./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.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_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/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_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/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_bd8626ac-ffb0-429f-9eb4-d85611d7f464/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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:28:46,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:28:46,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:28:46,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:28:46,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:28:46,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:28:46,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:28:46,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:28:46,900 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:28:46,901 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:28:46,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:28:46,902 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:28:46,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:28:46,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:28:46,905 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:28:46,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:28:46,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:28:46,907 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:28:46,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:28:46,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:28:46,909 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:28:46,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:28:46,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:28:46,912 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:28:46,912 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:28:46,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:28:46,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:28:46,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:28:46,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:28:46,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:28:46,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:28:46,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:28:46,936 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:28:46,936 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:28:46,937 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:28:46,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:28:46,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:28:46,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:28:46,938 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:28:46,939 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:28:46,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:28:46,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:28:46,940 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_bd8626ac-ffb0-429f-9eb4-d85611d7f464/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2023-11-23 22:28:47,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:28:47,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:28:47,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:28:47,328 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:28:47,328 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:28:47,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-23 22:28:51,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:28:51,345 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:28:51,346 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-23 22:28:51,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/data/b6accc077/6b696dc00e8640c38acfcc8e8c8eaab9/FLAG924496ac1 [2023-11-23 22:28:51,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/data/b6accc077/6b696dc00e8640c38acfcc8e8c8eaab9 [2023-11-23 22:28:51,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:28:51,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:28:51,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:28:51,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:28:51,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:28:51,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:51,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300da02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51, skipping insertion in model container [2023-11-23 22:28:51,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:51,432 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:28:51,742 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_bd8626ac-ffb0-429f-9eb4-d85611d7f464/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2023-11-23 22:28:51,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:28:51,771 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:28:51,806 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_bd8626ac-ffb0-429f-9eb4-d85611d7f464/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2023-11-23 22:28:51,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:28:51,825 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:51,826 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:28:51,835 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:28:51,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51 WrapperNode [2023-11-23 22:28:51,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:28:51,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:28:51,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:28:51,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:28:51,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:51,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:51,940 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 240 [2023-11-23 22:28:51,940 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:28:51,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:28:51,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:28:51,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:28:51,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:51,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:51,990 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,031 INFO L189 HeapSplitter]: Split 24 memory accesses to 5 slices as follows [2, 2, 16, 2, 2] [2023-11-23 22:28:52,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:28:52,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:28:52,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:28:52,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:28:52,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (1/1) ... [2023-11-23 22:28:52,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:28:52,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:52,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:28:52,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:28:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:28:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:28:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:28:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:28:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:28:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:28:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:28:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:28:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:28:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:28:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:28:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:28:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:28:52,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:28:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:28:52,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:28:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:28:52,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:28:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:28:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:28:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:28:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:28:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:28:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:28:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:28:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:28:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:28:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:28:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:28:52,167 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 22:28:52,336 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:28:52,339 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:28:52,982 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:28:53,555 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:28:53,556 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 22:28:53,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:53 BoogieIcfgContainer [2023-11-23 22:28:53,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:28:53,559 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:28:53,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:28:53,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:28:53,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:28:51" (1/3) ... [2023-11-23 22:28:53,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4466929f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:53, skipping insertion in model container [2023-11-23 22:28:53,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:51" (2/3) ... [2023-11-23 22:28:53,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4466929f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:53, skipping insertion in model container [2023-11-23 22:28:53,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:53" (3/3) ... [2023-11-23 22:28:53,567 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2023-11-23 22:28:53,579 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:28:53,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:28:53,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:28:53,593 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:28:53,661 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:28:53,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 41 transitions, 103 flow [2023-11-23 22:28:53,764 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2023-11-23 22:28:53,764 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:28:53,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 7/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-23 22:28:53,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 41 transitions, 103 flow [2023-11-23 22:28:53,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 92 flow [2023-11-23 22:28:53,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:28:53,813 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;@3b378de4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:28:53,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:28:53,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:28:53,842 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-23 22:28:53,843 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:28:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:53,844 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 22:28:53,845 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 22:28:53,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2092303507, now seen corresponding path program 1 times [2023-11-23 22:28:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:53,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945396486] [2023-11-23 22:28:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:53,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:54,562 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 22:28:54,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:54,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945396486] [2023-11-23 22:28:54,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945396486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:54,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:54,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:28:54,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178094398] [2023-11-23 22:28:54,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:54,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:54,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-23 22:28:54,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:28:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-23 22:28:54,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:54,929 INFO L124 PetriNetUnfolderBase]: 406/689 cut-off events. [2023-11-23 22:28:54,930 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-23 22:28:54,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 689 events. 406/689 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2827 event pairs, 265 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 993. Up to 557 conditions per place. [2023-11-23 22:28:54,942 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 29 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-23 22:28:54,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2023-11-23 22:28:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-23 22:28:54,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2023-11-23 22:28:54,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-23 22:28:54,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-23 22:28:54,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:54,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-23 22:28:54,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 22:28:54,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 22:28:54,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 22:28:54,969 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 92 flow. Second operand 3 states and 62 transitions. [2023-11-23 22:28:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2023-11-23 22:28:54,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 22:28:54,980 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 92 flow [2023-11-23 22:28:54,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-23 22:28:54,987 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-11-23 22:28:54,988 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 92 flow [2023-11-23 22:28:54,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 22:28:54,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:54,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:54,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:28:54,990 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 22:28:54,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2133776376, now seen corresponding path program 1 times [2023-11-23 22:28:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801242319] [2023-11-23 22:28:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:28:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801242319] [2023-11-23 22:28:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801242319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:28:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429642649] [2023-11-23 22:28:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:55,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:55,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-23 22:28:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:28:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-23 22:28:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:55,541 INFO L124 PetriNetUnfolderBase]: 406/691 cut-off events. [2023-11-23 22:28:55,541 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-23 22:28:55,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 691 events. 406/691 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2830 event pairs, 265 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 1264. Up to 556 conditions per place. [2023-11-23 22:28:55,548 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-23 22:28:55,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 162 flow [2023-11-23 22:28:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:28:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:28:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2023-11-23 22:28:55,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2023-11-23 22:28:55,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 75 transitions. [2023-11-23 22:28:55,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 75 transitions. [2023-11-23 22:28:55,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:55,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 75 transitions. [2023-11-23 22:28:55,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 22:28:55,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 22:28:55,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 22:28:55,554 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 92 flow. Second operand 4 states and 75 transitions. [2023-11-23 22:28:55,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 162 flow [2023-11-23 22:28:55,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 158 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:55,556 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 116 flow [2023-11-23 22:28:55,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-11-23 22:28:55,557 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-23 22:28:55,558 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 116 flow [2023-11-23 22:28:55,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:28:55,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:55,558 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 22:28:55,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:28:55,559 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 22:28:55,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:55,559 INFO L85 PathProgramCache]: Analyzing trace with hash 571813758, now seen corresponding path program 1 times [2023-11-23 22:28:55,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:55,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827932724] [2023-11-23 22:28:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:55,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:55,733 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 22:28:55,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:55,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827932724] [2023-11-23 22:28:55,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827932724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:55,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:55,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:28:55,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178211780] [2023-11-23 22:28:55,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:55,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:55,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:28:55,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-23 22:28:55,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 116 flow. Second operand has 3 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 22:28:55,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:55,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-23 22:28:55,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:56,015 INFO L124 PetriNetUnfolderBase]: 584/1064 cut-off events. [2023-11-23 22:28:56,016 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-23 22:28:56,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 1064 events. 584/1064 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4922 event pairs, 191 based on Foata normal form. 1/937 useless extension candidates. Maximal degree in co-relation 1850. Up to 398 conditions per place. [2023-11-23 22:28:56,027 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 44 selfloop transitions, 2 changer transitions 2/55 dead transitions. [2023-11-23 22:28:56,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 245 flow [2023-11-23 22:28:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-23 22:28:56,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2023-11-23 22:28:56,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-23 22:28:56,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-23 22:28:56,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:56,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-23 22:28:56,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:56,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 22:28:56,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 22:28:56,037 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 116 flow. Second operand 3 states and 76 transitions. [2023-11-23 22:28:56,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 245 flow [2023-11-23 22:28:56,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:56,041 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 127 flow [2023-11-23 22:28:56,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-23 22:28:56,043 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-23 22:28:56,044 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 127 flow [2023-11-23 22:28:56,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 22:28:56,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:56,046 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, 1, 1, 1, 1, 1] [2023-11-23 22:28:56,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:28:56,046 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 22:28:56,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash -486309193, now seen corresponding path program 1 times [2023-11-23 22:28:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455127696] [2023-11-23 22:28:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:28:56,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:56,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455127696] [2023-11-23 22:28:56,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455127696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:56,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484856781] [2023-11-23 22:28:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:56,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:56,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:56,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:56,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:28:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:56,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:28:56,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:28:56,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:28:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484856781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:56,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:56,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 22:28:56,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832835163] [2023-11-23 22:28:56,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:28:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:28:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:28:56,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2023-11-23 22:28:56,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 127 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 22:28:56,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:56,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2023-11-23 22:28:56,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:57,382 INFO L124 PetriNetUnfolderBase]: 997/1625 cut-off events. [2023-11-23 22:28:57,382 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-23 22:28:57,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3191 conditions, 1625 events. 997/1625 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7161 event pairs, 444 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 2347. Up to 765 conditions per place. [2023-11-23 22:28:57,394 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 40 selfloop transitions, 10 changer transitions 41/97 dead transitions. [2023-11-23 22:28:57,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 462 flow [2023-11-23 22:28:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:28:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 22:28:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2023-11-23 22:28:57,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2023-11-23 22:28:57,397 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 172 transitions. [2023-11-23 22:28:57,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 172 transitions. [2023-11-23 22:28:57,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:57,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 172 transitions. [2023-11-23 22:28:57,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 22:28:57,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 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 22:28:57,401 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 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 22:28:57,401 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 127 flow. Second operand 9 states and 172 transitions. [2023-11-23 22:28:57,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 462 flow [2023-11-23 22:28:57,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:57,406 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 177 flow [2023-11-23 22:28:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-23 22:28:57,407 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2023-11-23 22:28:57,407 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 177 flow [2023-11-23 22:28:57,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 22:28:57,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:57,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1] [2023-11-23 22:28:57,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:57,635 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 22:28:57,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash -363157052, now seen corresponding path program 2 times [2023-11-23 22:28:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:57,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217658986] [2023-11-23 22:28:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:28:57,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217658986] [2023-11-23 22:28:57,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217658986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:57,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88998866] [2023-11-23 22:28:57,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:28:57,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:57,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:57,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:57,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:28:58,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:28:58,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:28:58,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:28:58,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:28:58,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 22:28:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88998866] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:28:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-23 22:28:58,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666116912] [2023-11-23 22:28:58,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:28:58,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-23 22:28:58,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:58,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:58,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-23 22:28:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:58,568 INFO L124 PetriNetUnfolderBase]: 728/1293 cut-off events. [2023-11-23 22:28:58,568 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-11-23 22:28:58,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1293 events. 728/1293 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6277 event pairs, 299 based on Foata normal form. 0/1156 useless extension candidates. Maximal degree in co-relation 2569. Up to 771 conditions per place. [2023-11-23 22:28:58,581 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-11-23 22:28:58,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 321 flow [2023-11-23 22:28:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:28:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2023-11-23 22:28:58,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2023-11-23 22:28:58,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2023-11-23 22:28:58,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2023-11-23 22:28:58,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:58,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2023-11-23 22:28:58,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 22:28:58,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:28:58,587 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:28:58,587 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 177 flow. Second operand 6 states and 107 transitions. [2023-11-23 22:28:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 321 flow [2023-11-23 22:28:58,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 301 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-23 22:28:58,596 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 177 flow [2023-11-23 22:28:58,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-23 22:28:58,597 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-11-23 22:28:58,598 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 177 flow [2023-11-23 22:28:58,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:58,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:58,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1] [2023-11-23 22:28:58,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:58,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:58,816 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 22:28:58,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1231162789, now seen corresponding path program 1 times [2023-11-23 22:28:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913514115] [2023-11-23 22:28:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:28:59,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913514115] [2023-11-23 22:28:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913514115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303446971] [2023-11-23 22:28:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:59,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:59,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:28:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:59,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:28:59,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:28:59,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:28:59,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303446971] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:59,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:28:59,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-23 22:28:59,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557135676] [2023-11-23 22:28:59,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:59,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:59,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:28:59,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2023-11-23 22:28:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 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 22:28:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:59,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2023-11-23 22:28:59,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:59,746 INFO L124 PetriNetUnfolderBase]: 1060/1806 cut-off events. [2023-11-23 22:28:59,746 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2023-11-23 22:28:59,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 1806 events. 1060/1806 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8800 event pairs, 355 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 3946. Up to 752 conditions per place. [2023-11-23 22:28:59,764 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 48 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-11-23 22:28:59,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 333 flow [2023-11-23 22:28:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:28:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2023-11-23 22:28:59,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2023-11-23 22:28:59,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 101 transitions. [2023-11-23 22:28:59,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 101 transitions. [2023-11-23 22:28:59,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:59,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 101 transitions. [2023-11-23 22:28:59,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 22:28:59,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:28:59,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:28:59,772 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 177 flow. Second operand 6 states and 101 transitions. [2023-11-23 22:28:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 333 flow [2023-11-23 22:28:59,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 319 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-23 22:28:59,783 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 192 flow [2023-11-23 22:28:59,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-23 22:28:59,787 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-11-23 22:28:59,788 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 192 flow [2023-11-23 22:28:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 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 22:28:59,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:59,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:29:00,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:00,004 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 22:29:00,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash -926828371, now seen corresponding path program 1 times [2023-11-23 22:29:00,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:00,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079319010] [2023-11-23 22:29:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:29:00,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079319010] [2023-11-23 22:29:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079319010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:29:00,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:29:00,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:29:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572471797] [2023-11-23 22:29:00,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:29:00,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:29:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:29:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:29:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:29:00,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2023-11-23 22:29:00,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:29:00,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:29:00,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2023-11-23 22:29:00,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:29:00,964 INFO L124 PetriNetUnfolderBase]: 1432/2154 cut-off events. [2023-11-23 22:29:00,964 INFO L125 PetriNetUnfolderBase]: For 983/983 co-relation queries the response was YES. [2023-11-23 22:29:00,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5380 conditions, 2154 events. 1432/2154 cut-off events. For 983/983 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8444 event pairs, 261 based on Foata normal form. 0/1969 useless extension candidates. Maximal degree in co-relation 5344. Up to 1356 conditions per place. [2023-11-23 22:29:00,982 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 79 selfloop transitions, 9 changer transitions 1/93 dead transitions. [2023-11-23 22:29:00,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 510 flow [2023-11-23 22:29:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:29:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:29:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2023-11-23 22:29:00,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2023-11-23 22:29:00,984 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 115 transitions. [2023-11-23 22:29:00,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 115 transitions. [2023-11-23 22:29:00,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:29:00,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 115 transitions. [2023-11-23 22:29:00,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 22:29:00,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:29:00,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:29:00,986 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 192 flow. Second operand 6 states and 115 transitions. [2023-11-23 22:29:00,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 510 flow [2023-11-23 22:29:00,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 93 transitions, 499 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:29:00,996 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 254 flow [2023-11-23 22:29:00,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-23 22:29:00,997 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-11-23 22:29:00,997 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 254 flow [2023-11-23 22:29:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 22:29:00,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:29:00,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-11-23 22:29:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:29:00,999 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 22:29:00,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:29:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1822430167, now seen corresponding path program 2 times [2023-11-23 22:29:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:29:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936776410] [2023-11-23 22:29:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:29:01,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:29:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:29:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:29:04,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:29:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936776410] [2023-11-23 22:29:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936776410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:29:04,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920663033] [2023-11-23 22:29:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:29:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:29:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:29:04,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:29:04,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd8626ac-ffb0-429f-9eb4-d85611d7f464/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:29:04,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:29:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:29:04,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 22:29:04,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:29:05,964 INFO L349 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2023-11-23 22:29:05,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 93