./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:35:03,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:35:03,372 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:35:03,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:35:03,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:35:03,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:35:03,414 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:35:03,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:35:03,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:35:03,423 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:35:03,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:35:03,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:35:03,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:35:03,428 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:35:03,428 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:35:03,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:35:03,429 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:35:03,429 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:35:03,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:35:03,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:35:03,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:35:03,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:35:03,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:35:03,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:35:03,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:35:03,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:35:03,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:35:03,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:35:03,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:35:03,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:35:03,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:35:03,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:35:03,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:35:03,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:35:03,436 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:35:03,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:35:03,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:35:03,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:35:03,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:35:03,437 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:35:03,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:35:03,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:35:03,438 INFO L153 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2023-11-23 22:35:03,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:35:03,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:35:03,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:35:03,782 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:35:03,783 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:35:03,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-23 22:35:06,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:35:07,352 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:35:07,354 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2023-11-23 22:35:07,365 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/data/b2e5dc479/58d9b958ea2e43ce991aa4da7a32be66/FLAG4f6f7e4f3 [2023-11-23 22:35:07,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/data/b2e5dc479/58d9b958ea2e43ce991aa4da7a32be66 [2023-11-23 22:35:07,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:35:07,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:35:07,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:35:07,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:35:07,405 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:35:07,409 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,410 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367a0673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07, skipping insertion in model container [2023-11-23 22:35:07,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,450 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:35:07,675 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-23 22:35:07,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:35:07,695 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:35:07,719 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-23 22:35:07,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:35:07,732 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:35:07,733 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:35:07,741 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:35:07,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07 WrapperNode [2023-11-23 22:35:07,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:35:07,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:35:07,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:35:07,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:35:07,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,809 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 203 [2023-11-23 22:35:07,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:35:07,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:35:07,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:35:07,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:35:07,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,848 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,872 INFO L189 HeapSplitter]: Split 18 memory accesses to 4 slices as follows [2, 2, 12, 2] [2023-11-23 22:35:07,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:35:07,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:35:07,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:35:07,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:35:07,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (1/1) ... [2023-11-23 22:35:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:35:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:07,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:35:07,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:35:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:35:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:35:08,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:35:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:35:08,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:35:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:35:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:35:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:35:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:35:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:35:08,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:35:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:35:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:35:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:35:08,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:35:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:35:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:35:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:35:08,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:35:08,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:35:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:35:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:35:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:35:08,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:35:08,014 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:35:08,157 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:35:08,160 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:35:08,538 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:35:08,970 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:35:08,970 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 22:35:08,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:08 BoogieIcfgContainer [2023-11-23 22:35:08,972 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:35:08,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:35:08,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:35:08,978 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:35:08,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:35:07" (1/3) ... [2023-11-23 22:35:08,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570eec2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:08, skipping insertion in model container [2023-11-23 22:35:08,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:07" (2/3) ... [2023-11-23 22:35:08,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570eec2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:08, skipping insertion in model container [2023-11-23 22:35:08,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:08" (3/3) ... [2023-11-23 22:35:08,983 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-23 22:35:08,994 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:35:09,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:35:09,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:35:09,006 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:35:09,069 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:35:09,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2023-11-23 22:35:09,158 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-23 22:35:09,158 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:35:09,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-23 22:35:09,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2023-11-23 22:35:09,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2023-11-23 22:35:09,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:35:09,224 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=LoopHeads, 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;@ffcdde1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:35:09,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 22:35:09,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:35:09,239 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-23 22:35:09,239 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:35:09,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:09,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:09,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:09,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash 344802912, now seen corresponding path program 1 times [2023-11-23 22:35:09,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:09,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015942529] [2023-11-23 22:35:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:09,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:09,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015942529] [2023-11-23 22:35:09,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015942529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:09,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:09,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:35:09,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664645924] [2023-11-23 22:35:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:35:09,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:35:09,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:35:09,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-23 22:35:09,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:09,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-23 22:35:09,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:09,869 INFO L124 PetriNetUnfolderBase]: 101/199 cut-off events. [2023-11-23 22:35:09,869 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-23 22:35:09,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 199 events. 101/199 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 24 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 317. Up to 122 conditions per place. [2023-11-23 22:35:09,874 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 29 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-11-23 22:35:09,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 159 flow [2023-11-23 22:35:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:35:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:35:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2023-11-23 22:35:09,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2023-11-23 22:35:09,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2023-11-23 22:35:09,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2023-11-23 22:35:09,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:09,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2023-11-23 22:35:09,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,900 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 49 transitions. [2023-11-23 22:35:09,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 159 flow [2023-11-23 22:35:09,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:35:09,906 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 71 flow [2023-11-23 22:35:09,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2023-11-23 22:35:09,912 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-11-23 22:35:09,913 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 71 flow [2023-11-23 22:35:09,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:09,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:09,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:09,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:35:09,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:09,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1629858922, now seen corresponding path program 1 times [2023-11-23 22:35:09,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:09,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320766916] [2023-11-23 22:35:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:09,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:10,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:10,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320766916] [2023-11-23 22:35:10,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320766916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:10,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:10,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:10,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303450727] [2023-11-23 22:35:10,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:10,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:10,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:10,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:10,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:10,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:10,471 INFO L124 PetriNetUnfolderBase]: 195/348 cut-off events. [2023-11-23 22:35:10,471 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-23 22:35:10,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 348 events. 195/348 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1373 event pairs, 66 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 210. Up to 201 conditions per place. [2023-11-23 22:35:10,481 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 40 selfloop transitions, 9 changer transitions 1/52 dead transitions. [2023-11-23 22:35:10,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 52 transitions, 244 flow [2023-11-23 22:35:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-23 22:35:10,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-23 22:35:10,489 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-23 22:35:10,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-23 22:35:10,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:10,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-23 22:35:10,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,497 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,497 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 71 flow. Second operand 5 states and 66 transitions. [2023-11-23 22:35:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 52 transitions, 244 flow [2023-11-23 22:35:10,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 52 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:35:10,510 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 126 flow [2023-11-23 22:35:10,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-11-23 22:35:10,512 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-11-23 22:35:10,512 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 126 flow [2023-11-23 22:35:10,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:10,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:10,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:35:10,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:10,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:10,514 INFO L85 PathProgramCache]: Analyzing trace with hash -854956140, now seen corresponding path program 2 times [2023-11-23 22:35:10,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:10,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57894025] [2023-11-23 22:35:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57894025] [2023-11-23 22:35:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57894025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:10,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:10,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:35:10,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617213009] [2023-11-23 22:35:10,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:10,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:35:10,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:35:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:35:10,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:10,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:10,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:10,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:10,960 INFO L124 PetriNetUnfolderBase]: 242/451 cut-off events. [2023-11-23 22:35:10,960 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-23 22:35:10,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 451 events. 242/451 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1991 event pairs, 27 based on Foata normal form. 14/463 useless extension candidates. Maximal degree in co-relation 599. Up to 130 conditions per place. [2023-11-23 22:35:10,965 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 65 selfloop transitions, 12 changer transitions 1/80 dead transitions. [2023-11-23 22:35:10,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 80 transitions, 449 flow [2023-11-23 22:35:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:35:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:35:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2023-11-23 22:35:10,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2023-11-23 22:35:10,967 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 95 transitions. [2023-11-23 22:35:10,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 95 transitions. [2023-11-23 22:35:10,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:10,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 95 transitions. [2023-11-23 22:35:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,971 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,971 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 126 flow. Second operand 7 states and 95 transitions. [2023-11-23 22:35:10,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 80 transitions, 449 flow [2023-11-23 22:35:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:35:10,976 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 214 flow [2023-11-23 22:35:10,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-11-23 22:35:10,977 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-11-23 22:35:10,977 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 214 flow [2023-11-23 22:35:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:10,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:10,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:35:10,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:10,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash 449448984, now seen corresponding path program 3 times [2023-11-23 22:35:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101746777] [2023-11-23 22:35:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:11,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:11,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101746777] [2023-11-23 22:35:11,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101746777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:11,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:11,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:11,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195119954] [2023-11-23 22:35:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:11,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:11,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:11,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:11,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:11,290 INFO L124 PetriNetUnfolderBase]: 308/567 cut-off events. [2023-11-23 22:35:11,291 INFO L125 PetriNetUnfolderBase]: For 920/920 co-relation queries the response was YES. [2023-11-23 22:35:11,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 567 events. 308/567 cut-off events. For 920/920 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2548 event pairs, 97 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 1427. Up to 279 conditions per place. [2023-11-23 22:35:11,298 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 10 changer transitions 4/71 dead transitions. [2023-11-23 22:35:11,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 509 flow [2023-11-23 22:35:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-23 22:35:11,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-23 22:35:11,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-23 22:35:11,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-23 22:35:11,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:11,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-23 22:35:11,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,329 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 214 flow. Second operand 5 states and 66 transitions. [2023-11-23 22:35:11,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 509 flow [2023-11-23 22:35:11,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 497 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-23 22:35:11,337 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 261 flow [2023-11-23 22:35:11,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-23 22:35:11,339 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-11-23 22:35:11,339 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 261 flow [2023-11-23 22:35:11,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:11,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:35:11,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:11,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1052480995, now seen corresponding path program 1 times [2023-11-23 22:35:11,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:11,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581980481] [2023-11-23 22:35:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:11,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581980481] [2023-11-23 22:35:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581980481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:11,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:11,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468230231] [2023-11-23 22:35:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:11,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:11,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:11,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:11,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:11,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:11,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:11,671 INFO L124 PetriNetUnfolderBase]: 327/596 cut-off events. [2023-11-23 22:35:11,671 INFO L125 PetriNetUnfolderBase]: For 1331/1335 co-relation queries the response was YES. [2023-11-23 22:35:11,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 conditions, 596 events. 327/596 cut-off events. For 1331/1335 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2746 event pairs, 116 based on Foata normal form. 4/594 useless extension candidates. Maximal degree in co-relation 1915. Up to 314 conditions per place. [2023-11-23 22:35:11,678 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 54 selfloop transitions, 7 changer transitions 8/72 dead transitions. [2023-11-23 22:35:11,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 545 flow [2023-11-23 22:35:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-23 22:35:11,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-11-23 22:35:11,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-23 22:35:11,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-23 22:35:11,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:11,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-23 22:35:11,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,682 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,683 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 261 flow. Second operand 5 states and 70 transitions. [2023-11-23 22:35:11,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 545 flow [2023-11-23 22:35:11,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 506 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:11,691 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 263 flow [2023-11-23 22:35:11,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-23 22:35:11,692 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-11-23 22:35:11,693 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 263 flow [2023-11-23 22:35:11,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:11,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:11,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:11,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:35:11,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:11,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -436614979, now seen corresponding path program 2 times [2023-11-23 22:35:11,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:11,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301805882] [2023-11-23 22:35:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:11,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301805882] [2023-11-23 22:35:11,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301805882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294139186] [2023-11-23 22:35:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:35:11,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:11,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:11,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:11,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:35:11,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:35:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:11,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:35:11,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:12,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294139186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:12,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:12,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-23 22:35:12,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121813757] [2023-11-23 22:35:12,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:12,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:35:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:35:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:35:12,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:12,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 263 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:12,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:12,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:12,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:12,538 INFO L124 PetriNetUnfolderBase]: 448/779 cut-off events. [2023-11-23 22:35:12,538 INFO L125 PetriNetUnfolderBase]: For 1965/1965 co-relation queries the response was YES. [2023-11-23 22:35:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2848 conditions, 779 events. 448/779 cut-off events. For 1965/1965 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3373 event pairs, 22 based on Foata normal form. 12/789 useless extension candidates. Maximal degree in co-relation 2267. Up to 152 conditions per place. [2023-11-23 22:35:12,549 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 80 selfloop transitions, 52 changer transitions 2/135 dead transitions. [2023-11-23 22:35:12,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 135 transitions, 1058 flow [2023-11-23 22:35:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:35:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 22:35:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2023-11-23 22:35:12,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-11-23 22:35:12,553 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 140 transitions. [2023-11-23 22:35:12,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 140 transitions. [2023-11-23 22:35:12,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:12,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 140 transitions. [2023-11-23 22:35:12,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.0) internal successors, (140), 14 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:12,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:12,559 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:12,560 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 263 flow. Second operand 14 states and 140 transitions. [2023-11-23 22:35:12,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 135 transitions, 1058 flow [2023-11-23 22:35:12,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 135 transitions, 1001 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-23 22:35:12,572 INFO L231 Difference]: Finished difference. Result has 66 places, 80 transitions, 680 flow [2023-11-23 22:35:12,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=680, PETRI_PLACES=66, PETRI_TRANSITIONS=80} [2023-11-23 22:35:12,577 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 39 predicate places. [2023-11-23 22:35:12,577 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 80 transitions, 680 flow [2023-11-23 22:35:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:12,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:12,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:12,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:12,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 554147766, now seen corresponding path program 4 times [2023-11-23 22:35:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200233651] [2023-11-23 22:35:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:12,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:12,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200233651] [2023-11-23 22:35:12,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200233651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:12,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:12,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:12,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350724524] [2023-11-23 22:35:12,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:12,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:12,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:12,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 680 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:12,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:12,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:13,178 INFO L124 PetriNetUnfolderBase]: 437/762 cut-off events. [2023-11-23 22:35:13,178 INFO L125 PetriNetUnfolderBase]: For 2499/2499 co-relation queries the response was YES. [2023-11-23 22:35:13,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3138 conditions, 762 events. 437/762 cut-off events. For 2499/2499 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3285 event pairs, 147 based on Foata normal form. 8/768 useless extension candidates. Maximal degree in co-relation 2758. Up to 474 conditions per place. [2023-11-23 22:35:13,189 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 78 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2023-11-23 22:35:13,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 1022 flow [2023-11-23 22:35:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-23 22:35:13,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-23 22:35:13,191 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-23 22:35:13,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-23 22:35:13,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:13,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-23 22:35:13,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,193 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,193 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 680 flow. Second operand 5 states and 65 transitions. [2023-11-23 22:35:13,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 1022 flow [2023-11-23 22:35:13,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 957 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:13,211 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 684 flow [2023-11-23 22:35:13,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=684, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2023-11-23 22:35:13,212 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2023-11-23 22:35:13,212 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 684 flow [2023-11-23 22:35:13,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:13,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:13,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:35:13,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:13,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash 357640129, now seen corresponding path program 3 times [2023-11-23 22:35:13,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787708625] [2023-11-23 22:35:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:13,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787708625] [2023-11-23 22:35:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787708625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:13,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:35:13,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254630861] [2023-11-23 22:35:13,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:13,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:35:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:35:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:35:13,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:13,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 684 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:13,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:13,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:13,647 INFO L124 PetriNetUnfolderBase]: 449/782 cut-off events. [2023-11-23 22:35:13,648 INFO L125 PetriNetUnfolderBase]: For 2624/2624 co-relation queries the response was YES. [2023-11-23 22:35:13,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 782 events. 449/782 cut-off events. For 2624/2624 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3395 event pairs, 149 based on Foata normal form. 8/788 useless extension candidates. Maximal degree in co-relation 2946. Up to 474 conditions per place. [2023-11-23 22:35:13,658 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 82 selfloop transitions, 34 changer transitions 0/117 dead transitions. [2023-11-23 22:35:13,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1110 flow [2023-11-23 22:35:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2023-11-23 22:35:13,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2023-11-23 22:35:13,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 74 transitions. [2023-11-23 22:35:13,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 74 transitions. [2023-11-23 22:35:13,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:13,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 74 transitions. [2023-11-23 22:35:13,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,662 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,663 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 684 flow. Second operand 6 states and 74 transitions. [2023-11-23 22:35:13,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1110 flow [2023-11-23 22:35:13,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 117 transitions, 1038 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:35:13,678 INFO L231 Difference]: Finished difference. Result has 70 places, 84 transitions, 725 flow [2023-11-23 22:35:13,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=70, PETRI_TRANSITIONS=84} [2023-11-23 22:35:13,682 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2023-11-23 22:35:13,682 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 84 transitions, 725 flow [2023-11-23 22:35:13,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:13,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:35:13,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:13,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash 792013491, now seen corresponding path program 4 times [2023-11-23 22:35:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:13,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439359719] [2023-11-23 22:35:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439359719] [2023-11-23 22:35:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439359719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:13,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:13,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310045247] [2023-11-23 22:35:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:13,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:13,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 84 transitions, 725 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:13,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:13,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:13,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:14,022 INFO L124 PetriNetUnfolderBase]: 406/734 cut-off events. [2023-11-23 22:35:14,022 INFO L125 PetriNetUnfolderBase]: For 2509/2522 co-relation queries the response was YES. [2023-11-23 22:35:14,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 734 events. 406/734 cut-off events. For 2509/2522 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3323 event pairs, 131 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 2709. Up to 436 conditions per place. [2023-11-23 22:35:14,032 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 64 selfloop transitions, 23 changer transitions 5/110 dead transitions. [2023-11-23 22:35:14,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 1050 flow [2023-11-23 22:35:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-23 22:35:14,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-23 22:35:14,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-23 22:35:14,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-23 22:35:14,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:14,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-23 22:35:14,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,036 INFO L175 Difference]: Start difference. First operand has 70 places, 84 transitions, 725 flow. Second operand 5 states and 65 transitions. [2023-11-23 22:35:14,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 1050 flow [2023-11-23 22:35:14,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:35:14,054 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 716 flow [2023-11-23 22:35:14,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=716, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2023-11-23 22:35:14,056 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2023-11-23 22:35:14,056 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 716 flow [2023-11-23 22:35:14,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:14,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:14,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:35:14,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:14,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1419093412, now seen corresponding path program 5 times [2023-11-23 22:35:14,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:14,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323113818] [2023-11-23 22:35:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323113818] [2023-11-23 22:35:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323113818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:14,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:14,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:35:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865509803] [2023-11-23 22:35:14,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:14,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:35:14,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:35:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:35:14,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:14,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 83 transitions, 716 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:14,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:14,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:14,451 INFO L124 PetriNetUnfolderBase]: 517/900 cut-off events. [2023-11-23 22:35:14,451 INFO L125 PetriNetUnfolderBase]: For 2855/2855 co-relation queries the response was YES. [2023-11-23 22:35:14,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 900 events. 517/900 cut-off events. For 2855/2855 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4085 event pairs, 145 based on Foata normal form. 10/908 useless extension candidates. Maximal degree in co-relation 3232. Up to 482 conditions per place. [2023-11-23 22:35:14,462 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 92 selfloop transitions, 30 changer transitions 0/123 dead transitions. [2023-11-23 22:35:14,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 123 transitions, 1191 flow [2023-11-23 22:35:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2023-11-23 22:35:14,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-11-23 22:35:14,464 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 76 transitions. [2023-11-23 22:35:14,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 76 transitions. [2023-11-23 22:35:14,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:14,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 76 transitions. [2023-11-23 22:35:14,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,465 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,466 INFO L175 Difference]: Start difference. First operand has 72 places, 83 transitions, 716 flow. Second operand 6 states and 76 transitions. [2023-11-23 22:35:14,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 123 transitions, 1191 flow [2023-11-23 22:35:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1135 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-23 22:35:14,484 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 781 flow [2023-11-23 22:35:14,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=781, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2023-11-23 22:35:14,485 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2023-11-23 22:35:14,485 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 781 flow [2023-11-23 22:35:14,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:14,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:14,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:35:14,486 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:14,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash 105179288, now seen corresponding path program 6 times [2023-11-23 22:35:14,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:14,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888390449] [2023-11-23 22:35:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:14,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:14,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888390449] [2023-11-23 22:35:14,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888390449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:14,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:14,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:14,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571266201] [2023-11-23 22:35:14,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:14,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:14,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 781 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:14,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:14,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:14,850 INFO L124 PetriNetUnfolderBase]: 434/792 cut-off events. [2023-11-23 22:35:14,850 INFO L125 PetriNetUnfolderBase]: For 2866/2873 co-relation queries the response was YES. [2023-11-23 22:35:14,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3361 conditions, 792 events. 434/792 cut-off events. For 2866/2873 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3795 event pairs, 131 based on Foata normal form. 2/783 useless extension candidates. Maximal degree in co-relation 2907. Up to 406 conditions per place. [2023-11-23 22:35:14,861 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 71 selfloop transitions, 29 changer transitions 2/108 dead transitions. [2023-11-23 22:35:14,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 108 transitions, 1130 flow [2023-11-23 22:35:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-23 22:35:14,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2023-11-23 22:35:14,863 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-23 22:35:14,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-23 22:35:14,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:14,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-23 22:35:14,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,865 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,865 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 781 flow. Second operand 5 states and 66 transitions. [2023-11-23 22:35:14,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 108 transitions, 1130 flow [2023-11-23 22:35:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 1067 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-23 22:35:14,884 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 864 flow [2023-11-23 22:35:14,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=864, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2023-11-23 22:35:14,885 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2023-11-23 22:35:14,886 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 864 flow [2023-11-23 22:35:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:14,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:14,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:14,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:35:14,887 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:14,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1754788501, now seen corresponding path program 5 times [2023-11-23 22:35:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457454763] [2023-11-23 22:35:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457454763] [2023-11-23 22:35:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457454763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:15,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:15,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:35:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688494584] [2023-11-23 22:35:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:35:15,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:35:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:35:15,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:15,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 864 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:15,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:15,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:15,317 INFO L124 PetriNetUnfolderBase]: 542/951 cut-off events. [2023-11-23 22:35:15,317 INFO L125 PetriNetUnfolderBase]: For 3432/3432 co-relation queries the response was YES. [2023-11-23 22:35:15,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 951 events. 542/951 cut-off events. For 3432/3432 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4418 event pairs, 160 based on Foata normal form. 16/965 useless extension candidates. Maximal degree in co-relation 3496. Up to 453 conditions per place. [2023-11-23 22:35:15,329 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 82 selfloop transitions, 35 changer transitions 1/119 dead transitions. [2023-11-23 22:35:15,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 119 transitions, 1222 flow [2023-11-23 22:35:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2023-11-23 22:35:15,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-11-23 22:35:15,331 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 77 transitions. [2023-11-23 22:35:15,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 77 transitions. [2023-11-23 22:35:15,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:15,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 77 transitions. [2023-11-23 22:35:15,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,333 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 864 flow. Second operand 6 states and 77 transitions. [2023-11-23 22:35:15,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 119 transitions, 1222 flow [2023-11-23 22:35:15,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 1176 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:15,350 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 924 flow [2023-11-23 22:35:15,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2023-11-23 22:35:15,351 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2023-11-23 22:35:15,351 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 924 flow [2023-11-23 22:35:15,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:15,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:35:15,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -107704447, now seen corresponding path program 6 times [2023-11-23 22:35:15,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:15,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226761443] [2023-11-23 22:35:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:15,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:15,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226761443] [2023-11-23 22:35:15,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226761443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:15,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:15,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:35:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353854455] [2023-11-23 22:35:15,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:15,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2023-11-23 22:35:15,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 924 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:15,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2023-11-23 22:35:15,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:15,756 INFO L124 PetriNetUnfolderBase]: 458/818 cut-off events. [2023-11-23 22:35:15,757 INFO L125 PetriNetUnfolderBase]: For 3496/3521 co-relation queries the response was YES. [2023-11-23 22:35:15,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 818 events. 458/818 cut-off events. For 3496/3521 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3871 event pairs, 156 based on Foata normal form. 4/807 useless extension candidates. Maximal degree in co-relation 3324. Up to 446 conditions per place. [2023-11-23 22:35:15,769 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 62 selfloop transitions, 27 changer transitions 5/112 dead transitions. [2023-11-23 22:35:15,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 1184 flow [2023-11-23 22:35:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-23 22:35:15,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-23 22:35:15,771 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-23 22:35:15,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-23 22:35:15,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:15,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-23 22:35:15,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,774 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 924 flow. Second operand 5 states and 65 transitions. [2023-11-23 22:35:15,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 1184 flow [2023-11-23 22:35:15,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 1098 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-23 22:35:15,794 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 882 flow [2023-11-23 22:35:15,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=882, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2023-11-23 22:35:15,795 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 50 predicate places. [2023-11-23 22:35:15,796 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 882 flow [2023-11-23 22:35:15,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:15,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:15,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:35:15,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:15,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash -128729452, now seen corresponding path program 7 times [2023-11-23 22:35:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:15,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351555995] [2023-11-23 22:35:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:15,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:35:15,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:15,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351555995] [2023-11-23 22:35:15,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351555995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:15,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 22:35:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361271278] [2023-11-23 22:35:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:15,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:35:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:35:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:35:15,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:15,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:15,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:15,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:15,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:16,170 INFO L124 PetriNetUnfolderBase]: 499/853 cut-off events. [2023-11-23 22:35:16,170 INFO L125 PetriNetUnfolderBase]: For 3225/3225 co-relation queries the response was YES. [2023-11-23 22:35:16,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3551 conditions, 853 events. 499/853 cut-off events. For 3225/3225 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3766 event pairs, 148 based on Foata normal form. 10/861 useless extension candidates. Maximal degree in co-relation 2970. Up to 470 conditions per place. [2023-11-23 22:35:16,181 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 84 selfloop transitions, 31 changer transitions 1/117 dead transitions. [2023-11-23 22:35:16,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 1200 flow [2023-11-23 22:35:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-23 22:35:16,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2023-11-23 22:35:16,183 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-23 22:35:16,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-23 22:35:16,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:16,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-23 22:35:16,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,185 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 882 flow. Second operand 6 states and 73 transitions. [2023-11-23 22:35:16,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 1200 flow [2023-11-23 22:35:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 1138 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-23 22:35:16,201 INFO L231 Difference]: Finished difference. Result has 76 places, 94 transitions, 882 flow [2023-11-23 22:35:16,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=882, PETRI_PLACES=76, PETRI_TRANSITIONS=94} [2023-11-23 22:35:16,202 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2023-11-23 22:35:16,202 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 94 transitions, 882 flow [2023-11-23 22:35:16,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:16,202 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] [2023-11-23 22:35:16,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:35:16,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:16,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1104857327, now seen corresponding path program 1 times [2023-11-23 22:35:16,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:16,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543510969] [2023-11-23 22:35:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:16,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543510969] [2023-11-23 22:35:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543510969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:16,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540104481] [2023-11-23 22:35:16,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:16,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:16,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-23 22:35:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 94 transitions, 882 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-23 22:35:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:16,538 INFO L124 PetriNetUnfolderBase]: 377/737 cut-off events. [2023-11-23 22:35:16,538 INFO L125 PetriNetUnfolderBase]: For 3316/3353 co-relation queries the response was YES. [2023-11-23 22:35:16,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3082 conditions, 737 events. 377/737 cut-off events. For 3316/3353 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3690 event pairs, 169 based on Foata normal form. 23/744 useless extension candidates. Maximal degree in co-relation 2612. Up to 583 conditions per place. [2023-11-23 22:35:16,548 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 67 selfloop transitions, 2 changer transitions 15/110 dead transitions. [2023-11-23 22:35:16,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 1164 flow [2023-11-23 22:35:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:35:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:35:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-23 22:35:16,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-23 22:35:16,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-23 22:35:16,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-23 22:35:16,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:16,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-23 22:35:16,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,552 INFO L175 Difference]: Start difference. First operand has 76 places, 94 transitions, 882 flow. Second operand 5 states and 60 transitions. [2023-11-23 22:35:16,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 1164 flow [2023-11-23 22:35:16,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 1094 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-23 22:35:16,567 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 843 flow [2023-11-23 22:35:16,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2023-11-23 22:35:16,569 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2023-11-23 22:35:16,569 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 843 flow [2023-11-23 22:35:16,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:16,569 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] [2023-11-23 22:35:16,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 22:35:16,570 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:16,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1186944286, now seen corresponding path program 1 times [2023-11-23 22:35:16,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:16,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393005361] [2023-11-23 22:35:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:16,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393005361] [2023-11-23 22:35:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393005361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:16,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:16,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:35:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518595725] [2023-11-23 22:35:16,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:16,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:35:16,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:35:16,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:35:16,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-23 22:35:16,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:16,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-23 22:35:16,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:16,896 INFO L124 PetriNetUnfolderBase]: 375/740 cut-off events. [2023-11-23 22:35:16,896 INFO L125 PetriNetUnfolderBase]: For 2698/2747 co-relation queries the response was YES. [2023-11-23 22:35:16,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3019 conditions, 740 events. 375/740 cut-off events. For 2698/2747 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3716 event pairs, 169 based on Foata normal form. 25/756 useless extension candidates. Maximal degree in co-relation 2987. Up to 584 conditions per place. [2023-11-23 22:35:16,906 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 68 selfloop transitions, 2 changer transitions 11/107 dead transitions. [2023-11-23 22:35:16,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 1104 flow [2023-11-23 22:35:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:35:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:35:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2023-11-23 22:35:16,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-11-23 22:35:16,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2023-11-23 22:35:16,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2023-11-23 22:35:16,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:16,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2023-11-23 22:35:16,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,909 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,909 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 843 flow. Second operand 4 states and 51 transitions. [2023-11-23 22:35:16,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 1104 flow [2023-11-23 22:35:16,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 1088 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-23 22:35:16,951 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 847 flow [2023-11-23 22:35:16,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=847, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-11-23 22:35:16,952 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2023-11-23 22:35:16,952 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 847 flow [2023-11-23 22:35:16,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:16,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:16,953 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] [2023-11-23 22:35:16,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 22:35:16,953 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:16,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash 15225383, now seen corresponding path program 1 times [2023-11-23 22:35:16,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:16,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975011080] [2023-11-23 22:35:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:17,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:17,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975011080] [2023-11-23 22:35:17,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975011080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:17,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163140397] [2023-11-23 22:35:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:17,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:17,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:17,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:17,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:35:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:17,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:35:17,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:17,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:17,620 INFO L378 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 36 treesize of output 12 [2023-11-23 22:35:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:17,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163140397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:17,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:17,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-23 22:35:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964241700] [2023-11-23 22:35:17,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:35:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:35:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:35:17,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-23 22:35:17,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 847 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:17,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:17,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-23 22:35:17,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:18,248 INFO L124 PetriNetUnfolderBase]: 1122/2104 cut-off events. [2023-11-23 22:35:18,249 INFO L125 PetriNetUnfolderBase]: For 7102/7237 co-relation queries the response was YES. [2023-11-23 22:35:18,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8289 conditions, 2104 events. 1122/2104 cut-off events. For 7102/7237 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12817 event pairs, 146 based on Foata normal form. 48/2147 useless extension candidates. Maximal degree in co-relation 6846. Up to 544 conditions per place. [2023-11-23 22:35:18,277 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 229 selfloop transitions, 14 changer transitions 5/274 dead transitions. [2023-11-23 22:35:18,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 274 transitions, 2878 flow [2023-11-23 22:35:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:35:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 22:35:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2023-11-23 22:35:18,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2023-11-23 22:35:18,279 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 130 transitions. [2023-11-23 22:35:18,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 130 transitions. [2023-11-23 22:35:18,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:18,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 130 transitions. [2023-11-23 22:35:18,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,282 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,282 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 847 flow. Second operand 9 states and 130 transitions. [2023-11-23 22:35:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 274 transitions, 2878 flow [2023-11-23 22:35:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 274 transitions, 2862 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-23 22:35:18,313 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 956 flow [2023-11-23 22:35:18,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=956, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2023-11-23 22:35:18,314 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2023-11-23 22:35:18,314 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 956 flow [2023-11-23 22:35:18,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:18,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:18,315 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] [2023-11-23 22:35:18,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:18,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:35:18,536 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:18,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1468824017, now seen corresponding path program 2 times [2023-11-23 22:35:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:18,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652024577] [2023-11-23 22:35:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:18,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652024577] [2023-11-23 22:35:18,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652024577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616375748] [2023-11-23 22:35:18,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:35:18,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:18,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:18,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:18,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:35:19,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:35:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:19,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:35:19,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:19,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:19,143 INFO L378 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 36 treesize of output 12 [2023-11-23 22:35:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:35:19,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616375748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:19,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:19,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-11-23 22:35:19,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963752509] [2023-11-23 22:35:19,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:19,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:35:19,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:35:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:35:19,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-23 22:35:19,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 956 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:19,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:19,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-23 22:35:19,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:20,476 INFO L124 PetriNetUnfolderBase]: 2774/5218 cut-off events. [2023-11-23 22:35:20,478 INFO L125 PetriNetUnfolderBase]: For 18896/19112 co-relation queries the response was YES. [2023-11-23 22:35:20,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 5218 events. 2774/5218 cut-off events. For 18896/19112 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 37350 event pairs, 436 based on Foata normal form. 105/5317 useless extension candidates. Maximal degree in co-relation 16640. Up to 1717 conditions per place. [2023-11-23 22:35:20,541 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 229 selfloop transitions, 23 changer transitions 18/296 dead transitions. [2023-11-23 22:35:20,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 296 transitions, 3134 flow [2023-11-23 22:35:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:35:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:35:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2023-11-23 22:35:20,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2023-11-23 22:35:20,543 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 119 transitions. [2023-11-23 22:35:20,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 119 transitions. [2023-11-23 22:35:20,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:20,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 119 transitions. [2023-11-23 22:35:20,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:20,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:20,545 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:20,545 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 956 flow. Second operand 8 states and 119 transitions. [2023-11-23 22:35:20,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 296 transitions, 3134 flow [2023-11-23 22:35:20,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 296 transitions, 3086 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-11-23 22:35:20,621 INFO L231 Difference]: Finished difference. Result has 98 places, 127 transitions, 1144 flow [2023-11-23 22:35:20,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=98, PETRI_TRANSITIONS=127} [2023-11-23 22:35:20,622 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 71 predicate places. [2023-11-23 22:35:20,622 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 127 transitions, 1144 flow [2023-11-23 22:35:20,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:20,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:20,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:20,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:35:20,836 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:20,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash -985221754, now seen corresponding path program 3 times [2023-11-23 22:35:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683652824] [2023-11-23 22:35:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683652824] [2023-11-23 22:35:20,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683652824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92058951] [2023-11-23 22:35:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:35:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:20,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:21,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:35:21,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 22:35:21,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:21,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:35:21,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:21,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:21,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92058951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:21,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:21,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-23 22:35:21,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047163752] [2023-11-23 22:35:21,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:21,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:35:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:35:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:35:21,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:21,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 127 transitions, 1144 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:21,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:21,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:21,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:23,685 INFO L124 PetriNetUnfolderBase]: 5060/8499 cut-off events. [2023-11-23 22:35:23,685 INFO L125 PetriNetUnfolderBase]: For 25109/25109 co-relation queries the response was YES. [2023-11-23 22:35:23,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35057 conditions, 8499 events. 5060/8499 cut-off events. For 25109/25109 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 55954 event pairs, 224 based on Foata normal form. 260/8759 useless extension candidates. Maximal degree in co-relation 29567. Up to 1535 conditions per place. [2023-11-23 22:35:23,802 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 380 selfloop transitions, 123 changer transitions 8/512 dead transitions. [2023-11-23 22:35:23,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 512 transitions, 4893 flow [2023-11-23 22:35:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-23 22:35:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-23 22:35:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 294 transitions. [2023-11-23 22:35:23,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2023-11-23 22:35:23,807 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 294 transitions. [2023-11-23 22:35:23,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 294 transitions. [2023-11-23 22:35:23,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:23,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 294 transitions. [2023-11-23 22:35:23,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 10.137931034482758) internal successors, (294), 29 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:23,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 27.0) internal successors, (810), 30 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:23,816 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 27.0) internal successors, (810), 30 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:23,816 INFO L175 Difference]: Start difference. First operand has 98 places, 127 transitions, 1144 flow. Second operand 29 states and 294 transitions. [2023-11-23 22:35:23,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 512 transitions, 4893 flow [2023-11-23 22:35:23,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 512 transitions, 4842 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-23 22:35:23,929 INFO L231 Difference]: Finished difference. Result has 145 places, 205 transitions, 2211 flow [2023-11-23 22:35:23,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2211, PETRI_PLACES=145, PETRI_TRANSITIONS=205} [2023-11-23 22:35:23,930 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 118 predicate places. [2023-11-23 22:35:23,930 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 205 transitions, 2211 flow [2023-11-23 22:35:23,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:23,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:23,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:23,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:24,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:24,154 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:24,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash -234236438, now seen corresponding path program 4 times [2023-11-23 22:35:24,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:24,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539167554] [2023-11-23 22:35:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:24,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539167554] [2023-11-23 22:35:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539167554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196394887] [2023-11-23 22:35:24,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:35:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:24,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:24,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:35:24,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:35:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:24,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:35:24,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:24,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:24,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196394887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:24,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:24,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-23 22:35:24,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123157467] [2023-11-23 22:35:24,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:24,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 22:35:24,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 22:35:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:35:24,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:24,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 205 transitions, 2211 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:24,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:24,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:27,336 INFO L124 PetriNetUnfolderBase]: 7098/11920 cut-off events. [2023-11-23 22:35:27,336 INFO L125 PetriNetUnfolderBase]: For 80781/80781 co-relation queries the response was YES. [2023-11-23 22:35:27,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61884 conditions, 11920 events. 7098/11920 cut-off events. For 80781/80781 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 82050 event pairs, 357 based on Foata normal form. 88/12008 useless extension candidates. Maximal degree in co-relation 60013. Up to 2360 conditions per place. [2023-11-23 22:35:27,519 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 276 selfloop transitions, 178 changer transitions 9/464 dead transitions. [2023-11-23 22:35:27,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 464 transitions, 5339 flow [2023-11-23 22:35:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:35:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-23 22:35:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 158 transitions. [2023-11-23 22:35:27,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39012345679012345 [2023-11-23 22:35:27,521 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 158 transitions. [2023-11-23 22:35:27,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 158 transitions. [2023-11-23 22:35:27,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:27,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 158 transitions. [2023-11-23 22:35:27,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.533333333333333) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:27,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:27,524 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:27,524 INFO L175 Difference]: Start difference. First operand has 145 places, 205 transitions, 2211 flow. Second operand 15 states and 158 transitions. [2023-11-23 22:35:27,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 464 transitions, 5339 flow [2023-11-23 22:35:28,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 464 transitions, 5059 flow, removed 125 selfloop flow, removed 4 redundant places. [2023-11-23 22:35:28,630 INFO L231 Difference]: Finished difference. Result has 162 places, 285 transitions, 3402 flow [2023-11-23 22:35:28,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3402, PETRI_PLACES=162, PETRI_TRANSITIONS=285} [2023-11-23 22:35:28,631 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 135 predicate places. [2023-11-23 22:35:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 285 transitions, 3402 flow [2023-11-23 22:35:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:28,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:28,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:28,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:28,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:28,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:28,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash -469377738, now seen corresponding path program 5 times [2023-11-23 22:35:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:28,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251526210] [2023-11-23 22:35:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:28,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251526210] [2023-11-23 22:35:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251526210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798429708] [2023-11-23 22:35:28,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:35:28,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:28,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:28,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:35:29,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-23 22:35:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:29,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:35:29,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:29,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:29,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798429708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:29,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:29,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-23 22:35:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600952216] [2023-11-23 22:35:29,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:29,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:35:29,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:29,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:35:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:35:29,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:29,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 285 transitions, 3402 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:29,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:29,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:29,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:33,724 INFO L124 PetriNetUnfolderBase]: 9517/15961 cut-off events. [2023-11-23 22:35:33,724 INFO L125 PetriNetUnfolderBase]: For 146153/146153 co-relation queries the response was YES. [2023-11-23 22:35:33,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89037 conditions, 15961 events. 9517/15961 cut-off events. For 146153/146153 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 113244 event pairs, 427 based on Foata normal form. 178/16139 useless extension candidates. Maximal degree in co-relation 83382. Up to 3566 conditions per place. [2023-11-23 22:35:33,921 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 308 selfloop transitions, 245 changer transitions 6/560 dead transitions. [2023-11-23 22:35:33,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 560 transitions, 6979 flow [2023-11-23 22:35:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:35:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-23 22:35:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 173 transitions. [2023-11-23 22:35:33,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40046296296296297 [2023-11-23 22:35:33,923 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 173 transitions. [2023-11-23 22:35:33,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 173 transitions. [2023-11-23 22:35:33,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:33,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 173 transitions. [2023-11-23 22:35:33,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:33,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:33,934 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 27.0) internal successors, (459), 17 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:33,934 INFO L175 Difference]: Start difference. First operand has 162 places, 285 transitions, 3402 flow. Second operand 16 states and 173 transitions. [2023-11-23 22:35:33,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 560 transitions, 6979 flow [2023-11-23 22:35:36,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 560 transitions, 6817 flow, removed 81 selfloop flow, removed 0 redundant places. [2023-11-23 22:35:36,592 INFO L231 Difference]: Finished difference. Result has 187 places, 364 transitions, 5092 flow [2023-11-23 22:35:36,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3308, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5092, PETRI_PLACES=187, PETRI_TRANSITIONS=364} [2023-11-23 22:35:36,593 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 160 predicate places. [2023-11-23 22:35:36,593 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 364 transitions, 5092 flow [2023-11-23 22:35:36,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:36,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:36,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:36,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 22:35:36,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:36,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:36,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:36,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1015738034, now seen corresponding path program 6 times [2023-11-23 22:35:36,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:36,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582425816] [2023-11-23 22:35:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:36,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:36,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:36,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582425816] [2023-11-23 22:35:36,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582425816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:36,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306561031] [2023-11-23 22:35:36,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:35:36,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:36,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:36,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:35:37,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-23 22:35:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:35:37,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:35:37,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:37,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:37,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306561031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:37,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:37,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-23 22:35:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850083397] [2023-11-23 22:35:37,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:37,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:35:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:35:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:35:37,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:37,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 364 transitions, 5092 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:37,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:37,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:37,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:42,870 INFO L124 PetriNetUnfolderBase]: 11664/19576 cut-off events. [2023-11-23 22:35:42,871 INFO L125 PetriNetUnfolderBase]: For 258739/258739 co-relation queries the response was YES. [2023-11-23 22:35:43,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122931 conditions, 19576 events. 11664/19576 cut-off events. For 258739/258739 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 143758 event pairs, 563 based on Foata normal form. 136/19712 useless extension candidates. Maximal degree in co-relation 120057. Up to 3254 conditions per place. [2023-11-23 22:35:43,220 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 433 selfloop transitions, 321 changer transitions 4/759 dead transitions. [2023-11-23 22:35:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 759 transitions, 10474 flow [2023-11-23 22:35:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 22:35:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-23 22:35:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 264 transitions. [2023-11-23 22:35:43,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2023-11-23 22:35:43,224 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 264 transitions. [2023-11-23 22:35:43,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 264 transitions. [2023-11-23 22:35:43,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:43,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 264 transitions. [2023-11-23 22:35:43,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 10.153846153846153) internal successors, (264), 26 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:43,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 27.0) internal successors, (729), 27 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:43,228 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 27.0) internal successors, (729), 27 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:43,228 INFO L175 Difference]: Start difference. First operand has 187 places, 364 transitions, 5092 flow. Second operand 26 states and 264 transitions. [2023-11-23 22:35:43,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 759 transitions, 10474 flow [2023-11-23 22:35:49,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 759 transitions, 10353 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-23 22:35:49,759 INFO L231 Difference]: Finished difference. Result has 223 places, 450 transitions, 7511 flow [2023-11-23 22:35:49,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7511, PETRI_PLACES=223, PETRI_TRANSITIONS=450} [2023-11-23 22:35:49,760 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 196 predicate places. [2023-11-23 22:35:49,761 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 450 transitions, 7511 flow [2023-11-23 22:35:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:49,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:49,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:49,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:35:49,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:49,974 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:35:49,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash -787515612, now seen corresponding path program 7 times [2023-11-23 22:35:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:49,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644164195] [2023-11-23 22:35:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:50,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:50,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644164195] [2023-11-23 22:35:50,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644164195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:35:50,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743542170] [2023-11-23 22:35:50,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:35:50,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:35:50,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:50,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:35:50,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7302ac4-8e5c-4df7-a607-1366ec9eff84/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:35:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:50,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:35:50,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:35:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:50,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:35:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:35:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743542170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:35:50,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:35:50,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-23 22:35:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584654443] [2023-11-23 22:35:50,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:35:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:35:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:35:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:35:50,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2023-11-23 22:35:50,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 450 transitions, 7511 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:50,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:50,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2023-11-23 22:35:50,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:56,810 INFO L124 PetriNetUnfolderBase]: 11697/19675 cut-off events. [2023-11-23 22:35:56,810 INFO L125 PetriNetUnfolderBase]: For 384992/384992 co-relation queries the response was YES. [2023-11-23 22:35:57,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142609 conditions, 19675 events. 11697/19675 cut-off events. For 384992/384992 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 145899 event pairs, 1484 based on Foata normal form. 34/19709 useless extension candidates. Maximal degree in co-relation 139539. Up to 6435 conditions per place. [2023-11-23 22:35:57,109 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 438 selfloop transitions, 209 changer transitions 9/657 dead transitions. [2023-11-23 22:35:57,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 657 transitions, 10803 flow [2023-11-23 22:35:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:35:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-23 22:35:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2023-11-23 22:35:57,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2023-11-23 22:35:57,111 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 147 transitions. [2023-11-23 22:35:57,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 147 transitions. [2023-11-23 22:35:57,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:57,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 147 transitions. [2023-11-23 22:35:57,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:57,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:57,113 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:35:57,113 INFO L175 Difference]: Start difference. First operand has 223 places, 450 transitions, 7511 flow. Second operand 13 states and 147 transitions. [2023-11-23 22:35:57,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 657 transitions, 10803 flow