./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.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_90-arrayloop2_racing.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 f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --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 07:06:08,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:06:08,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:06:08,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:06:08,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:06:08,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:06:08,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:06:08,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:06:08,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:06:08,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:06:08,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:06:08,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:06:08,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:06:08,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:06:08,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:06:08,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:06:08,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:06:08,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:06:08,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:06:08,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:06:08,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:06:08,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:06:08,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:06:08,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:06:08,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:06:08,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:06:08,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:06:08,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:06:08,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:06:08,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:06:08,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:06:08,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:06:08,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:06:08,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:06:08,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:06:08,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:06:08,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:06:08,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:06:08,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:06:08,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:06:08,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:06:08,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:06:08,534 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:06:08,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:06:08,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:06:08,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:06:08,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:06:08,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:06:08,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:06:08,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:06:08,538 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:06:08,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:06:08,539 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:06:08,539 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:06:08,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:06:08,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:06:08,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:06:08,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:06:08,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:06:08,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:06:08,540 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:06:08,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:06:08,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:06:08,541 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:06:08,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:06:08,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:06:08,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:06:08,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:06:08,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:08,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:06:08,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:06:08,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:06:08,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:06:08,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:06:08,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:06:08,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:06:08,544 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:06:08,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:06:08,544 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:06:08,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:06:08,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:06:08,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:06:08,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:06:08,846 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:06:08,846 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:06:08,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-09-01 07:06:10,034 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:06:10,331 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:06:10,332 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2023-09-01 07:06:10,345 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8232f83/cb732b35383748b6a69221dc5e348beb/FLAGf9c132445 [2023-09-01 07:06:10,364 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8232f83/cb732b35383748b6a69221dc5e348beb [2023-09-01 07:06:10,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:06:10,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:06:10,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:10,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:06:10,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:06:10,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:10" (1/1) ... [2023-09-01 07:06:10,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5637fa33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:10, skipping insertion in model container [2023-09-01 07:06:10,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:06:10" (1/1) ... [2023-09-01 07:06:10,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:06:10,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:06:10,804 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_90-arrayloop2_racing.i[47038,47051] [2023-09-01 07:06:10,819 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,820 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,820 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,821 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:10,947 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:06:10,988 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_90-arrayloop2_racing.i[47038,47051] [2023-09-01 07:06:10,991 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,991 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,991 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:10,992 WARN L1562 CHandler]: Possible shadowing of function new [2023-09-01 07:06:11,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:06:11,083 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:06:11,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11 WrapperNode [2023-09-01 07:06:11,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:06:11,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:11,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:06:11,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:06:11,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,162 INFO L138 Inliner]: procedures = 278, calls = 64, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 332 [2023-09-01 07:06:11,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:06:11,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:06:11,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:06:11,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:06:11,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,225 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:06:11,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:06:11,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:06:11,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:06:11,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (1/1) ... [2023-09-01 07:06:11,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:06:11,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:11,260 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 07:06:11,271 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 07:06:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:06:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 07:06:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-09-01 07:06:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-09-01 07:06:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:06:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:06:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-09-01 07:06:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:06:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:06:11,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:06:11,301 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 07:06:11,508 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:06:11,510 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:06:11,929 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:06:11,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:06:11,942 INFO L302 CfgBuilder]: Removed 30 assume(true) statements. [2023-09-01 07:06:11,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:11 BoogieIcfgContainer [2023-09-01 07:06:11,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:06:11,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:06:11,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:06:11,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:06:11,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:06:10" (1/3) ... [2023-09-01 07:06:11,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e24fbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:06:11, skipping insertion in model container [2023-09-01 07:06:11,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:06:11" (2/3) ... [2023-09-01 07:06:11,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e24fbd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:06:11, skipping insertion in model container [2023-09-01 07:06:11,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:06:11" (3/3) ... [2023-09-01 07:06:11,954 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2023-09-01 07:06:11,960 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:06:11,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:06:11,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-09-01 07:06:11,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:06:12,109 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 07:06:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 356 transitions, 734 flow [2023-09-01 07:06:12,327 INFO L130 PetriNetUnfolder]: 77/582 cut-off events. [2023-09-01 07:06:12,327 INFO L131 PetriNetUnfolder]: For 8/13 co-relation queries the response was YES. [2023-09-01 07:06:12,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 582 events. 77/582 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2882 event pairs, 0 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 297. Up to 8 conditions per place. [2023-09-01 07:06:12,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 356 transitions, 734 flow [2023-09-01 07:06:12,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 350 transitions, 722 flow [2023-09-01 07:06:12,357 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:06:12,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 309 places, 350 transitions, 722 flow [2023-09-01 07:06:12,385 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 309 places, 350 transitions, 722 flow [2023-09-01 07:06:12,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 350 transitions, 722 flow [2023-09-01 07:06:12,468 INFO L130 PetriNetUnfolder]: 77/576 cut-off events. [2023-09-01 07:06:12,469 INFO L131 PetriNetUnfolder]: For 8/13 co-relation queries the response was YES. [2023-09-01 07:06:12,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 576 events. 77/576 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2841 event pairs, 0 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 297. Up to 8 conditions per place. [2023-09-01 07:06:12,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 44116 [2023-09-01 07:06:30,329 WARN L222 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 190 DAG size of output: 188 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:06:46,841 WARN L222 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 190 DAG size of output: 188 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 07:06:51,310 INFO L134 LiptonReduction]: Checked pairs total: 68658 [2023-09-01 07:06:51,311 INFO L136 LiptonReduction]: Total number of compositions: 317 [2023-09-01 07:06:51,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 07:06:51,328 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;@44fd25f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:06:51,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-09-01 07:06:51,334 INFO L130 PetriNetUnfolder]: 2/33 cut-off events. [2023-09-01 07:06:51,334 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:06:51,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:51,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 07:06:51,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:51,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -561616818, now seen corresponding path program 1 times [2023-09-01 07:06:51,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:51,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764738357] [2023-09-01 07:06:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:51,626 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 07:06:51,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764738357] [2023-09-01 07:06:51,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764738357] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:06:51,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:06:51,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:06:51,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960436403] [2023-09-01 07:06:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:06:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:06:51,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:06:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:06:51,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 673 [2023-09-01 07:06:51,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 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 07:06:51,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:51,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 673 [2023-09-01 07:06:51,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:53,869 INFO L130 PetriNetUnfolder]: 11405/18101 cut-off events. [2023-09-01 07:06:53,870 INFO L131 PetriNetUnfolder]: For 256/256 co-relation queries the response was YES. [2023-09-01 07:06:53,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35046 conditions, 18101 events. 11405/18101 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 120297 event pairs, 9876 based on Foata normal form. 1698/12886 useless extension candidates. Maximal degree in co-relation 33358. Up to 16784 conditions per place. [2023-09-01 07:06:53,966 INFO L137 encePairwiseOnDemand]: 648/673 looper letters, 65 selfloop transitions, 2 changer transitions 16/94 dead transitions. [2023-09-01 07:06:53,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 94 transitions, 372 flow [2023-09-01 07:06:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:06:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:06:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2023-09-01 07:06:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121347201584943 [2023-09-01 07:06:54,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2023-09-01 07:06:54,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2023-09-01 07:06:54,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:54,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2023-09-01 07:06:54,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 07:06:54,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 673.0) internal successors, (2692), 4 states have internal predecessors, (2692), 0 states have call successors, (0), 0 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 07:06:54,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 673.0) internal successors, (2692), 4 states have internal predecessors, (2692), 0 states have call successors, (0), 0 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 07:06:54,082 INFO L175 Difference]: Start difference. First operand has 86 places, 113 transitions, 248 flow. Second operand 3 states and 1034 transitions. [2023-09-01 07:06:54,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 94 transitions, 372 flow [2023-09-01 07:06:54,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 94 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 07:06:54,109 INFO L231 Difference]: Finished difference. Result has 87 places, 76 transitions, 172 flow [2023-09-01 07:06:54,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2023-09-01 07:06:54,119 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 1 predicate places. [2023-09-01 07:06:54,127 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 172 flow [2023-09-01 07:06:54,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 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 07:06:54,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:54,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:06:54,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:06:54,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:54,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1776003442, now seen corresponding path program 1 times [2023-09-01 07:06:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:54,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677878116] [2023-09-01 07:06:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:54,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:54,220 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 07:06:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677878116] [2023-09-01 07:06:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677878116] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:06:54,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:06:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 07:06:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713230443] [2023-09-01 07:06:54,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:06:54,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:06:54,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:06:54,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:06:54,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 673 [2023-09-01 07:06:54,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 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 07:06:54,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:54,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 673 [2023-09-01 07:06:54,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:55,166 INFO L130 PetriNetUnfolder]: 6421/10263 cut-off events. [2023-09-01 07:06:55,166 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 07:06:55,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19847 conditions, 10263 events. 6421/10263 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 62409 event pairs, 5578 based on Foata normal form. 2/6273 useless extension candidates. Maximal degree in co-relation 19828. Up to 9511 conditions per place. [2023-09-01 07:06:55,214 INFO L137 encePairwiseOnDemand]: 670/673 looper letters, 64 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-09-01 07:06:55,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 306 flow [2023-09-01 07:06:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:06:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:06:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 990 transitions. [2023-09-01 07:06:55,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4903417533432392 [2023-09-01 07:06:55,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 990 transitions. [2023-09-01 07:06:55,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 990 transitions. [2023-09-01 07:06:55,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:55,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 990 transitions. [2023-09-01 07:06:55,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:06:55,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 673.0) internal successors, (2692), 4 states have internal predecessors, (2692), 0 states have call successors, (0), 0 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 07:06:55,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 673.0) internal successors, (2692), 4 states have internal predecessors, (2692), 0 states have call successors, (0), 0 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 07:06:55,227 INFO L175 Difference]: Start difference. First operand has 87 places, 76 transitions, 172 flow. Second operand 3 states and 990 transitions. [2023-09-01 07:06:55,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 306 flow [2023-09-01 07:06:55,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:55,231 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 184 flow [2023-09-01 07:06:55,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2023-09-01 07:06:55,232 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -9 predicate places. [2023-09-01 07:06:55,232 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 184 flow [2023-09-01 07:06:55,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 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 07:06:55,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:55,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:06:55,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 07:06:55,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:55,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 294082624, now seen corresponding path program 1 times [2023-09-01 07:06:55,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:55,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495439933] [2023-09-01 07:06:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:55,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:55,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:06:55,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965020884] [2023-09-01 07:06:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:55,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:55,303 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 07:06:55,322 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 07:06:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:06:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:06:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:06:55,567 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 07:06:55,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:06:55,584 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 07:06:55,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:55,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495439933] [2023-09-01 07:06:55,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:06:55,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965020884] [2023-09-01 07:06:55,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965020884] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:06:55,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:06:55,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-09-01 07:06:55,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711564673] [2023-09-01 07:06:55,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:06:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:06:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:06:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:06:55,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 673 [2023-09-01 07:06:55,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 310.8333333333333) internal successors, (1865), 6 states have internal predecessors, (1865), 0 states have call successors, (0), 0 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 07:06:55,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:55,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 673 [2023-09-01 07:06:55,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:56,825 INFO L130 PetriNetUnfolder]: 6421/10269 cut-off events. [2023-09-01 07:06:56,826 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 07:06:56,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19875 conditions, 10269 events. 6421/10269 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 62470 event pairs, 5578 based on Foata normal form. 6/6283 useless extension candidates. Maximal degree in co-relation 19835. Up to 9511 conditions per place. [2023-09-01 07:06:56,877 INFO L137 encePairwiseOnDemand]: 670/673 looper letters, 64 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-09-01 07:06:56,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 334 flow [2023-09-01 07:06:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:06:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:06:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1925 transitions. [2023-09-01 07:06:56,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47672114908370483 [2023-09-01 07:06:56,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1925 transitions. [2023-09-01 07:06:56,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1925 transitions. [2023-09-01 07:06:56,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:56,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1925 transitions. [2023-09-01 07:06:56,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.8333333333333) internal successors, (1925), 6 states have internal predecessors, (1925), 0 states have call successors, (0), 0 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 07:06:56,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 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 07:06:56,899 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 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 07:06:56,899 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 184 flow. Second operand 6 states and 1925 transitions. [2023-09-01 07:06:56,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 334 flow [2023-09-01 07:06:56,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 330 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:56,902 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 222 flow [2023-09-01 07:06:56,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-09-01 07:06:56,903 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -2 predicate places. [2023-09-01 07:06:56,904 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 222 flow [2023-09-01 07:06:56,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.8333333333333) internal successors, (1865), 6 states have internal predecessors, (1865), 0 states have call successors, (0), 0 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 07:06:56,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:56,905 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:06:56,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 07:06:57,112 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 07:06:57,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:57,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash -826807054, now seen corresponding path program 2 times [2023-09-01 07:06:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:57,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416801379] [2023-09-01 07:06:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:57,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:57,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:06:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301195381] [2023-09-01 07:06:57,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:06:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:57,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:57,198 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 07:06:57,205 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 07:06:57,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:06:57,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:06:57,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:06:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:06:57,581 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 07:06:57,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:06:57,633 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 07:06:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:06:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416801379] [2023-09-01 07:06:57,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:06:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301195381] [2023-09-01 07:06:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301195381] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:06:57,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:06:57,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-09-01 07:06:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078638643] [2023-09-01 07:06:57,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:06:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 07:06:57,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:06:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 07:06:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-09-01 07:06:57,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 673 [2023-09-01 07:06:57,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 222 flow. Second operand has 12 states, 12 states have (on average 310.4166666666667) internal successors, (3725), 12 states have internal predecessors, (3725), 0 states have call successors, (0), 0 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 07:06:57,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:06:57,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 673 [2023-09-01 07:06:57,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:06:59,194 INFO L130 PetriNetUnfolder]: 6421/10281 cut-off events. [2023-09-01 07:06:59,195 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-09-01 07:06:59,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19946 conditions, 10281 events. 6421/10281 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 62569 event pairs, 5578 based on Foata normal form. 12/6301 useless extension candidates. Maximal degree in co-relation 19831. Up to 9511 conditions per place. [2023-09-01 07:06:59,238 INFO L137 encePairwiseOnDemand]: 670/673 looper letters, 64 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-09-01 07:06:59,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 408 flow [2023-09-01 07:06:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:06:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:06:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3788 transitions. [2023-09-01 07:06:59,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904408122833086 [2023-09-01 07:06:59,248 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3788 transitions. [2023-09-01 07:06:59,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3788 transitions. [2023-09-01 07:06:59,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:06:59,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3788 transitions. [2023-09-01 07:06:59,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 315.6666666666667) internal successors, (3788), 12 states have internal predecessors, (3788), 0 states have call successors, (0), 0 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 07:06:59,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 673.0) internal successors, (8749), 13 states have internal predecessors, (8749), 0 states have call successors, (0), 0 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 07:06:59,276 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 673.0) internal successors, (8749), 13 states have internal predecessors, (8749), 0 states have call successors, (0), 0 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 07:06:59,277 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 222 flow. Second operand 12 states and 3788 transitions. [2023-09-01 07:06:59,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 408 flow [2023-09-01 07:06:59,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 07:06:59,284 INFO L231 Difference]: Finished difference. Result has 100 places, 86 transitions, 304 flow [2023-09-01 07:06:59,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=304, PETRI_PLACES=100, PETRI_TRANSITIONS=86} [2023-09-01 07:06:59,286 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2023-09-01 07:06:59,286 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 86 transitions, 304 flow [2023-09-01 07:06:59,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 310.4166666666667) internal successors, (3725), 12 states have internal predecessors, (3725), 0 states have call successors, (0), 0 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 07:06:59,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:06:59,288 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:06:59,297 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 07:06:59,496 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 07:06:59,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:06:59,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:06:59,497 INFO L85 PathProgramCache]: Analyzing trace with hash 44468786, now seen corresponding path program 3 times [2023-09-01 07:06:59,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:06:59,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845665190] [2023-09-01 07:06:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:06:59,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:06:59,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:06:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059070050] [2023-09-01 07:06:59,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:06:59,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:06:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:06:59,628 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 07:06:59,656 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 07:07:00,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 07:07:00,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:07:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 07:07:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:07:00,044 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 07:07:00,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:07:00,083 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 07:07:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:00,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845665190] [2023-09-01 07:07:00,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:07:00,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059070050] [2023-09-01 07:07:00,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059070050] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:07:00,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:07:00,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-09-01 07:07:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568270720] [2023-09-01 07:07:00,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:07:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:07:00,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:07:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:07:00,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 673 [2023-09-01 07:07:00,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 86 transitions, 304 flow. Second operand has 6 states, 6 states have (on average 311.1666666666667) internal successors, (1867), 6 states have internal predecessors, (1867), 0 states have call successors, (0), 0 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 07:07:00,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:00,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 673 [2023-09-01 07:07:00,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:01,506 INFO L130 PetriNetUnfolder]: 6429/10304 cut-off events. [2023-09-01 07:07:01,507 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-09-01 07:07:01,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20131 conditions, 10304 events. 6429/10304 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 62286 event pairs, 5578 based on Foata normal form. 3/6291 useless extension candidates. Maximal degree in co-relation 19824. Up to 9505 conditions per place. [2023-09-01 07:07:01,551 INFO L137 encePairwiseOnDemand]: 669/673 looper letters, 108 selfloop transitions, 6 changer transitions 0/125 dead transitions. [2023-09-01 07:07:01,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 125 transitions, 881 flow [2023-09-01 07:07:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:07:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:07:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1931 transitions. [2023-09-01 07:07:01,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47820703318474495 [2023-09-01 07:07:01,557 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1931 transitions. [2023-09-01 07:07:01,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1931 transitions. [2023-09-01 07:07:01,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:01,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1931 transitions. [2023-09-01 07:07:01,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 321.8333333333333) internal successors, (1931), 6 states have internal predecessors, (1931), 0 states have call successors, (0), 0 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 07:07:01,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 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 07:07:01,568 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 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 07:07:01,568 INFO L175 Difference]: Start difference. First operand has 100 places, 86 transitions, 304 flow. Second operand 6 states and 1931 transitions. [2023-09-01 07:07:01,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 125 transitions, 881 flow [2023-09-01 07:07:01,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 125 transitions, 687 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-09-01 07:07:01,572 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 339 flow [2023-09-01 07:07:01,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=104, PETRI_TRANSITIONS=89} [2023-09-01 07:07:01,573 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2023-09-01 07:07:01,574 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 339 flow [2023-09-01 07:07:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 311.1666666666667) internal successors, (1867), 6 states have internal predecessors, (1867), 0 states have call successors, (0), 0 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 07:07:01,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:01,575 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:07:01,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 07:07:01,782 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 07:07:01,782 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:01,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1203983394, now seen corresponding path program 4 times [2023-09-01 07:07:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:01,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200788671] [2023-09-01 07:07:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:02,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:02,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736468236] [2023-09-01 07:07:02,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 07:07:02,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:02,186 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 07:07:02,220 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 07:07:04,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 07:07:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:07:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 9635 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 07:07:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:07:04,576 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 07:07:04,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:07:04,780 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 07:07:04,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:07:04,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200788671] [2023-09-01 07:07:04,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-09-01 07:07:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736468236] [2023-09-01 07:07:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736468236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:07:04,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 07:07:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-09-01 07:07:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682122758] [2023-09-01 07:07:04,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 07:07:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 07:07:04,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:07:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 07:07:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-09-01 07:07:04,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 673 [2023-09-01 07:07:04,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 89 transitions, 339 flow. Second operand has 24 states, 24 states have (on average 310.3333333333333) internal successors, (7448), 24 states have internal predecessors, (7448), 0 states have call successors, (0), 0 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 07:07:04,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:07:04,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 673 [2023-09-01 07:07:04,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:07:07,298 INFO L130 PetriNetUnfolder]: 6429/10352 cut-off events. [2023-09-01 07:07:07,298 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-09-01 07:07:07,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 10352 events. 6429/10352 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 62275 event pairs, 5578 based on Foata normal form. 48/6384 useless extension candidates. Maximal degree in co-relation 19829. Up to 9517 conditions per place. [2023-09-01 07:07:07,340 INFO L137 encePairwiseOnDemand]: 670/673 looper letters, 66 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2023-09-01 07:07:07,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 101 transitions, 591 flow [2023-09-01 07:07:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:07:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:07:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7514 transitions. [2023-09-01 07:07:07,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652055473006439 [2023-09-01 07:07:07,360 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7514 transitions. [2023-09-01 07:07:07,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7514 transitions. [2023-09-01 07:07:07,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:07:07,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7514 transitions. [2023-09-01 07:07:07,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 313.0833333333333) internal successors, (7514), 24 states have internal predecessors, (7514), 0 states have call successors, (0), 0 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 07:07:07,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 673.0) internal successors, (16825), 25 states have internal predecessors, (16825), 0 states have call successors, (0), 0 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 07:07:07,417 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 673.0) internal successors, (16825), 25 states have internal predecessors, (16825), 0 states have call successors, (0), 0 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 07:07:07,418 INFO L175 Difference]: Start difference. First operand has 104 places, 89 transitions, 339 flow. Second operand 24 states and 7514 transitions. [2023-09-01 07:07:07,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 101 transitions, 591 flow [2023-09-01 07:07:07,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 101 transitions, 583 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 07:07:07,423 INFO L231 Difference]: Finished difference. Result has 138 places, 101 transitions, 573 flow [2023-09-01 07:07:07,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=573, PETRI_PLACES=138, PETRI_TRANSITIONS=101} [2023-09-01 07:07:07,426 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 52 predicate places. [2023-09-01 07:07:07,426 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 101 transitions, 573 flow [2023-09-01 07:07:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 310.3333333333333) internal successors, (7448), 24 states have internal predecessors, (7448), 0 states have call successors, (0), 0 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 07:07:07,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:07:07,430 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-09-01 07:07:07,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 07:07:07,653 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 07:07:07,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 07:07:07,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:07:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1358238174, now seen corresponding path program 5 times [2023-09-01 07:07:07,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:07:07,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821044097] [2023-09-01 07:07:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:07:07,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:07:08,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-09-01 07:07:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786317967] [2023-09-01 07:07:08,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 07:07:08,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:07:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:07:08,637 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 07:07:08,649 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