07:09:27,970 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 484 flow [2023-09-01 07:09:27,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=484, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2023-09-01 07:09:27,973 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2023-09-01 07:09:27,973 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 484 flow [2023-09-01 07:09:27,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 241.33333333333334) internal successors, (5792), 24 states have internal predecessors, (5792), 0 states have call successors, (0), 0 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 07:09:27,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:09:27,975 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:09:28,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 07:09:28,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:28,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:09:28,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:09:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash -355815849, now seen corresponding path program 5 times [2023-09-01 07:09:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:09:28,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149776947] [2023-09-01 07:09:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:09:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:09:29,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:09:29,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659091402] [2023-09-01 07:09:29,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 07:09:29,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:09:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:09:29,025 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 07:09:29,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15