./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:49:04,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:49:04,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:49:04,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:49:04,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:49:04,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:49:04,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:49:04,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:49:04,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:49:04,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:49:04,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:49:04,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:49:04,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:49:04,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:49:04,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:49:04,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:49:04,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:49:04,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:49:04,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:49:04,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:49:04,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:49:04,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:49:04,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:49:04,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:49:04,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:49:04,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:49:04,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:49:04,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:49:04,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:49:04,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:49:04,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:49:04,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:49:04,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:49:04,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:49:04,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:49:04,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:49:04,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:49:04,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:49:04,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:49:04,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:49:04,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:49:04,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:49:04,528 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:49:04,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:49:04,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:49:04,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:49:04,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:49:04,531 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:49:04,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:49:04,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:49:04,532 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:49:04,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:49:04,533 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:49:04,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:49:04,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:49:04,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:49:04,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:49:04,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:49:04,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:49:04,534 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:49:04,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:49:04,535 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:49:04,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:49:04,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:49:04,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:49:04,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:49:04,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:49:04,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:49:04,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:49:04,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:49:04,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:49:04,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:49:04,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:49:04,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:49:04,537 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:49:04,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:49:04,538 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:49:04,538 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:49:04,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:49:04,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:49:04,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:49:04,884 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:49:04,884 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:49:04,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 20:49:06,001 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:49:06,232 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:49:06,232 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-30 20:49:06,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b2326540/dabe47fe7d0f40059dbfb8238c1edb37/FLAGca8a5dfe6 [2023-08-30 20:49:06,265 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b2326540/dabe47fe7d0f40059dbfb8238c1edb37 [2023-08-30 20:49:06,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:49:06,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:49:06,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:49:06,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:49:06,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:49:06,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df95922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06, skipping insertion in model container [2023-08-30 20:49:06,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:49:06,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:49:06,478 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 20:49:06,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:49:06,501 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:49:06,536 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c[2553,2566] [2023-08-30 20:49:06,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:49:06,553 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:49:06,553 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:49:06,559 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:49:06,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06 WrapperNode [2023-08-30 20:49:06,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:49:06,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:49:06,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:49:06,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:49:06,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,612 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-08-30 20:49:06,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:49:06,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:49:06,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:49:06,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:49:06,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:49:06,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:49:06,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:49:06,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:49:06,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (1/1) ... [2023-08-30 20:49:06,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:49:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:06,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:49:06,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:49:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:49:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:49:06,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:49:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:49:06,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:49:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:49:06,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:49:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:49:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:49:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:49:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:49:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:49:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:49:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:49:06,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:49:06,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:49:06,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:49:06,739 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:49:06,828 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:49:06,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:49:07,159 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:49:07,285 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:49:07,286 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:49:07,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:49:07 BoogieIcfgContainer [2023-08-30 20:49:07,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:49:07,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:49:07,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:49:07,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:49:07,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:49:06" (1/3) ... [2023-08-30 20:49:07,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307f357a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:49:07, skipping insertion in model container [2023-08-30 20:49:07,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:49:06" (2/3) ... [2023-08-30 20:49:07,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307f357a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:49:07, skipping insertion in model container [2023-08-30 20:49:07,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:49:07" (3/3) ... [2023-08-30 20:49:07,296 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-08-30 20:49:07,304 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:49:07,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:49:07,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:49:07,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:49:07,441 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:49:07,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-08-30 20:49:07,580 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-08-30 20:49:07,584 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:49:07,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 88 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 20:49:07,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-08-30 20:49:07,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-08-30 20:49:07,601 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:49:07,614 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-08-30 20:49:07,618 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-08-30 20:49:07,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-08-30 20:49:07,669 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-08-30 20:49:07,670 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:49:07,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 20:49:07,675 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-30 20:49:11,896 INFO L134 LiptonReduction]: Checked pairs total: 1615 [2023-08-30 20:49:11,896 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-30 20:49:11,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:49:11,913 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;@43db5fa9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:49:11,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:49:11,920 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 20:49:11,920 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:49:11,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:11,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:11,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:11,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1107178468, now seen corresponding path program 1 times [2023-08-30 20:49:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:11,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892755862] [2023-08-30 20:49:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892755862] [2023-08-30 20:49:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892755862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:49:12,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:49:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:49:12,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967409617] [2023-08-30 20:49:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:49:12,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:49:12,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:49:12,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:49:12,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 273 [2023-08-30 20:49:12,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:12,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:12,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 273 [2023-08-30 20:49:12,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:12,956 INFO L130 PetriNetUnfolder]: 679/943 cut-off events. [2023-08-30 20:49:12,956 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 20:49:12,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970 conditions, 943 events. 679/943 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3493 event pairs, 265 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 765. Up to 370 conditions per place. [2023-08-30 20:49:12,964 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 55 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2023-08-30 20:49:12,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 304 flow [2023-08-30 20:49:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:49:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:49:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 870 transitions. [2023-08-30 20:49:12,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552590266875981 [2023-08-30 20:49:12,985 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 870 transitions. [2023-08-30 20:49:12,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 870 transitions. [2023-08-30 20:49:12,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:12,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 870 transitions. [2023-08-30 20:49:12,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,004 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,006 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 7 states and 870 transitions. [2023-08-30 20:49:13,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 304 flow [2023-08-30 20:49:13,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 65 transitions, 272 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:49:13,013 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 97 flow [2023-08-30 20:49:13,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-30 20:49:13,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-30 20:49:13,020 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 97 flow [2023-08-30 20:49:13,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:13,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:13,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:49:13,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:13,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1966737023, now seen corresponding path program 1 times [2023-08-30 20:49:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:13,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491043188] [2023-08-30 20:49:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:13,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:13,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491043188] [2023-08-30 20:49:13,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491043188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:49:13,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:49:13,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:49:13,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110645975] [2023-08-30 20:49:13,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:49:13,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:49:13,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:49:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:49:13,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 273 [2023-08-30 20:49:13,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:13,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 273 [2023-08-30 20:49:13,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:13,332 INFO L130 PetriNetUnfolder]: 342/475 cut-off events. [2023-08-30 20:49:13,332 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-30 20:49:13,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 475 events. 342/475 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1468 event pairs, 133 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 1137. Up to 371 conditions per place. [2023-08-30 20:49:13,336 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 30 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-30 20:49:13,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 168 flow [2023-08-30 20:49:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:49:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:49:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-08-30 20:49:13,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146520146520147 [2023-08-30 20:49:13,339 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-08-30 20:49:13,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-08-30 20:49:13,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:13,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-08-30 20:49:13,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,343 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,343 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 97 flow. Second operand 4 states and 493 transitions. [2023-08-30 20:49:13,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 168 flow [2023-08-30 20:49:13,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 157 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 20:49:13,346 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 77 flow [2023-08-30 20:49:13,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-30 20:49:13,347 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-30 20:49:13,348 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 77 flow [2023-08-30 20:49:13,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:13,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:13,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:49:13,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:13,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash -805618038, now seen corresponding path program 1 times [2023-08-30 20:49:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151950143] [2023-08-30 20:49:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:13,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:13,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151950143] [2023-08-30 20:49:13,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151950143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163917860] [2023-08-30 20:49:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:13,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:13,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:13,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:49:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:49:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:13,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:13,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163917860] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:13,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:49:13,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 20:49:13,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727773120] [2023-08-30 20:49:13,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:49:13,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:49:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:49:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 20:49:13,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 273 [2023-08-30 20:49:13,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:13,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 273 [2023-08-30 20:49:13,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:13,839 INFO L130 PetriNetUnfolder]: 311/453 cut-off events. [2023-08-30 20:49:13,840 INFO L131 PetriNetUnfolder]: For 117/143 co-relation queries the response was YES. [2023-08-30 20:49:13,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 453 events. 311/453 cut-off events. For 117/143 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1443 event pairs, 73 based on Foata normal form. 26/371 useless extension candidates. Maximal degree in co-relation 1011. Up to 349 conditions per place. [2023-08-30 20:49:13,844 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 31 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-30 20:49:13,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 177 flow [2023-08-30 20:49:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:49:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:49:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2023-08-30 20:49:13,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424908424908425 [2023-08-30 20:49:13,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2023-08-30 20:49:13,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2023-08-30 20:49:13,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:13,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2023-08-30 20:49:13,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,852 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,852 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 77 flow. Second operand 5 states and 604 transitions. [2023-08-30 20:49:13,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 177 flow [2023-08-30 20:49:13,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:49:13,855 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 88 flow [2023-08-30 20:49:13,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-30 20:49:13,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-30 20:49:13,857 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 88 flow [2023-08-30 20:49:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:13,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:13,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:13,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:14,063 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 [2023-08-30 20:49:14,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:14,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1619003621, now seen corresponding path program 1 times [2023-08-30 20:49:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642086726] [2023-08-30 20:49:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:14,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:14,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642086726] [2023-08-30 20:49:14,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642086726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:14,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354326421] [2023-08-30 20:49:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:14,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:14,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:14,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:49:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:49:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:15,484 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-30 20:49:15,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-08-30 20:49:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:15,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:15,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:15,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-30 20:49:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354326421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:15,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:15,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-30 20:49:15,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840368540] [2023-08-30 20:49:15,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:15,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:49:15,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:49:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:49:16,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 273 [2023-08-30 20:49:16,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 88 flow. Second operand has 23 states, 23 states have (on average 101.6086956521739) internal successors, (2337), 23 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:16,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:16,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 273 [2023-08-30 20:49:16,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:17,779 INFO L130 PetriNetUnfolder]: 679/981 cut-off events. [2023-08-30 20:49:17,780 INFO L131 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2023-08-30 20:49:17,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 981 events. 679/981 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3670 event pairs, 84 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 2286. Up to 677 conditions per place. [2023-08-30 20:49:17,786 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 73 selfloop transitions, 35 changer transitions 4/113 dead transitions. [2023-08-30 20:49:17,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 113 transitions, 564 flow [2023-08-30 20:49:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:49:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:49:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1396 transitions. [2023-08-30 20:49:17,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39335023950408565 [2023-08-30 20:49:17,790 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1396 transitions. [2023-08-30 20:49:17,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1396 transitions. [2023-08-30 20:49:17,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:17,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1396 transitions. [2023-08-30 20:49:17,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.38461538461539) internal successors, (1396), 13 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:17,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:17,799 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:17,799 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 88 flow. Second operand 13 states and 1396 transitions. [2023-08-30 20:49:17,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 113 transitions, 564 flow [2023-08-30 20:49:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 113 transitions, 536 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 20:49:17,802 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 304 flow [2023-08-30 20:49:17,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=304, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-08-30 20:49:17,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2023-08-30 20:49:17,804 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 304 flow [2023-08-30 20:49:17,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 101.6086956521739) internal successors, (2337), 23 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:17,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:17,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:17,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:18,010 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 [2023-08-30 20:49:18,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:18,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1587343155, now seen corresponding path program 2 times [2023-08-30 20:49:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334334902] [2023-08-30 20:49:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:18,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:18,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334334902] [2023-08-30 20:49:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334334902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379632816] [2023-08-30 20:49:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:49:18,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:18,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:18,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:49:18,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:49:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:49:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:49:19,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:19,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-30 20:49:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:19,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:19,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-30 20:49:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:19,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379632816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:19,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:19,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-30 20:49:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329056249] [2023-08-30 20:49:19,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:19,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:49:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:49:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:49:20,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 273 [2023-08-30 20:49:20,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 304 flow. Second operand has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:20,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:20,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 273 [2023-08-30 20:49:20,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:21,154 INFO L130 PetriNetUnfolder]: 1001/1468 cut-off events. [2023-08-30 20:49:21,154 INFO L131 PetriNetUnfolder]: For 1349/1349 co-relation queries the response was YES. [2023-08-30 20:49:21,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 1468 events. 1001/1468 cut-off events. For 1349/1349 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5408 event pairs, 136 based on Foata normal form. 2/1464 useless extension candidates. Maximal degree in co-relation 4542. Up to 1033 conditions per place. [2023-08-30 20:49:21,163 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 105 selfloop transitions, 54 changer transitions 7/166 dead transitions. [2023-08-30 20:49:21,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 166 transitions, 1007 flow [2023-08-30 20:49:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:49:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:49:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1867 transitions. [2023-08-30 20:49:21,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37993487993487995 [2023-08-30 20:49:21,169 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1867 transitions. [2023-08-30 20:49:21,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1867 transitions. [2023-08-30 20:49:21,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:21,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1867 transitions. [2023-08-30 20:49:21,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 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) [2023-08-30 20:49:21,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:21,181 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:21,181 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 304 flow. Second operand 18 states and 1867 transitions. [2023-08-30 20:49:21,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 166 transitions, 1007 flow [2023-08-30 20:49:21,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 166 transitions, 993 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 20:49:21,188 INFO L231 Difference]: Finished difference. Result has 74 places, 97 transitions, 664 flow [2023-08-30 20:49:21,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=664, PETRI_PLACES=74, PETRI_TRANSITIONS=97} [2023-08-30 20:49:21,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-08-30 20:49:21,190 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 97 transitions, 664 flow [2023-08-30 20:49:21,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:21,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:21,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:21,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:21,397 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 [2023-08-30 20:49:21,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:21,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1702762413, now seen corresponding path program 3 times [2023-08-30 20:49:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:21,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720509637] [2023-08-30 20:49:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:22,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:22,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720509637] [2023-08-30 20:49:22,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720509637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:22,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127889023] [2023-08-30 20:49:22,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:49:22,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:22,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:22,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:49:22,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:49:22,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 20:49:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:22,538 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:49:22,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:22,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-30 20:49:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:22,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:22,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:22,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-30 20:49:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127889023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:22,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:22,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-08-30 20:49:22,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419141168] [2023-08-30 20:49:22,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:49:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:49:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-30 20:49:24,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 273 [2023-08-30 20:49:24,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 664 flow. Second operand has 26 states, 26 states have (on average 92.42307692307692) internal successors, (2403), 26 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:24,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:24,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 273 [2023-08-30 20:49:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:25,355 INFO L130 PetriNetUnfolder]: 1399/2097 cut-off events. [2023-08-30 20:49:25,356 INFO L131 PetriNetUnfolder]: For 3789/3789 co-relation queries the response was YES. [2023-08-30 20:49:25,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 2097 events. 1399/2097 cut-off events. For 3789/3789 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8873 event pairs, 132 based on Foata normal form. 3/2100 useless extension candidates. Maximal degree in co-relation 8253. Up to 1224 conditions per place. [2023-08-30 20:49:25,371 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 161 selfloop transitions, 107 changer transitions 5/273 dead transitions. [2023-08-30 20:49:25,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 273 transitions, 2012 flow [2023-08-30 20:49:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:49:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:49:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2180 transitions. [2023-08-30 20:49:25,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36297036297036295 [2023-08-30 20:49:25,378 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2180 transitions. [2023-08-30 20:49:25,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2180 transitions. [2023-08-30 20:49:25,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:25,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2180 transitions. [2023-08-30 20:49:25,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 99.0909090909091) internal successors, (2180), 22 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:25,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:25,393 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:25,393 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 664 flow. Second operand 22 states and 2180 transitions. [2023-08-30 20:49:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 273 transitions, 2012 flow [2023-08-30 20:49:25,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 273 transitions, 1953 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-08-30 20:49:25,413 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1411 flow [2023-08-30 20:49:25,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1411, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2023-08-30 20:49:25,416 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2023-08-30 20:49:25,416 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1411 flow [2023-08-30 20:49:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 92.42307692307692) internal successors, (2403), 26 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:25,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:25,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:25,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:25,627 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 [2023-08-30 20:49:25,628 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:25,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1571153735, now seen corresponding path program 4 times [2023-08-30 20:49:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:25,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283142297] [2023-08-30 20:49:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:26,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283142297] [2023-08-30 20:49:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283142297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378151226] [2023-08-30 20:49:26,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:49:26,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:26,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:26,289 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) [2023-08-30 20:49:26,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:49:26,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:49:26,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 20:49:26,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:49:26,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-30 20:49:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:49:26,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:26,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-30 20:49:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:26,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:26,953 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_261 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0)))) (forall ((v_ArrVal_261 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) .cse0))) (or (= c_~max1~0 .cse1) (<= .cse1 c_~max2~0)))))) is different from false [2023-08-30 20:49:26,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:26,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 99 [2023-08-30 20:49:27,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2023-08-30 20:49:27,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-08-30 20:49:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 20:49:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378151226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:27,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 20:49:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124272558] [2023-08-30 20:49:27,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:27,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:49:27,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:49:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=592, Unknown=1, NotChecked=50, Total=756 [2023-08-30 20:49:27,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-08-30 20:49:27,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1411 flow. Second operand has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:27,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:27,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-08-30 20:49:27,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:28,832 INFO L130 PetriNetUnfolder]: 1794/2701 cut-off events. [2023-08-30 20:49:28,832 INFO L131 PetriNetUnfolder]: For 9600/9600 co-relation queries the response was YES. [2023-08-30 20:49:28,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13200 conditions, 2701 events. 1794/2701 cut-off events. For 9600/9600 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12296 event pairs, 168 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 13154. Up to 1507 conditions per place. [2023-08-30 20:49:28,859 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 175 selfloop transitions, 150 changer transitions 4/329 dead transitions. [2023-08-30 20:49:28,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 329 transitions, 3191 flow [2023-08-30 20:49:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:49:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:49:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1763 transitions. [2023-08-30 20:49:28,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3075178789464504 [2023-08-30 20:49:28,865 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1763 transitions. [2023-08-30 20:49:28,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1763 transitions. [2023-08-30 20:49:28,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:28,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1763 transitions. [2023-08-30 20:49:28,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.95238095238095) internal successors, (1763), 21 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:28,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:28,878 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 273.0) internal successors, (6006), 22 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:28,878 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1411 flow. Second operand 21 states and 1763 transitions. [2023-08-30 20:49:28,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 329 transitions, 3191 flow [2023-08-30 20:49:28,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 329 transitions, 3065 flow, removed 55 selfloop flow, removed 4 redundant places. [2023-08-30 20:49:28,917 INFO L231 Difference]: Finished difference. Result has 127 places, 222 transitions, 2379 flow [2023-08-30 20:49:28,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2379, PETRI_PLACES=127, PETRI_TRANSITIONS=222} [2023-08-30 20:49:28,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-08-30 20:49:28,918 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 222 transitions, 2379 flow [2023-08-30 20:49:28,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.25) internal successors, (2163), 28 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:28,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:28,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:28,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:29,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:29,126 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:29,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash 353698307, now seen corresponding path program 5 times [2023-08-30 20:49:29,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236845852] [2023-08-30 20:49:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236845852] [2023-08-30 20:49:29,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236845852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961095145] [2023-08-30 20:49:29,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:49:29,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:29,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:29,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:29,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:49:29,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:49:29,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:49:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:30,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:30,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-08-30 20:49:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:30,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:30,646 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:49:30,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2023-08-30 20:49:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961095145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:30,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:30,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-08-30 20:49:30,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128222255] [2023-08-30 20:49:30,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:30,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:49:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:30,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:49:30,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:49:31,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-08-30 20:49:31,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 222 transitions, 2379 flow. Second operand has 22 states, 22 states have (on average 102.68181818181819) internal successors, (2259), 22 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:31,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:31,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-08-30 20:49:31,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:33,472 INFO L130 PetriNetUnfolder]: 2493/3915 cut-off events. [2023-08-30 20:49:33,473 INFO L131 PetriNetUnfolder]: For 20392/20444 co-relation queries the response was YES. [2023-08-30 20:49:33,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20768 conditions, 3915 events. 2493/3915 cut-off events. For 20392/20444 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21794 event pairs, 185 based on Foata normal form. 38/3940 useless extension candidates. Maximal degree in co-relation 20714. Up to 2338 conditions per place. [2023-08-30 20:49:33,549 INFO L137 encePairwiseOnDemand]: 259/273 looper letters, 217 selfloop transitions, 197 changer transitions 9/429 dead transitions. [2023-08-30 20:49:33,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 429 transitions, 4902 flow [2023-08-30 20:49:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 20:49:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 20:49:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2580 transitions. [2023-08-30 20:49:33,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39377289377289376 [2023-08-30 20:49:33,557 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2580 transitions. [2023-08-30 20:49:33,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2580 transitions. [2023-08-30 20:49:33,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:33,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2580 transitions. [2023-08-30 20:49:33,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 107.5) internal successors, (2580), 24 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:33,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:33,573 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 273.0) internal successors, (6825), 25 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:33,573 INFO L175 Difference]: Start difference. First operand has 127 places, 222 transitions, 2379 flow. Second operand 24 states and 2580 transitions. [2023-08-30 20:49:33,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 429 transitions, 4902 flow [2023-08-30 20:49:33,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 429 transitions, 4594 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-08-30 20:49:33,634 INFO L231 Difference]: Finished difference. Result has 154 places, 337 transitions, 3925 flow [2023-08-30 20:49:33,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3925, PETRI_PLACES=154, PETRI_TRANSITIONS=337} [2023-08-30 20:49:33,635 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-08-30 20:49:33,636 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 337 transitions, 3925 flow [2023-08-30 20:49:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 102.68181818181819) internal successors, (2259), 22 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:33,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:33,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:33,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 20:49:33,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:33,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:33,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash -536441915, now seen corresponding path program 6 times [2023-08-30 20:49:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211384513] [2023-08-30 20:49:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211384513] [2023-08-30 20:49:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211384513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614345470] [2023-08-30 20:49:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:49:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:34,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:34,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:49:34,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:49:34,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:34,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 20:49:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:34,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-08-30 20:49:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:34,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:34,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:34,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2023-08-30 20:49:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:34,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614345470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:34,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:34,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-30 20:49:34,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580847769] [2023-08-30 20:49:34,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:34,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:49:34,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:49:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:49:35,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 273 [2023-08-30 20:49:35,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 337 transitions, 3925 flow. Second operand has 22 states, 22 states have (on average 100.77272727272727) internal successors, (2217), 22 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:35,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:35,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 273 [2023-08-30 20:49:35,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:36,661 INFO L130 PetriNetUnfolder]: 2826/4401 cut-off events. [2023-08-30 20:49:36,661 INFO L131 PetriNetUnfolder]: For 29259/29259 co-relation queries the response was YES. [2023-08-30 20:49:36,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 4401 events. 2826/4401 cut-off events. For 29259/29259 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23294 event pairs, 721 based on Foata normal form. 2/4403 useless extension candidates. Maximal degree in co-relation 25180. Up to 3860 conditions per place. [2023-08-30 20:49:36,704 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 278 selfloop transitions, 135 changer transitions 2/415 dead transitions. [2023-08-30 20:49:36,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 415 transitions, 5444 flow [2023-08-30 20:49:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:49:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:49:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1886 transitions. [2023-08-30 20:49:36,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838013838013838 [2023-08-30 20:49:36,707 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1886 transitions. [2023-08-30 20:49:36,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1886 transitions. [2023-08-30 20:49:36,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:36,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1886 transitions. [2023-08-30 20:49:36,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 104.77777777777777) internal successors, (1886), 18 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:36,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:36,720 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:36,720 INFO L175 Difference]: Start difference. First operand has 154 places, 337 transitions, 3925 flow. Second operand 18 states and 1886 transitions. [2023-08-30 20:49:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 415 transitions, 5444 flow [2023-08-30 20:49:36,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 415 transitions, 4874 flow, removed 222 selfloop flow, removed 7 redundant places. [2023-08-30 20:49:36,844 INFO L231 Difference]: Finished difference. Result has 168 places, 363 transitions, 4059 flow [2023-08-30 20:49:36,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4059, PETRI_PLACES=168, PETRI_TRANSITIONS=363} [2023-08-30 20:49:36,846 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2023-08-30 20:49:36,846 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 363 transitions, 4059 flow [2023-08-30 20:49:36,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.77272727272727) internal successors, (2217), 22 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:36,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:36,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:36,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:37,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:37,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash 820266829, now seen corresponding path program 7 times [2023-08-30 20:49:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225797047] [2023-08-30 20:49:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:37,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225797047] [2023-08-30 20:49:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225797047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60256775] [2023-08-30 20:49:37,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:49:37,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:37,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:37,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:37,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:49:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:49:37,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:38,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-08-30 20:49:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:38,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:38,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:38,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 45 [2023-08-30 20:49:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:38,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60256775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:38,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:38,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-08-30 20:49:38,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735308858] [2023-08-30 20:49:38,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:49:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:49:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:49:39,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 273 [2023-08-30 20:49:39,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 363 transitions, 4059 flow. Second operand has 24 states, 24 states have (on average 94.45833333333333) internal successors, (2267), 24 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:39,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:39,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 273 [2023-08-30 20:49:39,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:40,607 INFO L130 PetriNetUnfolder]: 2667/4232 cut-off events. [2023-08-30 20:49:40,607 INFO L131 PetriNetUnfolder]: For 22344/22381 co-relation queries the response was YES. [2023-08-30 20:49:40,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22983 conditions, 4232 events. 2667/4232 cut-off events. For 22344/22381 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23723 event pairs, 570 based on Foata normal form. 24/4240 useless extension candidates. Maximal degree in co-relation 22917. Up to 3867 conditions per place. [2023-08-30 20:49:40,646 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 289 selfloop transitions, 110 changer transitions 1/410 dead transitions. [2023-08-30 20:49:40,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 410 transitions, 5166 flow [2023-08-30 20:49:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:49:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:49:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1095 transitions. [2023-08-30 20:49:40,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3646353646353646 [2023-08-30 20:49:40,649 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1095 transitions. [2023-08-30 20:49:40,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1095 transitions. [2023-08-30 20:49:40,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:40,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1095 transitions. [2023-08-30 20:49:40,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 99.54545454545455) internal successors, (1095), 11 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:40,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:40,656 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:40,657 INFO L175 Difference]: Start difference. First operand has 168 places, 363 transitions, 4059 flow. Second operand 11 states and 1095 transitions. [2023-08-30 20:49:40,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 410 transitions, 5166 flow [2023-08-30 20:49:40,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 410 transitions, 5000 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 20:49:40,742 INFO L231 Difference]: Finished difference. Result has 173 places, 375 transitions, 4307 flow [2023-08-30 20:49:40,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4307, PETRI_PLACES=173, PETRI_TRANSITIONS=375} [2023-08-30 20:49:40,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2023-08-30 20:49:40,743 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 375 transitions, 4307 flow [2023-08-30 20:49:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.45833333333333) internal successors, (2267), 24 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:40,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:40,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 20:49:40,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 20:49:40,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:40,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash 663032483, now seen corresponding path program 8 times [2023-08-30 20:49:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:40,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582248769] [2023-08-30 20:49:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582248769] [2023-08-30 20:49:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582248769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534267413] [2023-08-30 20:49:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:49:41,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:41,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:41,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:49:41,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:49:41,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 20:49:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:49:41,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-30 20:49:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:49:42,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-30 20:49:42,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:49:42,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:42,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2023-08-30 20:49:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:42,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:42,485 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1))) (or (= c_~max1~0 .cse0) (<= .cse0 c_~max2~0)))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_438 (Array Int Int)) (v_ArrVal_439 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_439) c_~A~0.base) .cse1)))))) is different from false [2023-08-30 20:49:42,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:49:42,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 353 [2023-08-30 20:49:42,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 171 [2023-08-30 20:49:42,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 165 [2023-08-30 20:49:42,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 153 [2023-08-30 20:49:42,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 129 [2023-08-30 20:49:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:42,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534267413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:42,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:42,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 20:49:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426368347] [2023-08-30 20:49:42,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:42,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:49:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:49:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=598, Unknown=2, NotChecked=50, Total=756 [2023-08-30 20:49:42,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 273 [2023-08-30 20:49:42,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 375 transitions, 4307 flow. Second operand has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:42,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:42,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 273 [2023-08-30 20:49:42,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:48,577 INFO L130 PetriNetUnfolder]: 2910/4621 cut-off events. [2023-08-30 20:49:48,577 INFO L131 PetriNetUnfolder]: For 26057/26173 co-relation queries the response was YES. [2023-08-30 20:49:48,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25525 conditions, 4621 events. 2910/4621 cut-off events. For 26057/26173 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26544 event pairs, 407 based on Foata normal form. 42/4649 useless extension candidates. Maximal degree in co-relation 25456. Up to 3074 conditions per place. [2023-08-30 20:49:48,619 INFO L137 encePairwiseOnDemand]: 262/273 looper letters, 248 selfloop transitions, 201 changer transitions 4/463 dead transitions. [2023-08-30 20:49:48,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 463 transitions, 5800 flow [2023-08-30 20:49:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:49:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:49:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1102 transitions. [2023-08-30 20:49:48,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31051000281769514 [2023-08-30 20:49:48,622 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1102 transitions. [2023-08-30 20:49:48,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1102 transitions. [2023-08-30 20:49:48,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:48,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1102 transitions. [2023-08-30 20:49:48,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.76923076923077) internal successors, (1102), 13 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:48,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:48,629 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 273.0) internal successors, (3822), 14 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:48,629 INFO L175 Difference]: Start difference. First operand has 173 places, 375 transitions, 4307 flow. Second operand 13 states and 1102 transitions. [2023-08-30 20:49:48,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 463 transitions, 5800 flow [2023-08-30 20:49:48,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 463 transitions, 5649 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 20:49:48,742 INFO L231 Difference]: Finished difference. Result has 183 places, 398 transitions, 5003 flow [2023-08-30 20:49:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5003, PETRI_PLACES=183, PETRI_TRANSITIONS=398} [2023-08-30 20:49:48,744 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2023-08-30 20:49:48,744 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 398 transitions, 5003 flow [2023-08-30 20:49:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.14285714285714) internal successors, (2160), 28 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:48,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:48,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:48,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:48,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:48,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:48,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1650774356, now seen corresponding path program 9 times [2023-08-30 20:49:48,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:48,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677109504] [2023-08-30 20:49:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:48,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:49,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677109504] [2023-08-30 20:49:49,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677109504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:49,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126989414] [2023-08-30 20:49:49,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:49:49,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:49,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:49,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:49:49,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:49:49,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:49:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:49,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126989414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:49,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:49,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 20:49:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505212624] [2023-08-30 20:49:49,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:49:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:49:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:49:49,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 273 [2023-08-30 20:49:49,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 398 transitions, 5003 flow. Second operand has 14 states, 14 states have (on average 116.35714285714286) internal successors, (1629), 14 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:49,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:49,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 273 [2023-08-30 20:49:49,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:50,195 INFO L130 PetriNetUnfolder]: 2867/4707 cut-off events. [2023-08-30 20:49:50,196 INFO L131 PetriNetUnfolder]: For 39136/39461 co-relation queries the response was YES. [2023-08-30 20:49:50,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27443 conditions, 4707 events. 2867/4707 cut-off events. For 39136/39461 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28953 event pairs, 726 based on Foata normal form. 420/5018 useless extension candidates. Maximal degree in co-relation 27370. Up to 2543 conditions per place. [2023-08-30 20:49:50,228 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 355 selfloop transitions, 39 changer transitions 1/427 dead transitions. [2023-08-30 20:49:50,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 427 transitions, 5969 flow [2023-08-30 20:49:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:49:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:49:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2023-08-30 20:49:50,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2023-08-30 20:49:50,230 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2023-08-30 20:49:50,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2023-08-30 20:49:50,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:50,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2023-08-30 20:49:50,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:50,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:50,235 INFO L175 Difference]: Start difference. First operand has 183 places, 398 transitions, 5003 flow. Second operand 8 states and 984 transitions. [2023-08-30 20:49:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 427 transitions, 5969 flow [2023-08-30 20:49:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 427 transitions, 5756 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-08-30 20:49:50,333 INFO L231 Difference]: Finished difference. Result has 186 places, 366 transitions, 4532 flow [2023-08-30 20:49:50,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4349, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4532, PETRI_PLACES=186, PETRI_TRANSITIONS=366} [2023-08-30 20:49:50,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2023-08-30 20:49:50,334 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 366 transitions, 4532 flow [2023-08-30 20:49:50,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 116.35714285714286) internal successors, (1629), 14 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:50,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:50,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:50,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:49:50,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:50,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:50,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1159546519, now seen corresponding path program 1 times [2023-08-30 20:49:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391863452] [2023-08-30 20:49:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:50,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391863452] [2023-08-30 20:49:50,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391863452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:50,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114839580] [2023-08-30 20:49:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:50,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:50,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:50,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:49:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:50,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:49:50,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:50,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114839580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:50,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:50,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:49:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507886176] [2023-08-30 20:49:50,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:50,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:49:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:50,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:49:50,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:49:51,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:49:51,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 366 transitions, 4532 flow. Second operand has 16 states, 16 states have (on average 110.3125) internal successors, (1765), 16 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:51,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:51,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:49:51,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:52,064 INFO L130 PetriNetUnfolder]: 2773/4666 cut-off events. [2023-08-30 20:49:52,064 INFO L131 PetriNetUnfolder]: For 38674/38698 co-relation queries the response was YES. [2023-08-30 20:49:52,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26816 conditions, 4666 events. 2773/4666 cut-off events. For 38674/38698 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28678 event pairs, 315 based on Foata normal form. 339/4994 useless extension candidates. Maximal degree in co-relation 26739. Up to 2009 conditions per place. [2023-08-30 20:49:52,098 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 391 selfloop transitions, 44 changer transitions 20/470 dead transitions. [2023-08-30 20:49:52,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 470 transitions, 6221 flow [2023-08-30 20:49:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:49:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:49:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1284 transitions. [2023-08-30 20:49:52,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275724275724276 [2023-08-30 20:49:52,100 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1284 transitions. [2023-08-30 20:49:52,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1284 transitions. [2023-08-30 20:49:52,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:52,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1284 transitions. [2023-08-30 20:49:52,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 116.72727272727273) internal successors, (1284), 11 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:52,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:52,106 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 273.0) internal successors, (3276), 12 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:52,106 INFO L175 Difference]: Start difference. First operand has 186 places, 366 transitions, 4532 flow. Second operand 11 states and 1284 transitions. [2023-08-30 20:49:52,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 470 transitions, 6221 flow [2023-08-30 20:49:52,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 470 transitions, 6216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:49:52,215 INFO L231 Difference]: Finished difference. Result has 200 places, 298 transitions, 3944 flow [2023-08-30 20:49:52,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=200, PETRI_TRANSITIONS=298} [2023-08-30 20:49:52,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-08-30 20:49:52,216 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 298 transitions, 3944 flow [2023-08-30 20:49:52,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.3125) internal successors, (1765), 16 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:52,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:52,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:52,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:52,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:49:52,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:52,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash -826576938, now seen corresponding path program 10 times [2023-08-30 20:49:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751296063] [2023-08-30 20:49:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:52,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:52,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751296063] [2023-08-30 20:49:52,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751296063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:52,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607801035] [2023-08-30 20:49:52,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:49:52,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:52,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:52,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:52,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:49:52,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:49:52,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 20:49:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:52,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:52,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607801035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:52,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:52,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2023-08-30 20:49:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032779910] [2023-08-30 20:49:52,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:49:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:49:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:49:53,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 273 [2023-08-30 20:49:53,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 298 transitions, 3944 flow. Second operand has 17 states, 17 states have (on average 113.47058823529412) internal successors, (1929), 17 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:53,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:53,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 273 [2023-08-30 20:49:53,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:54,275 INFO L130 PetriNetUnfolder]: 2231/3931 cut-off events. [2023-08-30 20:49:54,275 INFO L131 PetriNetUnfolder]: For 47227/47254 co-relation queries the response was YES. [2023-08-30 20:49:54,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 3931 events. 2231/3931 cut-off events. For 47227/47254 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25646 event pairs, 249 based on Foata normal form. 317/4235 useless extension candidates. Maximal degree in co-relation 25267. Up to 964 conditions per place. [2023-08-30 20:49:54,312 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 190 selfloop transitions, 89 changer transitions 153/436 dead transitions. [2023-08-30 20:49:54,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 436 transitions, 5975 flow [2023-08-30 20:49:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 20:49:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 20:49:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2586 transitions. [2023-08-30 20:49:54,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305694305694306 [2023-08-30 20:49:54,316 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2586 transitions. [2023-08-30 20:49:54,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2586 transitions. [2023-08-30 20:49:54,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:54,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2586 transitions. [2023-08-30 20:49:54,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.54545454545455) internal successors, (2586), 22 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:54,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:54,328 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 273.0) internal successors, (6279), 23 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:54,328 INFO L175 Difference]: Start difference. First operand has 200 places, 298 transitions, 3944 flow. Second operand 22 states and 2586 transitions. [2023-08-30 20:49:54,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 436 transitions, 5975 flow [2023-08-30 20:49:54,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 436 transitions, 5627 flow, removed 79 selfloop flow, removed 14 redundant places. [2023-08-30 20:49:54,480 INFO L231 Difference]: Finished difference. Result has 207 places, 196 transitions, 2500 flow [2023-08-30 20:49:54,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2500, PETRI_PLACES=207, PETRI_TRANSITIONS=196} [2023-08-30 20:49:54,481 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-08-30 20:49:54,481 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 196 transitions, 2500 flow [2023-08-30 20:49:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 113.47058823529412) internal successors, (1929), 17 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:54,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:54,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:54,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:49:54,687 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:54,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash 858875532, now seen corresponding path program 11 times [2023-08-30 20:49:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178853788] [2023-08-30 20:49:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178853788] [2023-08-30 20:49:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178853788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:54,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084701056] [2023-08-30 20:49:54,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:49:54,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:54,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:54,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:54,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:49:54,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:49:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:54,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:49:54,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:54,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:49:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084701056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:55,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:55,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-30 20:49:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553350119] [2023-08-30 20:49:55,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:49:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:49:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:49:55,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 273 [2023-08-30 20:49:55,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 196 transitions, 2500 flow. Second operand has 15 states, 15 states have (on average 116.33333333333333) internal successors, (1745), 15 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:55,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:55,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 273 [2023-08-30 20:49:55,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:55,398 INFO L130 PetriNetUnfolder]: 839/1263 cut-off events. [2023-08-30 20:49:55,399 INFO L131 PetriNetUnfolder]: For 14706/14799 co-relation queries the response was YES. [2023-08-30 20:49:55,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 1263 events. 839/1263 cut-off events. For 14706/14799 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5310 event pairs, 130 based on Foata normal form. 135/1366 useless extension candidates. Maximal degree in co-relation 9217. Up to 678 conditions per place. [2023-08-30 20:49:55,410 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 111 selfloop transitions, 65 changer transitions 0/186 dead transitions. [2023-08-30 20:49:55,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2664 flow [2023-08-30 20:49:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:49:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:49:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 843 transitions. [2023-08-30 20:49:55,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411302982731554 [2023-08-30 20:49:55,411 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 843 transitions. [2023-08-30 20:49:55,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 843 transitions. [2023-08-30 20:49:55,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:55,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 843 transitions. [2023-08-30 20:49:55,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:55,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:55,415 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:55,415 INFO L175 Difference]: Start difference. First operand has 207 places, 196 transitions, 2500 flow. Second operand 7 states and 843 transitions. [2023-08-30 20:49:55,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2664 flow [2023-08-30 20:49:55,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 2089 flow, removed 168 selfloop flow, removed 34 redundant places. [2023-08-30 20:49:55,452 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 1699 flow [2023-08-30 20:49:55,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2023-08-30 20:49:55,452 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-08-30 20:49:55,452 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 1699 flow [2023-08-30 20:49:55,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 116.33333333333333) internal successors, (1745), 15 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:55,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:55,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:55,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:55,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:49:55,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:55,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1834037619, now seen corresponding path program 12 times [2023-08-30 20:49:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:55,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679827826] [2023-08-30 20:49:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:55,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:55,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:55,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679827826] [2023-08-30 20:49:55,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679827826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:55,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793659481] [2023-08-30 20:49:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:49:55,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:55,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:55,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:49:55,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:49:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:49:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:56,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793659481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:56,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:56,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-30 20:49:56,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293782290] [2023-08-30 20:49:56,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:56,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:49:56,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:49:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:49:56,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:49:56,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 1699 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:56,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:56,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:49:56,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:57,165 INFO L130 PetriNetUnfolder]: 1410/2155 cut-off events. [2023-08-30 20:49:57,165 INFO L131 PetriNetUnfolder]: For 11222/11234 co-relation queries the response was YES. [2023-08-30 20:49:57,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2155 events. 1410/2155 cut-off events. For 11222/11234 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9665 event pairs, 245 based on Foata normal form. 29/2170 useless extension candidates. Maximal degree in co-relation 11795. Up to 1108 conditions per place. [2023-08-30 20:49:57,178 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 242 selfloop transitions, 108 changer transitions 0/360 dead transitions. [2023-08-30 20:49:57,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 360 transitions, 4084 flow [2023-08-30 20:49:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:49:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:49:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1741 transitions. [2023-08-30 20:49:57,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42515262515262514 [2023-08-30 20:49:57,181 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1741 transitions. [2023-08-30 20:49:57,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1741 transitions. [2023-08-30 20:49:57,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:57,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1741 transitions. [2023-08-30 20:49:57,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.06666666666666) internal successors, (1741), 15 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:57,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:57,188 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:57,188 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 1699 flow. Second operand 15 states and 1741 transitions. [2023-08-30 20:49:57,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 360 transitions, 4084 flow [2023-08-30 20:49:57,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 360 transitions, 3854 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 20:49:57,224 INFO L231 Difference]: Finished difference. Result has 129 places, 234 transitions, 2626 flow [2023-08-30 20:49:57,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2626, PETRI_PLACES=129, PETRI_TRANSITIONS=234} [2023-08-30 20:49:57,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2023-08-30 20:49:57,225 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 234 transitions, 2626 flow [2023-08-30 20:49:57,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:57,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:57,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:57,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:57,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:57,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:57,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1735626719, now seen corresponding path program 13 times [2023-08-30 20:49:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:57,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255933279] [2023-08-30 20:49:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:57,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:57,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255933279] [2023-08-30 20:49:57,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255933279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:57,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487356892] [2023-08-30 20:49:57,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:49:57,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:57,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:57,540 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:57,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:49:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:57,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:49:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:57,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:57,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487356892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:57,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:57,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-30 20:49:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965423313] [2023-08-30 20:49:57,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:49:57,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:57,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:49:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:49:58,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:49:58,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 234 transitions, 2626 flow. Second operand has 18 states, 18 states have (on average 110.11111111111111) internal successors, (1982), 18 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:58,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:58,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:49:58,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:49:58,535 INFO L130 PetriNetUnfolder]: 1735/2659 cut-off events. [2023-08-30 20:49:58,536 INFO L131 PetriNetUnfolder]: For 19320/19324 co-relation queries the response was YES. [2023-08-30 20:49:58,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 2659 events. 1735/2659 cut-off events. For 19320/19324 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12503 event pairs, 318 based on Foata normal form. 32/2688 useless extension candidates. Maximal degree in co-relation 16198. Up to 1226 conditions per place. [2023-08-30 20:49:58,558 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 253 selfloop transitions, 79 changer transitions 0/341 dead transitions. [2023-08-30 20:49:58,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 341 transitions, 4241 flow [2023-08-30 20:49:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:49:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:49:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1040 transitions. [2023-08-30 20:49:58,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2023-08-30 20:49:58,559 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1040 transitions. [2023-08-30 20:49:58,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1040 transitions. [2023-08-30 20:49:58,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:49:58,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1040 transitions. [2023-08-30 20:49:58,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:58,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:58,562 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:58,562 INFO L175 Difference]: Start difference. First operand has 129 places, 234 transitions, 2626 flow. Second operand 9 states and 1040 transitions. [2023-08-30 20:49:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 341 transitions, 4241 flow [2023-08-30 20:49:58,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 341 transitions, 4026 flow, removed 74 selfloop flow, removed 4 redundant places. [2023-08-30 20:49:58,613 INFO L231 Difference]: Finished difference. Result has 137 places, 242 transitions, 2872 flow [2023-08-30 20:49:58,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2872, PETRI_PLACES=137, PETRI_TRANSITIONS=242} [2023-08-30 20:49:58,613 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-08-30 20:49:58,614 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 242 transitions, 2872 flow [2023-08-30 20:49:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.11111111111111) internal successors, (1982), 18 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:58,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:49:58,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:49:58,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:49:58,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 20:49:58,821 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:49:58,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:49:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash -408139775, now seen corresponding path program 14 times [2023-08-30 20:49:58,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:49:58,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935124667] [2023-08-30 20:49:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:49:58,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:49:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:49:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:49:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935124667] [2023-08-30 20:49:58,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935124667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:49:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344123519] [2023-08-30 20:49:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:49:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:49:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:49:58,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:49:58,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:49:59,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:49:59,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:49:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:49:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:49:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:59,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:49:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:49:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344123519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:49:59,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:49:59,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-30 20:49:59,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318696711] [2023-08-30 20:49:59,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:49:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:49:59,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:49:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:49:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:49:59,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:49:59,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 242 transitions, 2872 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:49:59,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:49:59,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:49:59,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:00,693 INFO L130 PetriNetUnfolder]: 2498/3791 cut-off events. [2023-08-30 20:50:00,693 INFO L131 PetriNetUnfolder]: For 32432/32444 co-relation queries the response was YES. [2023-08-30 20:50:00,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24540 conditions, 3791 events. 2498/3791 cut-off events. For 32432/32444 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18722 event pairs, 326 based on Foata normal form. 32/3814 useless extension candidates. Maximal degree in co-relation 24490. Up to 1487 conditions per place. [2023-08-30 20:50:00,720 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 282 selfloop transitions, 179 changer transitions 0/470 dead transitions. [2023-08-30 20:50:00,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 470 transitions, 5879 flow [2023-08-30 20:50:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:50:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:50:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2100 transitions. [2023-08-30 20:50:00,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2023-08-30 20:50:00,722 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2100 transitions. [2023-08-30 20:50:00,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2100 transitions. [2023-08-30 20:50:00,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:00,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2100 transitions. [2023-08-30 20:50:00,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 116.66666666666667) internal successors, (2100), 18 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:00,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:00,727 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 273.0) internal successors, (5187), 19 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:00,727 INFO L175 Difference]: Start difference. First operand has 137 places, 242 transitions, 2872 flow. Second operand 18 states and 2100 transitions. [2023-08-30 20:50:00,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 470 transitions, 5879 flow [2023-08-30 20:50:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 470 transitions, 5664 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-08-30 20:50:00,800 INFO L231 Difference]: Finished difference. Result has 155 places, 296 transitions, 3960 flow [2023-08-30 20:50:00,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3960, PETRI_PLACES=155, PETRI_TRANSITIONS=296} [2023-08-30 20:50:00,800 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2023-08-30 20:50:00,801 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 296 transitions, 3960 flow [2023-08-30 20:50:00,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:00,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:00,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:00,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:50:01,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 20:50:01,002 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:01,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:01,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1644877099, now seen corresponding path program 15 times [2023-08-30 20:50:01,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:01,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179581156] [2023-08-30 20:50:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:01,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179581156] [2023-08-30 20:50:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179581156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591855323] [2023-08-30 20:50:01,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:50:01,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:01,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:01,126 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:01,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:50:01,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:50:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:50:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:50:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:01,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:01,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591855323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:50:01,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:50:01,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 20:50:01,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451303673] [2023-08-30 20:50:01,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:50:01,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:50:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:50:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:50:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:50:01,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:50:01,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 296 transitions, 3960 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:01,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:50:01,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:50:01,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:02,558 INFO L130 PetriNetUnfolder]: 2548/3878 cut-off events. [2023-08-30 20:50:02,558 INFO L131 PetriNetUnfolder]: For 38879/38905 co-relation queries the response was YES. [2023-08-30 20:50:02,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26825 conditions, 3878 events. 2548/3878 cut-off events. For 38879/38905 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19365 event pairs, 520 based on Foata normal form. 44/3919 useless extension candidates. Maximal degree in co-relation 26770. Up to 1964 conditions per place. [2023-08-30 20:50:02,588 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 281 selfloop transitions, 126 changer transitions 0/416 dead transitions. [2023-08-30 20:50:02,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 416 transitions, 5984 flow [2023-08-30 20:50:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:50:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:50:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1163 transitions. [2023-08-30 20:50:02,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426007326007326 [2023-08-30 20:50:02,590 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1163 transitions. [2023-08-30 20:50:02,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1163 transitions. [2023-08-30 20:50:02,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:02,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1163 transitions. [2023-08-30 20:50:02,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.3) internal successors, (1163), 10 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:02,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:02,594 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:02,594 INFO L175 Difference]: Start difference. First operand has 155 places, 296 transitions, 3960 flow. Second operand 10 states and 1163 transitions. [2023-08-30 20:50:02,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 416 transitions, 5984 flow [2023-08-30 20:50:02,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 416 transitions, 5683 flow, removed 100 selfloop flow, removed 8 redundant places. [2023-08-30 20:50:02,695 INFO L231 Difference]: Finished difference. Result has 160 places, 326 transitions, 4533 flow [2023-08-30 20:50:02,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4533, PETRI_PLACES=160, PETRI_TRANSITIONS=326} [2023-08-30 20:50:02,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-08-30 20:50:02,696 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 326 transitions, 4533 flow [2023-08-30 20:50:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:02,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:02,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:02,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:50:02,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:02,897 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:02,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -975380431, now seen corresponding path program 16 times [2023-08-30 20:50:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338752128] [2023-08-30 20:50:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:02,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:03,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338752128] [2023-08-30 20:50:03,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338752128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:03,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542314845] [2023-08-30 20:50:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:50:03,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:03,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:03,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:03,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:50:03,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:50:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:50:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:50:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:03,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:03,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542314845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:50:03,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:50:03,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 20:50:03,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138448249] [2023-08-30 20:50:03,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:50:03,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:50:03,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:50:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:50:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:50:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-30 20:50:03,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 326 transitions, 4533 flow. Second operand has 19 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:03,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:50:03,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-30 20:50:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:05,107 INFO L130 PetriNetUnfolder]: 2642/4011 cut-off events. [2023-08-30 20:50:05,107 INFO L131 PetriNetUnfolder]: For 40575/40575 co-relation queries the response was YES. [2023-08-30 20:50:05,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 conditions, 4011 events. 2642/4011 cut-off events. For 40575/40575 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19866 event pairs, 321 based on Foata normal form. 26/4037 useless extension candidates. Maximal degree in co-relation 27869. Up to 1584 conditions per place. [2023-08-30 20:50:05,140 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 353 selfloop transitions, 244 changer transitions 0/597 dead transitions. [2023-08-30 20:50:05,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 597 transitions, 8564 flow [2023-08-30 20:50:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 20:50:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 20:50:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3429 transitions. [2023-08-30 20:50:05,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40517546969159873 [2023-08-30 20:50:05,151 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3429 transitions. [2023-08-30 20:50:05,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3429 transitions. [2023-08-30 20:50:05,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:05,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3429 transitions. [2023-08-30 20:50:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.61290322580645) internal successors, (3429), 31 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:05,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:05,162 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:05,163 INFO L175 Difference]: Start difference. First operand has 160 places, 326 transitions, 4533 flow. Second operand 31 states and 3429 transitions. [2023-08-30 20:50:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 597 transitions, 8564 flow [2023-08-30 20:50:05,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 597 transitions, 8395 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-08-30 20:50:05,283 INFO L231 Difference]: Finished difference. Result has 191 places, 408 transitions, 6026 flow [2023-08-30 20:50:05,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6026, PETRI_PLACES=191, PETRI_TRANSITIONS=408} [2023-08-30 20:50:05,284 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2023-08-30 20:50:05,284 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 408 transitions, 6026 flow [2023-08-30 20:50:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.36842105263158) internal successors, (2021), 19 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:05,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:05,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:50:05,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:05,489 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:05,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash 561744499, now seen corresponding path program 17 times [2023-08-30 20:50:05,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:05,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423562980] [2023-08-30 20:50:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:05,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:05,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:05,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423562980] [2023-08-30 20:50:05,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423562980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:05,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238019095] [2023-08-30 20:50:05,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:50:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:05,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:05,617 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:05,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:50:05,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:50:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:50:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:50:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:05,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:05,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238019095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:50:05,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:50:05,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-08-30 20:50:05,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870929896] [2023-08-30 20:50:05,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:50:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:50:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:50:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:50:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:50:06,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-08-30 20:50:06,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 408 transitions, 6026 flow. Second operand has 17 states, 17 states have (on average 106.70588235294117) internal successors, (1814), 17 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:06,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:50:06,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-08-30 20:50:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:07,202 INFO L130 PetriNetUnfolder]: 2608/3945 cut-off events. [2023-08-30 20:50:07,202 INFO L131 PetriNetUnfolder]: For 43084/43084 co-relation queries the response was YES. [2023-08-30 20:50:07,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 3945 events. 2608/3945 cut-off events. For 43084/43084 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19312 event pairs, 345 based on Foata normal form. 26/3971 useless extension candidates. Maximal degree in co-relation 28614. Up to 1634 conditions per place. [2023-08-30 20:50:07,235 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 354 selfloop transitions, 203 changer transitions 0/557 dead transitions. [2023-08-30 20:50:07,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 557 transitions, 8646 flow [2023-08-30 20:50:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:50:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:50:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2110 transitions. [2023-08-30 20:50:07,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067861962598805 [2023-08-30 20:50:07,238 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2110 transitions. [2023-08-30 20:50:07,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2110 transitions. [2023-08-30 20:50:07,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:07,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2110 transitions. [2023-08-30 20:50:07,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.05263157894737) internal successors, (2110), 19 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:07,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:07,245 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 273.0) internal successors, (5460), 20 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:07,245 INFO L175 Difference]: Start difference. First operand has 191 places, 408 transitions, 6026 flow. Second operand 19 states and 2110 transitions. [2023-08-30 20:50:07,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 557 transitions, 8646 flow [2023-08-30 20:50:07,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 557 transitions, 8182 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-08-30 20:50:07,404 INFO L231 Difference]: Finished difference. Result has 204 places, 413 transitions, 6026 flow [2023-08-30 20:50:07,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6026, PETRI_PLACES=204, PETRI_TRANSITIONS=413} [2023-08-30 20:50:07,405 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-08-30 20:50:07,405 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 413 transitions, 6026 flow [2023-08-30 20:50:07,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.70588235294117) internal successors, (1814), 17 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:07,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:07,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:07,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:50:07,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:07,607 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:07,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:07,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1034602387, now seen corresponding path program 18 times [2023-08-30 20:50:07,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:07,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133499123] [2023-08-30 20:50:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:50:07,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:07,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133499123] [2023-08-30 20:50:07,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133499123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:07,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306019487] [2023-08-30 20:50:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:50:07,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:07,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:07,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:50:07,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:50:07,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:50:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:50:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:50:07,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:50:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306019487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:50:08,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:50:08,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-30 20:50:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510319386] [2023-08-30 20:50:08,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:50:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:50:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:50:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:50:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-30 20:50:08,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:50:08,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 413 transitions, 6026 flow. Second operand has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:08,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:50:08,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:50:08,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:09,312 INFO L130 PetriNetUnfolder]: 2549/3864 cut-off events. [2023-08-30 20:50:09,313 INFO L131 PetriNetUnfolder]: For 42182/42195 co-relation queries the response was YES. [2023-08-30 20:50:09,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28278 conditions, 3864 events. 2549/3864 cut-off events. For 42182/42195 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19122 event pairs, 342 based on Foata normal form. 52/3907 useless extension candidates. Maximal degree in co-relation 28212. Up to 1565 conditions per place. [2023-08-30 20:50:09,347 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 294 selfloop transitions, 229 changer transitions 0/547 dead transitions. [2023-08-30 20:50:09,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 547 transitions, 8188 flow [2023-08-30 20:50:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:50:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:50:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1757 transitions. [2023-08-30 20:50:09,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905982905982903 [2023-08-30 20:50:09,349 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1757 transitions. [2023-08-30 20:50:09,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1757 transitions. [2023-08-30 20:50:09,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:09,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1757 transitions. [2023-08-30 20:50:09,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 117.13333333333334) internal successors, (1757), 15 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:09,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:09,353 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 273.0) internal successors, (4368), 16 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:09,353 INFO L175 Difference]: Start difference. First operand has 204 places, 413 transitions, 6026 flow. Second operand 15 states and 1757 transitions. [2023-08-30 20:50:09,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 547 transitions, 8188 flow [2023-08-30 20:50:09,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 547 transitions, 7947 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-08-30 20:50:09,490 INFO L231 Difference]: Finished difference. Result has 206 places, 420 transitions, 6404 flow [2023-08-30 20:50:09,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6404, PETRI_PLACES=206, PETRI_TRANSITIONS=420} [2023-08-30 20:50:09,491 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 176 predicate places. [2023-08-30 20:50:09,491 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 420 transitions, 6404 flow [2023-08-30 20:50:09,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:09,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:09,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:09,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:50:09,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 20:50:09,700 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:09,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash 849317859, now seen corresponding path program 19 times [2023-08-30 20:50:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:09,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041158633] [2023-08-30 20:50:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:09,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041158633] [2023-08-30 20:50:09,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041158633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469554615] [2023-08-30 20:50:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:50:09,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:09,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:09,843 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:09,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:50:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:50:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:10,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469554615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:50:10,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:50:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-30 20:50:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537515221] [2023-08-30 20:50:10,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:50:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:50:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:50:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:50:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:50:10,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:50:10,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 420 transitions, 6404 flow. Second operand has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:10,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:50:10,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:50:10,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:11,081 INFO L130 PetriNetUnfolder]: 2519/3804 cut-off events. [2023-08-30 20:50:11,081 INFO L131 PetriNetUnfolder]: For 45361/45372 co-relation queries the response was YES. [2023-08-30 20:50:11,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 3804 events. 2519/3804 cut-off events. For 45361/45372 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18595 event pairs, 406 based on Foata normal form. 26/3821 useless extension candidates. Maximal degree in co-relation 28580. Up to 1553 conditions per place. [2023-08-30 20:50:11,113 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 267 selfloop transitions, 182 changer transitions 0/473 dead transitions. [2023-08-30 20:50:11,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 473 transitions, 7759 flow [2023-08-30 20:50:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:50:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:50:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1039 transitions. [2023-08-30 20:50:11,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228734228734229 [2023-08-30 20:50:11,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1039 transitions. [2023-08-30 20:50:11,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1039 transitions. [2023-08-30 20:50:11,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:11,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1039 transitions. [2023-08-30 20:50:11,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.44444444444444) internal successors, (1039), 9 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:11,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:11,118 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:11,118 INFO L175 Difference]: Start difference. First operand has 206 places, 420 transitions, 6404 flow. Second operand 9 states and 1039 transitions. [2023-08-30 20:50:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 473 transitions, 7759 flow [2023-08-30 20:50:11,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 473 transitions, 7262 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-30 20:50:11,257 INFO L231 Difference]: Finished difference. Result has 201 places, 422 transitions, 6478 flow [2023-08-30 20:50:11,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6478, PETRI_PLACES=201, PETRI_TRANSITIONS=422} [2023-08-30 20:50:11,258 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2023-08-30 20:50:11,258 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 422 transitions, 6478 flow [2023-08-30 20:50:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:11,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:11,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:11,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 20:50:11,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 20:50:11,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:11,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 103220131, now seen corresponding path program 20 times [2023-08-30 20:50:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:11,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95593264] [2023-08-30 20:50:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:11,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95593264] [2023-08-30 20:50:11,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95593264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:11,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110356813] [2023-08-30 20:50:11,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:50:11,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:11,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:11,601 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:11,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:50:11,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:50:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:50:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:50:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:11,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:50:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110356813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:50:11,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:50:11,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-30 20:50:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437645738] [2023-08-30 20:50:11,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:50:11,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:50:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:50:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:50:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:50:12,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 273 [2023-08-30 20:50:12,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 422 transitions, 6478 flow. Second operand has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:12,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:50:12,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 273 [2023-08-30 20:50:12,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:50:12,955 INFO L130 PetriNetUnfolder]: 2488/3741 cut-off events. [2023-08-30 20:50:12,955 INFO L131 PetriNetUnfolder]: For 47088/47095 co-relation queries the response was YES. [2023-08-30 20:50:12,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28605 conditions, 3741 events. 2488/3741 cut-off events. For 47088/47095 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18057 event pairs, 729 based on Foata normal form. 30/3762 useless extension candidates. Maximal degree in co-relation 28538. Up to 2986 conditions per place. [2023-08-30 20:50:12,989 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 342 selfloop transitions, 96 changer transitions 0/462 dead transitions. [2023-08-30 20:50:12,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 462 transitions, 7628 flow [2023-08-30 20:50:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:50:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:50:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1033 transitions. [2023-08-30 20:50:12,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42043142043142046 [2023-08-30 20:50:12,990 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1033 transitions. [2023-08-30 20:50:12,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1033 transitions. [2023-08-30 20:50:12,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:50:12,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1033 transitions. [2023-08-30 20:50:12,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.77777777777777) internal successors, (1033), 9 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:12,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:12,994 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:12,994 INFO L175 Difference]: Start difference. First operand has 201 places, 422 transitions, 6478 flow. Second operand 9 states and 1033 transitions. [2023-08-30 20:50:12,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 462 transitions, 7628 flow [2023-08-30 20:50:13,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 462 transitions, 7404 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-08-30 20:50:13,219 INFO L231 Difference]: Finished difference. Result has 202 places, 422 transitions, 6444 flow [2023-08-30 20:50:13,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6444, PETRI_PLACES=202, PETRI_TRANSITIONS=422} [2023-08-30 20:50:13,220 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-08-30 20:50:13,220 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 422 transitions, 6444 flow [2023-08-30 20:50:13,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:50:13,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:50:13,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:50:13,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-30 20:50:13,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:13,421 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:50:13,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:50:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 108858239, now seen corresponding path program 2 times [2023-08-30 20:50:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:50:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154357343] [2023-08-30 20:50:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:50:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:50:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:50:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:50:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:50:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154357343] [2023-08-30 20:50:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154357343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:50:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180547191] [2023-08-30 20:50:14,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:50:14,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:50:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:50:14,931 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:50:14,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:50:15,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:50:15,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:50:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 20:50:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:50:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:50:15,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-30 20:50:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:50:15,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-30 20:50:16,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:50:16,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:50:16,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:50:16,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 76 [2023-08-30 20:50:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:50:16,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:50:16,871 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse5 (+ c_~A~0.offset (* 4 c_~M~0))) (.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (and (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4)) (.cse1 (select .cse3 c_~A~0.offset))) (or (<= .cse0 .cse1) (= .cse2 .cse0) (<= .cse2 c_~max1~0) (<= .cse1 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 .cse5)) (.cse6 (select .cse8 .cse4))) (or (= .cse6 .cse7) (<= .cse7 c_~max2~0) (< c_~max2~0 (select .cse8 c_~A~0.offset)) (<= .cse6 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse10 c_~A~0.offset))) (or (= c_~max1~0 .cse9) (< .cse9 (select .cse10 .cse5)) (< c_~max1~0 (select .cse10 .cse4)) (<= .cse9 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4)) (.cse11 (select .cse12 c_~A~0.offset))) (or (< .cse11 (select .cse12 .cse5)) (= .cse13 .cse11) (<= .cse13 c_~max1~0) (<= .cse11 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse15 (select .cse14 .cse4))) (or (< c_~max2~0 (select .cse14 .cse5)) (< c_~max2~0 (select .cse14 c_~A~0.offset)) (= .cse15 c_~max2~0) (<= .cse15 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse16 (select .cse17 .cse5))) (or (<= .cse16 c_~max2~0) (< c_~max2~0 (select .cse17 c_~A~0.offset)) (< c_~max1~0 (select .cse17 .cse4)) (= c_~max1~0 .cse16))))) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse20 c_~A~0.offset)) (.cse18 (select .cse20 .cse5))) (or (<= .cse18 .cse19) (< c_~max1~0 (select .cse20 .cse4)) (<= .cse19 c_~max2~0) (= c_~max1~0 .cse18))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse21 .cse5)) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-08-30 20:50:17,102 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~M~0 0) (let ((.cse4 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4))) (.cse5 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse1 (select .cse3 c_~A~0.offset)) (.cse0 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4))) (or (<= .cse0 .cse1) (<= .cse1 c_~max2~0) (= .cse0 .cse2) (<= .cse2 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse7 (select .cse8 c_~A~0.offset)) (.cse6 (select .cse8 .cse5))) (or (<= .cse6 .cse7) (<= .cse7 c_~max2~0) (= c_~max1~0 .cse6) (< c_~max1~0 (select .cse8 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse9 (select .cse11 c_~A~0.offset)) (.cse10 (select .cse11 .cse4))) (or (= .cse9 .cse10) (<= .cse9 c_~max2~0) (< .cse9 (select .cse11 .cse5)) (<= .cse10 c_~max1~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse12 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse4))) (or (< c_~max2~0 (select .cse12 c_~A~0.offset)) (< c_~max2~0 (select .cse12 .cse5)) (<= .cse13 c_~max1~0) (= c_~max2~0 .cse13))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse15 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse14 (select .cse15 c_~A~0.offset))) (or (<= .cse14 c_~max2~0) (= c_~max1~0 .cse14) (< .cse14 (select .cse15 .cse5)) (< c_~max1~0 (select .cse15 .cse4)))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (or (< c_~max2~0 (select .cse16 c_~A~0.offset)) (< c_~max2~0 (select .cse16 .cse5)) (< c_~max1~0 (select .cse16 .cse4)))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse17 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse19 (select .cse17 .cse4)) (.cse18 (select .cse17 .cse5))) (or (< c_~max2~0 (select .cse17 c_~A~0.offset)) (= .cse18 .cse19) (<= .cse19 c_~max1~0) (<= .cse18 c_~max2~0))))) (forall ((v_ArrVal_1101 (Array Int Int)) (v_ArrVal_1100 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1100) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1101) c_~A~0.base))) (let ((.cse20 (select .cse21 .cse5))) (or (= c_~max1~0 .cse20) (< c_~max2~0 (select .cse21 c_~A~0.offset)) (<= .cse20 c_~max2~0) (< c_~max1~0 (select .cse21 .cse4))))))))) is different from false [2023-08-30 20:50:17,236 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:50:17,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3307 treesize of output 2934 [2023-08-30 20:50:17,351 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1835 treesize of output 1826 [2023-08-30 20:50:17,437 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1805 treesize of output 1766 [2023-08-30 20:50:17,536 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1745 treesize of output 1714 [2023-08-30 20:50:17,636 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1693 treesize of output 1688 [2023-08-30 20:50:17,748 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1667 treesize of output 1665 [2023-08-30 20:50:17,833 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1644 treesize of output 1619 [2023-08-30 20:50:17,932 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:17,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1598 treesize of output 1604 [2023-08-30 20:50:18,031 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1583 treesize of output 1574 [2023-08-30 20:50:18,137 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1553 treesize of output 1518 [2023-08-30 20:50:18,244 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1497 treesize of output 1490 [2023-08-30 20:50:18,351 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1469 treesize of output 1471 [2023-08-30 20:50:18,451 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1450 treesize of output 1433 [2023-08-30 20:50:18,568 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1412 treesize of output 1391 [2023-08-30 20:50:18,712 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1370 treesize of output 1370 [2023-08-30 20:50:18,850 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:18,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1349 treesize of output 1326 [2023-08-30 20:50:19,000 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 20:50:19,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1305 treesize of output 1304 [2023-08-30 20:53:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:53:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180547191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:53:32,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:53:32,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-30 20:53:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001945512] [2023-08-30 20:53:32,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:53:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-30 20:53:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:53:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-30 20:53:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1207, Unknown=2, NotChecked=142, Total=1482 [2023-08-30 20:53:32,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 273 [2023-08-30 20:53:32,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 422 transitions, 6444 flow. Second operand has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:53:32,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:53:32,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 273 [2023-08-30 20:53:32,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:53:51,727 INFO L130 PetriNetUnfolder]: 6074/9547 cut-off events. [2023-08-30 20:53:51,727 INFO L131 PetriNetUnfolder]: For 133966/133966 co-relation queries the response was YES. [2023-08-30 20:53:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 9547 events. 6074/9547 cut-off events. For 133966/133966 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 59367 event pairs, 297 based on Foata normal form. 10/9557 useless extension candidates. Maximal degree in co-relation 72774. Up to 4884 conditions per place. [2023-08-30 20:53:51,911 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 767 selfloop transitions, 661 changer transitions 18/1446 dead transitions. [2023-08-30 20:53:51,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1446 transitions, 22528 flow [2023-08-30 20:53:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 20:53:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 20:53:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5102 transitions. [2023-08-30 20:53:51,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875176105945337 [2023-08-30 20:53:51,917 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5102 transitions. [2023-08-30 20:53:51,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5102 transitions. [2023-08-30 20:53:51,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:53:51,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5102 transitions. [2023-08-30 20:53:51,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 78.49230769230769) internal successors, (5102), 65 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:53:51,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:53:51,937 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 273.0) internal successors, (18018), 66 states have internal predecessors, (18018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:53:51,938 INFO L175 Difference]: Start difference. First operand has 202 places, 422 transitions, 6444 flow. Second operand 65 states and 5102 transitions. [2023-08-30 20:53:51,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1446 transitions, 22528 flow [2023-08-30 20:53:52,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1446 transitions, 21758 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 20:53:52,779 INFO L231 Difference]: Finished difference. Result has 286 places, 1008 transitions, 18203 flow [2023-08-30 20:53:52,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=18203, PETRI_PLACES=286, PETRI_TRANSITIONS=1008} [2023-08-30 20:53:52,780 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2023-08-30 20:53:52,780 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1008 transitions, 18203 flow [2023-08-30 20:53:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 70.7948717948718) internal successors, (2761), 39 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:53:52,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:53:52,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:53:52,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:53:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:53:52,982 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:53:52,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:53:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1055356433, now seen corresponding path program 3 times [2023-08-30 20:53:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:53:52,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287607936] [2023-08-30 20:53:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:53:52,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:53:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:53:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:53:54,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:53:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287607936] [2023-08-30 20:53:54,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287607936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:53:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914034981] [2023-08-30 20:53:54,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:53:54,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:53:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:53:54,150 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:53:54,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:53:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:53:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:53:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:53:54,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:53:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:53:54,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:53:54,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 81 [2023-08-30 20:53:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:53:55,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:53:57,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:53:57,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 371 treesize of output 607 [2023-08-30 20:55:53,861 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 20:56:21,400 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 20:57:40,368 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 20:59:30,639 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:01:05,635 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-30 21:01:43,710 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Killed by 15