./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.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_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/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_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/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_5252467b-337b-4e44-9d51-0d5374d01882/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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:30:44,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:30:44,971 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:30:44,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:30:44,981 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:30:45,021 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:30:45,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:30:45,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:30:45,024 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:30:45,029 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:30:45,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:30:45,030 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:30:45,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:30:45,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:30:45,034 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:30:45,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:30:45,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:30:45,036 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:30:45,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:30:45,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:30:45,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:30:45,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:30:45,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:30:45,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:30:45,041 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:30:45,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:30:45,042 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:30:45,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:30:45,043 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:30:45,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:30:45,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:30:45,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:30:45,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:30:45,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:30:45,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:30:45,047 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:30:45,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:30:45,047 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:30:45,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:30:45,048 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:30:45,048 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:30:45,048 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:30:45,049 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_5252467b-337b-4e44-9d51-0d5374d01882/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-11-23 22:30:45,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:30:45,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:30:45,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:30:45,377 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:30:45,378 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:30:45,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-23 22:30:48,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:30:48,744 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:30:48,745 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-11-23 22:30:48,755 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/data/c45dd5730/294f88d4f67a4e448f09dac793803be1/FLAG2bf493a19 [2023-11-23 22:30:48,773 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/data/c45dd5730/294f88d4f67a4e448f09dac793803be1 [2023-11-23 22:30:48,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:30:48,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:30:48,778 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:30:48,778 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:30:48,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:30:48,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:30:48" (1/1) ... [2023-11-23 22:30:48,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d59baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:48, skipping insertion in model container [2023-11-23 22:30:48,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:30:48" (1/1) ... [2023-11-23 22:30:48,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:30:49,048 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_5252467b-337b-4e44-9d51-0d5374d01882/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-23 22:30:49,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:30:49,068 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:30:49,096 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_5252467b-337b-4e44-9d51-0d5374d01882/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-11-23 22:30:49,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:30:49,117 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:30:49,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49 WrapperNode [2023-11-23 22:30:49,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:30:49,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:30:49,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:30:49,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:30:49,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,169 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2023-11-23 22:30:49,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:30:49,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:30:49,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:30:49,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:30:49,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,189 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,206 INFO L189 HeapSplitter]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2] [2023-11-23 22:30:49,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:30:49,236 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:30:49,236 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:30:49,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:30:49,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (1/1) ... [2023-11-23 22:30:49,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:30:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:49,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:30:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:30:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:30:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:30:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:30:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:30:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:30:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:30:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:30:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:30:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:30:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:30:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:30:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:30:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:30:49,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:30:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:30:49,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:30:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:30:49,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:30:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:30:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:30:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:30:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:30:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:30:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:30:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:30:49,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:30:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:30:49,325 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 22:30:49,472 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:30:49,475 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:30:49,998 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:30:50,586 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:30:50,586 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 22:30:50,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:30:50 BoogieIcfgContainer [2023-11-23 22:30:50,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:30:50,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:30:50,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:30:50,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:30:50,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:30:48" (1/3) ... [2023-11-23 22:30:50,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d77c968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:30:50, skipping insertion in model container [2023-11-23 22:30:50,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:49" (2/3) ... [2023-11-23 22:30:50,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d77c968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:30:50, skipping insertion in model container [2023-11-23 22:30:50,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:30:50" (3/3) ... [2023-11-23 22:30:50,600 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-23 22:30:50,611 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:30:50,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:30:50,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:30:50,623 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:30:50,721 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:30:50,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-23 22:30:50,831 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-23 22:30:50,831 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:30:50,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-23 22:30:50,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-23 22:30:50,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-23 22:30:50,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:30:50,877 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;@21adabb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:30:50,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:30:50,897 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:30:50,897 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2023-11-23 22:30:50,898 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:30:50,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:50,899 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 22:30:50,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:50,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash 552748514, now seen corresponding path program 1 times [2023-11-23 22:30:50,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:50,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35478316] [2023-11-23 22:30:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:50,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:51,548 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 22:30:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35478316] [2023-11-23 22:30:51,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35478316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:51,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:51,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:30:51,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143061291] [2023-11-23 22:30:51,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:30:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:30:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:30:51,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:51,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 22:30:51,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:51,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:51,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:51,899 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2023-11-23 22:30:51,900 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-23 22:30:51,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2023-11-23 22:30:51,911 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-11-23 22:30:51,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2023-11-23 22:30:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:30:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:30:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-23 22:30:51,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2023-11-23 22:30:51,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-23 22:30:51,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-23 22:30:51,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:51,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-23 22:30:51,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 22:30:51,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 22:30:51,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 22:30:51,945 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2023-11-23 22:30:51,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2023-11-23 22:30:51,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:30:51,954 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2023-11-23 22:30:51,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2023-11-23 22:30:51,967 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-23 22:30:51,967 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2023-11-23 22:30:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 22:30:51,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:51,968 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, 1, 1] [2023-11-23 22:30:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:30:51,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:51,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -724749522, now seen corresponding path program 1 times [2023-11-23 22:30:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:51,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041468787] [2023-11-23 22:30:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:30:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041468787] [2023-11-23 22:30:52,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041468787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:52,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:52,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:30:52,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662177417] [2023-11-23 22:30:52,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:30:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:30:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:30:52,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:52,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 22:30:52,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:52,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:52,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:52,631 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2023-11-23 22:30:52,631 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-23 22:30:52,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 506 events. 341/506 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1386 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1010. Up to 335 conditions per place. [2023-11-23 22:30:52,637 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 41 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-11-23 22:30:52,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 217 flow [2023-11-23 22:30:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:30:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:30:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-23 22:30:52,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-23 22:30:52,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-23 22:30:52,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-23 22:30:52,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:52,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-23 22:30:52,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 22:30:52,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 22:30:52,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 22:30:52,642 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 3 states and 55 transitions. [2023-11-23 22:30:52,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 217 flow [2023-11-23 22:30:52,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:30:52,645 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 102 flow [2023-11-23 22:30:52,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-11-23 22:30:52,647 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-11-23 22:30:52,647 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 102 flow [2023-11-23 22:30:52,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 22:30:52,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:52,648 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, 1, 1, 1] [2023-11-23 22:30:52,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:30:52,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:52,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1297276284, now seen corresponding path program 1 times [2023-11-23 22:30:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:52,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577858933] [2023-11-23 22:30:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:52,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:30:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577858933] [2023-11-23 22:30:52,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577858933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:30:52,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957186597] [2023-11-23 22:30:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:52,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:52,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:52,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:30:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:53,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:30:53,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:30:53,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:30:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:30:53,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957186597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:30:53,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:30:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-23 22:30:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400184222] [2023-11-23 22:30:53,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:30:53,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:30:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:30:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:30:53,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:53,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 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 22:30:53,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:53,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:53,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:53,412 INFO L124 PetriNetUnfolderBase]: 341/515 cut-off events. [2023-11-23 22:30:53,412 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-23 22:30:53,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 515 events. 341/515 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1353 event pairs, 228 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 1109. Up to 503 conditions per place. [2023-11-23 22:30:53,417 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 26 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-11-23 22:30:53,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 220 flow [2023-11-23 22:30:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:30:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:30:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-23 22:30:53,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2023-11-23 22:30:53,420 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-23 22:30:53,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-23 22:30:53,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:53,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-23 22:30:53,422 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 22:30:53,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 22:30:53,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 22:30:53,423 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 102 flow. Second operand 6 states and 73 transitions. [2023-11-23 22:30:53,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 220 flow [2023-11-23 22:30:53,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:30:53,427 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 196 flow [2023-11-23 22:30:53,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2023-11-23 22:30:53,428 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-23 22:30:53,428 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 196 flow [2023-11-23 22:30:53,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 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 22:30:53,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:53,429 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 22:30:53,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:53,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:53,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1716219622, now seen corresponding path program 2 times [2023-11-23 22:30:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320061535] [2023-11-23 22:30:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 22:30:54,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320061535] [2023-11-23 22:30:54,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320061535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:30:54,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482216056] [2023-11-23 22:30:54,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:30:54,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:54,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:54,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:54,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:30:54,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:30:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:30:54,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:30:54,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 22:30:54,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:30:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482216056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:54,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:30:54,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-23 22:30:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727741934] [2023-11-23 22:30:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:54,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:30:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:30:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:30:54,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:54,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 22:30:54,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:54,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:54,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:54,663 INFO L124 PetriNetUnfolderBase]: 567/861 cut-off events. [2023-11-23 22:30:54,663 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-23 22:30:54,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 861 events. 567/861 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2926 event pairs, 228 based on Foata normal form. 22/725 useless extension candidates. Maximal degree in co-relation 1849. Up to 515 conditions per place. [2023-11-23 22:30:54,695 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 67 selfloop transitions, 3 changer transitions 2/73 dead transitions. [2023-11-23 22:30:54,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 423 flow [2023-11-23 22:30:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:30:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:30:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-23 22:30:54,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2023-11-23 22:30:54,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-23 22:30:54,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-23 22:30:54,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:54,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-23 22:30:54,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 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 22:30:54,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 22:30:54,714 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 22:30:54,714 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 196 flow. Second operand 4 states and 74 transitions. [2023-11-23 22:30:54,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 423 flow [2023-11-23 22:30:54,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 399 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-23 22:30:54,722 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 192 flow [2023-11-23 22:30:54,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-23 22:30:54,724 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-11-23 22:30:54,725 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 192 flow [2023-11-23 22:30:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 22:30:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 22:30:54,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:54,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:54,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:54,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1266254996, now seen corresponding path program 3 times [2023-11-23 22:30:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:54,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932266665] [2023-11-23 22:30:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:54,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 22:30:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:55,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932266665] [2023-11-23 22:30:55,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932266665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:30:55,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347396025] [2023-11-23 22:30:55,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:30:55,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:55,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:55,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:30:55,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 22:30:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:30:55,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:30:55,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 22:30:55,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:30:55,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347396025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:55,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:30:55,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-23 22:30:55,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397614188] [2023-11-23 22:30:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:55,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:30:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:30:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:30:55,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:55,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 22:30:55,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:55,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:55,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:55,800 INFO L124 PetriNetUnfolderBase]: 625/943 cut-off events. [2023-11-23 22:30:55,800 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-23 22:30:55,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 943 events. 625/943 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3365 event pairs, 110 based on Foata normal form. 24/835 useless extension candidates. Maximal degree in co-relation 2399. Up to 652 conditions per place. [2023-11-23 22:30:55,810 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 61 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2023-11-23 22:30:55,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 406 flow [2023-11-23 22:30:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:30:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:30:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-23 22:30:55,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-23 22:30:55,813 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-23 22:30:55,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-23 22:30:55,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:55,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-23 22:30:55,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 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 22:30:55,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 22:30:55,816 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 22:30:55,816 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 192 flow. Second operand 4 states and 65 transitions. [2023-11-23 22:30:55,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 406 flow [2023-11-23 22:30:55,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-23 22:30:55,822 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 217 flow [2023-11-23 22:30:55,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-11-23 22:30:55,823 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2023-11-23 22:30:55,823 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 217 flow [2023-11-23 22:30:55,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 22:30:55,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:55,824 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 22:30:55,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:56,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:56,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:56,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 707335756, now seen corresponding path program 4 times [2023-11-23 22:30:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:56,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949361564] [2023-11-23 22:30:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 22:30:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949361564] [2023-11-23 22:30:56,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949361564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:30:56,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926638908] [2023-11-23 22:30:56,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:30:56,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:56,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:56,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:30:56,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:30:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:30:56,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:30:56,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 22:30:56,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:30:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 22:30:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926638908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:30:56,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:30:56,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-23 22:30:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685484670] [2023-11-23 22:30:56,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:30:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:30:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:30:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:30:56,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:56,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 217 flow. Second operand has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 22:30:56,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:56,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:56,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:57,150 INFO L124 PetriNetUnfolderBase]: 625/946 cut-off events. [2023-11-23 22:30:57,150 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2023-11-23 22:30:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2616 conditions, 946 events. 625/946 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3105 event pairs, 418 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 2521. Up to 930 conditions per place. [2023-11-23 22:30:57,159 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-11-23 22:30:57,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 331 flow [2023-11-23 22:30:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:30:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:30:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-23 22:30:57,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2023-11-23 22:30:57,161 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-23 22:30:57,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-23 22:30:57,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:57,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-23 22:30:57,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 22:30:57,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 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 22:30:57,163 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 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 22:30:57,163 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 217 flow. Second operand 7 states and 74 transitions. [2023-11-23 22:30:57,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 331 flow [2023-11-23 22:30:57,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:30:57,169 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 282 flow [2023-11-23 22:30:57,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-23 22:30:57,170 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2023-11-23 22:30:57,171 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 282 flow [2023-11-23 22:30:57,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 22:30:57,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:57,171 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 22:30:57,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:57,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1838598006, now seen corresponding path program 5 times [2023-11-23 22:30:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70529577] [2023-11-23 22:30:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:30:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70529577] [2023-11-23 22:30:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70529577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:57,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:30:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402654534] [2023-11-23 22:30:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:57,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:30:57,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:30:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:30:57,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:57,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 22:30:57,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:57,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:58,395 INFO L124 PetriNetUnfolderBase]: 1105/1680 cut-off events. [2023-11-23 22:30:58,396 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2023-11-23 22:30:58,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1680 events. 1105/1680 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6976 event pairs, 406 based on Foata normal form. 20/1450 useless extension candidates. Maximal degree in co-relation 4422. Up to 979 conditions per place. [2023-11-23 22:30:58,411 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 78 selfloop transitions, 3 changer transitions 16/98 dead transitions. [2023-11-23 22:30:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 98 transitions, 663 flow [2023-11-23 22:30:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:30:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:30:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2023-11-23 22:30:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2023-11-23 22:30:58,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2023-11-23 22:30:58,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2023-11-23 22:30:58,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:58,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2023-11-23 22:30:58,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 22:30:58,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:30:58,415 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:30:58,416 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 282 flow. Second operand 5 states and 87 transitions. [2023-11-23 22:30:58,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 98 transitions, 663 flow [2023-11-23 22:30:58,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 627 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-23 22:30:58,422 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 268 flow [2023-11-23 22:30:58,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-23 22:30:58,423 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2023-11-23 22:30:58,424 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 268 flow [2023-11-23 22:30:58,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 22:30:58,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:58,424 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 22:30:58,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:30:58,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:58,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:58,425 INFO L85 PathProgramCache]: Analyzing trace with hash -80311858, now seen corresponding path program 6 times [2023-11-23 22:30:58,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:58,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102175857] [2023-11-23 22:30:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:58,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:30:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102175857] [2023-11-23 22:30:58,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102175857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:58,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:58,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:30:58,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072006020] [2023-11-23 22:30:58,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:58,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:30:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:30:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:30:58,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:58,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 22:30:58,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:58,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:58,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:59,146 INFO L124 PetriNetUnfolderBase]: 843/1260 cut-off events. [2023-11-23 22:30:59,146 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2023-11-23 22:30:59,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 1260 events. 843/1260 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4674 event pairs, 352 based on Foata normal form. 48/1176 useless extension candidates. Maximal degree in co-relation 3912. Up to 885 conditions per place. [2023-11-23 22:30:59,158 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 69 selfloop transitions, 6 changer transitions 3/79 dead transitions. [2023-11-23 22:30:59,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 535 flow [2023-11-23 22:30:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:30:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:30:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-23 22:30:59,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-23 22:30:59,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-23 22:30:59,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-23 22:30:59,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:59,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-23 22:30:59,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 22:30:59,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 22:30:59,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 22:30:59,162 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 268 flow. Second operand 4 states and 69 transitions. [2023-11-23 22:30:59,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 535 flow [2023-11-23 22:30:59,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 518 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-23 22:30:59,170 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 285 flow [2023-11-23 22:30:59,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-23 22:30:59,173 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2023-11-23 22:30:59,173 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 285 flow [2023-11-23 22:30:59,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 22:30:59,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:59,174 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 22:30:59,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:30:59,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:30:59,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash -897593779, now seen corresponding path program 1 times [2023-11-23 22:30:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:59,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477178734] [2023-11-23 22:30:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:30:59,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477178734] [2023-11-23 22:30:59,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477178734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:59,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:59,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:30:59,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911525701] [2023-11-23 22:30:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:59,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:30:59,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:59,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:30:59,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:30:59,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:30:59,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:30:59,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:59,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:30:59,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:00,037 INFO L124 PetriNetUnfolderBase]: 920/1366 cut-off events. [2023-11-23 22:31:00,037 INFO L125 PetriNetUnfolderBase]: For 2281/2281 co-relation queries the response was YES. [2023-11-23 22:31:00,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1366 events. 920/1366 cut-off events. For 2281/2281 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5167 event pairs, 293 based on Foata normal form. 14/1240 useless extension candidates. Maximal degree in co-relation 4318. Up to 763 conditions per place. [2023-11-23 22:31:00,053 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 73 selfloop transitions, 6 changer transitions 14/94 dead transitions. [2023-11-23 22:31:00,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 651 flow [2023-11-23 22:31:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:31:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:31:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2023-11-23 22:31:00,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2023-11-23 22:31:00,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 86 transitions. [2023-11-23 22:31:00,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 86 transitions. [2023-11-23 22:31:00,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:00,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 86 transitions. [2023-11-23 22:31:00,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 22:31:00,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:00,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:00,060 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 285 flow. Second operand 5 states and 86 transitions. [2023-11-23 22:31:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 651 flow [2023-11-23 22:31:00,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 611 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-23 22:31:00,069 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 309 flow [2023-11-23 22:31:00,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-23 22:31:00,071 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-11-23 22:31:00,072 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 309 flow [2023-11-23 22:31:00,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:00,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:00,072 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 22:31:00,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:31:00,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash 208249095, now seen corresponding path program 2 times [2023-11-23 22:31:00,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:00,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518141833] [2023-11-23 22:31:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:00,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:00,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518141833] [2023-11-23 22:31:00,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518141833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:00,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791624754] [2023-11-23 22:31:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:31:00,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:00,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:00,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:31:00,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:31:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:00,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:31:00,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:00,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:00,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791624754] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:00,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:31:00,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-11-23 22:31:00,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811995128] [2023-11-23 22:31:00,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:00,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:31:00,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:31:00,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:31:00,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:00,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:00,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:00,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:00,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:01,338 INFO L124 PetriNetUnfolderBase]: 930/1371 cut-off events. [2023-11-23 22:31:01,339 INFO L125 PetriNetUnfolderBase]: For 2500/2500 co-relation queries the response was YES. [2023-11-23 22:31:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 1371 events. 930/1371 cut-off events. For 2500/2500 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4972 event pairs, 155 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 4554. Up to 515 conditions per place. [2023-11-23 22:31:01,354 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 91 selfloop transitions, 9 changer transitions 3/104 dead transitions. [2023-11-23 22:31:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 752 flow [2023-11-23 22:31:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:31:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:31:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-23 22:31:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-23 22:31:01,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-23 22:31:01,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-23 22:31:01,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:01,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-23 22:31:01,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 22:31:01,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:01,358 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:01,359 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 309 flow. Second operand 5 states and 83 transitions. [2023-11-23 22:31:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 752 flow [2023-11-23 22:31:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 737 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:01,373 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 362 flow [2023-11-23 22:31:01,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-23 22:31:01,375 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2023-11-23 22:31:01,375 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 362 flow [2023-11-23 22:31:01,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:01,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:01,376 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 22:31:01,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:01,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -36227667, now seen corresponding path program 3 times [2023-11-23 22:31:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537141738] [2023-11-23 22:31:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537141738] [2023-11-23 22:31:01,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537141738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948193549] [2023-11-23 22:31:01,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:31:01,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:01,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:02,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:31:02,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 22:31:02,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:02,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:31:02,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:02,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:02,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948193549] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:02,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:31:02,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-23 22:31:02,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495495547] [2023-11-23 22:31:02,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:02,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:31:02,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:02,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:31:02,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:31:02,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:02,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:02,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:02,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:02,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:02,868 INFO L124 PetriNetUnfolderBase]: 988/1453 cut-off events. [2023-11-23 22:31:02,868 INFO L125 PetriNetUnfolderBase]: For 3293/3293 co-relation queries the response was YES. [2023-11-23 22:31:02,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5089 conditions, 1453 events. 988/1453 cut-off events. For 3293/3293 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5412 event pairs, 301 based on Foata normal form. 24/1333 useless extension candidates. Maximal degree in co-relation 4984. Up to 811 conditions per place. [2023-11-23 22:31:02,884 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 83 selfloop transitions, 10 changer transitions 1/95 dead transitions. [2023-11-23 22:31:02,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 695 flow [2023-11-23 22:31:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:31:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:31:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-23 22:31:02,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-11-23 22:31:02,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-23 22:31:02,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-23 22:31:02,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:02,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-23 22:31:02,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 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 22:31:02,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:02,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:02,888 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 362 flow. Second operand 5 states and 84 transitions. [2023-11-23 22:31:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 695 flow [2023-11-23 22:31:02,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:02,901 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 384 flow [2023-11-23 22:31:02,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-23 22:31:02,902 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2023-11-23 22:31:02,902 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 384 flow [2023-11-23 22:31:02,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:02,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:02,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 22:31:02,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 22:31:03,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:03,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:03,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1473161755, now seen corresponding path program 4 times [2023-11-23 22:31:03,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211520395] [2023-11-23 22:31:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:03,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211520395] [2023-11-23 22:31:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211520395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:03,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:03,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:31:03,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408506486] [2023-11-23 22:31:03,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:03,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:31:03,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:31:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:31:03,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:03,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:03,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:03,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:03,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:03,876 INFO L124 PetriNetUnfolderBase]: 974/1439 cut-off events. [2023-11-23 22:31:03,876 INFO L125 PetriNetUnfolderBase]: For 3823/3823 co-relation queries the response was YES. [2023-11-23 22:31:03,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1439 events. 974/1439 cut-off events. For 3823/3823 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5343 event pairs, 315 based on Foata normal form. 14/1309 useless extension candidates. Maximal degree in co-relation 5183. Up to 968 conditions per place. [2023-11-23 22:31:03,892 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 8 changer transitions 16/101 dead transitions. [2023-11-23 22:31:03,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 782 flow [2023-11-23 22:31:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:31:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:31:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-23 22:31:03,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-11-23 22:31:03,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-23 22:31:03,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-23 22:31:03,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:03,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-23 22:31:03,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 22:31:03,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:03,896 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:03,896 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 384 flow. Second operand 5 states and 83 transitions. [2023-11-23 22:31:03,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 782 flow [2023-11-23 22:31:03,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 754 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-23 22:31:03,914 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 436 flow [2023-11-23 22:31:03,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-23 22:31:03,916 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2023-11-23 22:31:03,916 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 436 flow [2023-11-23 22:31:03,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:03,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:03,917 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 22:31:03,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:31:03,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:03,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1593966465, now seen corresponding path program 5 times [2023-11-23 22:31:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:03,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706885596] [2023-11-23 22:31:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 22:31:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:04,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706885596] [2023-11-23 22:31:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706885596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:31:04,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:31:04,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:31:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419863350] [2023-11-23 22:31:04,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:31:04,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:31:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:31:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:31:04,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:04,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:04,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:04,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:04,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:04,649 INFO L124 PetriNetUnfolderBase]: 864/1269 cut-off events. [2023-11-23 22:31:04,650 INFO L125 PetriNetUnfolderBase]: For 3726/3726 co-relation queries the response was YES. [2023-11-23 22:31:04,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 1269 events. 864/1269 cut-off events. For 3726/3726 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4507 event pairs, 259 based on Foata normal form. 24/1157 useless extension candidates. Maximal degree in co-relation 4619. Up to 806 conditions per place. [2023-11-23 22:31:04,665 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 9 changer transitions 4/99 dead transitions. [2023-11-23 22:31:04,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 777 flow [2023-11-23 22:31:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:31:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:31:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2023-11-23 22:31:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-23 22:31:04,667 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2023-11-23 22:31:04,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2023-11-23 22:31:04,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:04,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2023-11-23 22:31:04,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 22:31:04,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:04,669 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 22:31:04,669 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 436 flow. Second operand 5 states and 81 transitions. [2023-11-23 22:31:04,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 777 flow [2023-11-23 22:31:04,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 759 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:04,685 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 434 flow [2023-11-23 22:31:04,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-23 22:31:04,686 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-11-23 22:31:04,686 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 434 flow [2023-11-23 22:31:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 22:31:04,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:04,687 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 22:31:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:31:04,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:04,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash -617366413, now seen corresponding path program 1 times [2023-11-23 22:31:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884522984] [2023-11-23 22:31:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:06,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:06,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884522984] [2023-11-23 22:31:06,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884522984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:06,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586468871] [2023-11-23 22:31:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:06,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:06,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:06,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:31:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:06,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 22:31:06,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:06,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:31:06,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2023-11-23 22:31:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:07,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:07,622 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-23 22:31:07,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-23 22:31:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:07,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586468871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:07,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:07,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2023-11-23 22:31:07,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076998412] [2023-11-23 22:31:07,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:07,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 22:31:07,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 22:31:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-23 22:31:07,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:07,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 434 flow. Second operand has 27 states, 27 states have (on average 6.444444444444445) internal successors, (174), 27 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 22:31:07,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:07,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:07,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:10,364 INFO L124 PetriNetUnfolderBase]: 1997/2916 cut-off events. [2023-11-23 22:31:10,365 INFO L125 PetriNetUnfolderBase]: For 6854/6854 co-relation queries the response was YES. [2023-11-23 22:31:10,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 2916 events. 1997/2916 cut-off events. For 6854/6854 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12828 event pairs, 166 based on Foata normal form. 1/2499 useless extension candidates. Maximal degree in co-relation 10302. Up to 928 conditions per place. [2023-11-23 22:31:10,399 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 65 changer transitions 9/232 dead transitions. [2023-11-23 22:31:10,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 232 transitions, 1809 flow [2023-11-23 22:31:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:31:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-23 22:31:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2023-11-23 22:31:10,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41354723707664887 [2023-11-23 22:31:10,401 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 232 transitions. [2023-11-23 22:31:10,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 232 transitions. [2023-11-23 22:31:10,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:10,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 232 transitions. [2023-11-23 22:31:10,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 13.647058823529411) internal successors, (232), 17 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 22:31:10,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 22:31:10,405 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 22:31:10,405 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 434 flow. Second operand 17 states and 232 transitions. [2023-11-23 22:31:10,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 232 transitions, 1809 flow [2023-11-23 22:31:10,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 232 transitions, 1657 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-23 22:31:10,434 INFO L231 Difference]: Finished difference. Result has 88 places, 124 transitions, 1078 flow [2023-11-23 22:31:10,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1078, PETRI_PLACES=88, PETRI_TRANSITIONS=124} [2023-11-23 22:31:10,435 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2023-11-23 22:31:10,435 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 124 transitions, 1078 flow [2023-11-23 22:31:10,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.444444444444445) internal successors, (174), 27 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 22:31:10,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:10,436 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 22:31:10,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:31:10,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:10,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1347741755, now seen corresponding path program 2 times [2023-11-23 22:31:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:10,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198386256] [2023-11-23 22:31:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:10,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198386256] [2023-11-23 22:31:12,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198386256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30498571] [2023-11-23 22:31:12,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:31:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:12,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:31:12,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:31:12,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:12,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 22:31:12,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:13,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:31:13,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-23 22:31:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:13,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:13,929 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-23 22:31:13,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-23 22:31:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30498571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:14,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:14,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2023-11-23 22:31:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973160439] [2023-11-23 22:31:14,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 22:31:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 22:31:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-23 22:31:14,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:14,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 124 transitions, 1078 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 22:31:14,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:14,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:14,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:16,714 INFO L124 PetriNetUnfolderBase]: 2325/3396 cut-off events. [2023-11-23 22:31:16,715 INFO L125 PetriNetUnfolderBase]: For 11686/11686 co-relation queries the response was YES. [2023-11-23 22:31:16,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 3396 events. 2325/3396 cut-off events. For 11686/11686 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15366 event pairs, 244 based on Foata normal form. 1/3397 useless extension candidates. Maximal degree in co-relation 13674. Up to 1135 conditions per place. [2023-11-23 22:31:16,756 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 160 selfloop transitions, 81 changer transitions 46/288 dead transitions. [2023-11-23 22:31:16,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 288 transitions, 2445 flow [2023-11-23 22:31:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 22:31:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-23 22:31:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 283 transitions. [2023-11-23 22:31:16,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2023-11-23 22:31:16,759 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 283 transitions. [2023-11-23 22:31:16,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 283 transitions. [2023-11-23 22:31:16,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:16,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 283 transitions. [2023-11-23 22:31:16,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 13.476190476190476) internal successors, (283), 21 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 22:31:16,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 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 22:31:16,764 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 33.0) internal successors, (726), 22 states have internal predecessors, (726), 0 states have call successors, (0), 0 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 22:31:16,764 INFO L175 Difference]: Start difference. First operand has 88 places, 124 transitions, 1078 flow. Second operand 21 states and 283 transitions. [2023-11-23 22:31:16,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 288 transitions, 2445 flow [2023-11-23 22:31:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 288 transitions, 2402 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-23 22:31:16,849 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1461 flow [2023-11-23 22:31:16,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1461, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2023-11-23 22:31:16,852 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 81 predicate places. [2023-11-23 22:31:16,852 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1461 flow [2023-11-23 22:31:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 22:31:16,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:16,853 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 22:31:16,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 22:31:17,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:31:17,057 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:17,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1280045217, now seen corresponding path program 3 times [2023-11-23 22:31:17,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:17,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807899539] [2023-11-23 22:31:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:17,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:18,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807899539] [2023-11-23 22:31:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807899539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:18,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653662144] [2023-11-23 22:31:18,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:31:18,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:18,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:18,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:31:18,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 22:31:18,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:18,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 22:31:18,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:19,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:31:19,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-23 22:31:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:19,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:19,683 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-23 22:31:19,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-23 22:31:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:19,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653662144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:19,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:19,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2023-11-23 22:31:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725235723] [2023-11-23 22:31:19,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 22:31:19,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:19,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 22:31:19,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-11-23 22:31:19,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:19,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1461 flow. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 22:31:19,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:19,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:19,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:22,134 INFO L124 PetriNetUnfolderBase]: 2080/3047 cut-off events. [2023-11-23 22:31:22,134 INFO L125 PetriNetUnfolderBase]: For 22830/22830 co-relation queries the response was YES. [2023-11-23 22:31:22,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16511 conditions, 3047 events. 2080/3047 cut-off events. For 22830/22830 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13463 event pairs, 331 based on Foata normal form. 1/3048 useless extension candidates. Maximal degree in co-relation 16386. Up to 1182 conditions per place. [2023-11-23 22:31:22,170 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 75 changer transitions 3/236 dead transitions. [2023-11-23 22:31:22,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 236 transitions, 2434 flow [2023-11-23 22:31:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:31:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-23 22:31:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 206 transitions. [2023-11-23 22:31:22,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2023-11-23 22:31:22,173 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 206 transitions. [2023-11-23 22:31:22,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 206 transitions. [2023-11-23 22:31:22,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:22,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 206 transitions. [2023-11-23 22:31:22,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 12.875) internal successors, (206), 16 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 22:31:22,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 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 22:31:22,176 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 33.0) internal successors, (561), 17 states have internal predecessors, (561), 0 states have call successors, (0), 0 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 22:31:22,177 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1461 flow. Second operand 16 states and 206 transitions. [2023-11-23 22:31:22,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 236 transitions, 2434 flow [2023-11-23 22:31:22,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 236 transitions, 2300 flow, removed 36 selfloop flow, removed 9 redundant places. [2023-11-23 22:31:22,283 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1540 flow [2023-11-23 22:31:22,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1540, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2023-11-23 22:31:22,284 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2023-11-23 22:31:22,285 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1540 flow [2023-11-23 22:31:22,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 22:31:22,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:22,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 22:31:22,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:22,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:31:22,505 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:22,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash 879594951, now seen corresponding path program 4 times [2023-11-23 22:31:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706873224] [2023-11-23 22:31:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:23,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706873224] [2023-11-23 22:31:23,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706873224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875904128] [2023-11-23 22:31:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:31:23,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:23,897 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:23,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:31:24,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:31:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:24,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 22:31:24,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:24,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:31:24,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2023-11-23 22:31:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:24,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:27,007 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-23 22:31:27,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-23 22:31:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 22:31:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875904128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:27,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:27,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2023-11-23 22:31:27,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226726326] [2023-11-23 22:31:27,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 22:31:27,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 22:31:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=600, Unknown=1, NotChecked=0, Total=702 [2023-11-23 22:31:27,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2023-11-23 22:31:27,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1540 flow. Second operand has 27 states, 27 states have (on average 6.296296296296297) internal successors, (170), 27 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 22:31:27,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:27,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2023-11-23 22:31:27,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:30,482 INFO L124 PetriNetUnfolderBase]: 2096/3078 cut-off events. [2023-11-23 22:31:30,482 INFO L125 PetriNetUnfolderBase]: For 24409/24409 co-relation queries the response was YES. [2023-11-23 22:31:30,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3078 events. 2096/3078 cut-off events. For 24409/24409 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13677 event pairs, 327 based on Foata normal form. 1/3065 useless extension candidates. Maximal degree in co-relation 16962. Up to 1152 conditions per place. [2023-11-23 22:31:30,522 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 162 selfloop transitions, 85 changer transitions 3/251 dead transitions. [2023-11-23 22:31:30,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 251 transitions, 2562 flow [2023-11-23 22:31:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 22:31:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-23 22:31:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 242 transitions. [2023-11-23 22:31:30,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2023-11-23 22:31:30,525 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 242 transitions. [2023-11-23 22:31:30,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 242 transitions. [2023-11-23 22:31:30,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:30,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 242 transitions. [2023-11-23 22:31:30,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.736842105263158) internal successors, (242), 19 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 22:31:30,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 22:31:30,529 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 22:31:30,529 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1540 flow. Second operand 19 states and 242 transitions. [2023-11-23 22:31:30,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 251 transitions, 2562 flow [2023-11-23 22:31:30,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 2445 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-11-23 22:31:30,669 INFO L231 Difference]: Finished difference. Result has 126 places, 150 transitions, 1624 flow [2023-11-23 22:31:30,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1624, PETRI_PLACES=126, PETRI_TRANSITIONS=150} [2023-11-23 22:31:30,670 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2023-11-23 22:31:30,670 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 150 transitions, 1624 flow [2023-11-23 22:31:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.296296296296297) internal successors, (170), 27 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 22:31:30,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:30,671 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 22:31:30,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:30,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5252467b-337b-4e44-9d51-0d5374d01882/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:31:30,885 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 22:31:30,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:30,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1725020341, now seen corresponding path program 5 times [2023-11-23 22:31:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:30,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196217111] [2023-11-23 22:31:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat