./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU --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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:47,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:47,405 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:11:47,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:47,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:47,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:47,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:47,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:47,473 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:47,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:47,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:47,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:47,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:47,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:47,479 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:47,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:47,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:11:47,483 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:47,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:47,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:47,487 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:47,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:11:47,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:47,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:11:47,489 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:47,490 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:47,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:11:47,490 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:47,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:47,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:47,491 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:47,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:47,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:47,495 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:47,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:47,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:11:47,496 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:47,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:47,496 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:47,496 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:47,497 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:47,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:47,498 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_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2024-10-31 22:11:47,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:47,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:47,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:47,908 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:47,909 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:47,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/stack-1.i Unable to find full path for "g++" [2024-10-31 22:11:50,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:50,632 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:50,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/sv-benchmarks/c/pthread/stack-1.i [2024-10-31 22:11:50,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/data/bfc89f640/f5a0eea1f6cf4d8e88b765fe0b317f81/FLAG8c03f4ac3 [2024-10-31 22:11:50,837 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/data/bfc89f640/f5a0eea1f6cf4d8e88b765fe0b317f81 [2024-10-31 22:11:50,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:50,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:50,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:50,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:50,851 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:50,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:50" (1/1) ... [2024-10-31 22:11:50,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774d37cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:50, skipping insertion in model container [2024-10-31 22:11:50,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:50" (1/1) ... [2024-10-31 22:11:50,932 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:51,541 WARN L251 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_0dfca811-fc64-4ef6-ae19-46467c572e8d/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2024-10-31 22:11:51,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:51,602 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:51,677 WARN L251 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_0dfca811-fc64-4ef6-ae19-46467c572e8d/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2024-10-31 22:11:51,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:51,792 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:51,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51 WrapperNode [2024-10-31 22:11:51,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:51,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:51,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:51,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:51,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,877 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2024-10-31 22:11:51,881 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:51,882 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:51,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:51,886 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:51,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,903 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,926 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 1, 0]. [2024-10-31 22:11:51,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,953 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:51,954 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:51,954 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:51,954 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:51,955 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:52,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:52,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-31 22:11:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-31 22:11:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-31 22:11:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-31 22:11:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:11:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:11:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:11:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:11:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:11:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:11:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:11:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:11:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:11:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:11:52,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:52,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:52,118 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:11:52,306 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:52,308 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:52,621 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:11:52,621 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:52,926 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:52,926 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:11:52,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:52 BoogieIcfgContainer [2024-10-31 22:11:52,927 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:52,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:52,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:52,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:52,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:50" (1/3) ... [2024-10-31 22:11:52,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@972d58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:52, skipping insertion in model container [2024-10-31 22:11:52,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (2/3) ... [2024-10-31 22:11:52,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@972d58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:52, skipping insertion in model container [2024-10-31 22:11:52,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:52" (3/3) ... [2024-10-31 22:11:52,954 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-10-31 22:11:52,987 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:52,987 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 22:11:52,987 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:11:53,090 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:11:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-10-31 22:11:53,203 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-10-31 22:11:53,204 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:11:53,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-10-31 22:11:53,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-10-31 22:11:53,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2024-10-31 22:11:53,232 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:53,240 INFO L333 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, 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;@ee295c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:53,240 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-31 22:11:53,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:53,260 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-31 22:11:53,261 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:11:53,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:53,262 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:53,262 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:11:53,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1269206587, now seen corresponding path program 1 times [2024-10-31 22:11:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:53,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858030387] [2024-10-31 22:11:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:53,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:53,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858030387] [2024-10-31 22:11:53,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858030387] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:53,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:53,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902735210] [2024-10-31 22:11:53,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:53,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:53,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:54,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-31 22:11:54,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:54,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:54,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-31 22:11:54,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:54,446 INFO L124 PetriNetUnfolderBase]: 307/564 cut-off events. [2024-10-31 22:11:54,446 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-10-31 22:11:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 564 events. 307/564 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2471 event pairs, 53 based on Foata normal form. 40/558 useless extension candidates. Maximal degree in co-relation 1043. Up to 358 conditions per place. [2024-10-31 22:11:54,464 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-10-31 22:11:54,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2024-10-31 22:11:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-10-31 22:11:54,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-10-31 22:11:54,505 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2024-10-31 22:11:54,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2024-10-31 22:11:54,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:54,518 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2024-10-31 22:11:54,525 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-10-31 22:11:54,530 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-10-31 22:11:54,534 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2024-10-31 22:11:54,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:54,535 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:54,535 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:54,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:54,536 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:11:54,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash 659531552, now seen corresponding path program 1 times [2024-10-31 22:11:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:54,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978051982] [2024-10-31 22:11:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:55,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:55,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978051982] [2024-10-31 22:11:55,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978051982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:55,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806555679] [2024-10-31 22:11:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:55,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:55,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:11:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:55,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:11:55,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:55,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:11:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:55,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:55,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806555679] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:55,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:55,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-31 22:11:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135927185] [2024-10-31 22:11:55,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:55,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:11:55,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:11:55,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:11:55,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-31 22:11:55,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:55,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:55,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-31 22:11:55,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:56,730 INFO L124 PetriNetUnfolderBase]: 1257/2332 cut-off events. [2024-10-31 22:11:56,730 INFO L125 PetriNetUnfolderBase]: For 297/299 co-relation queries the response was YES. [2024-10-31 22:11:56,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 2332 events. 1257/2332 cut-off events. For 297/299 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12465 event pairs, 153 based on Foata normal form. 48/2272 useless extension candidates. Maximal degree in co-relation 4362. Up to 365 conditions per place. [2024-10-31 22:11:56,754 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2024-10-31 22:11:56,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2024-10-31 22:11:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:11:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-31 22:11:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2024-10-31 22:11:56,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2024-10-31 22:11:56,762 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2024-10-31 22:11:56,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2024-10-31 22:11:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:56,775 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2024-10-31 22:11:56,776 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2024-10-31 22:11:56,777 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-10-31 22:11:56,778 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2024-10-31 22:11:56,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:56,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:56,779 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:56,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:56,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-31 22:11:56,980 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:11:56,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 356178246, now seen corresponding path program 1 times [2024-10-31 22:11:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384408546] [2024-10-31 22:11:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:57,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:57,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384408546] [2024-10-31 22:11:57,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384408546] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:57,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:57,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:57,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412524269] [2024-10-31 22:11:57,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:57,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:57,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-31 22:11:57,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:57,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:57,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-31 22:11:57,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:57,466 INFO L124 PetriNetUnfolderBase]: 669/1351 cut-off events. [2024-10-31 22:11:57,466 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2024-10-31 22:11:57,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3062 conditions, 1351 events. 669/1351 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6879 event pairs, 231 based on Foata normal form. 66/1398 useless extension candidates. Maximal degree in co-relation 2914. Up to 634 conditions per place. [2024-10-31 22:11:57,480 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-10-31 22:11:57,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2024-10-31 22:11:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-10-31 22:11:57,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-10-31 22:11:57,483 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2024-10-31 22:11:57,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2024-10-31 22:11:57,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:57,506 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2024-10-31 22:11:57,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-10-31 22:11:57,509 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2024-10-31 22:11:57,510 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2024-10-31 22:11:57,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:57,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:57,512 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:57,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:11:57,512 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:11:57,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash -380979425, now seen corresponding path program 1 times [2024-10-31 22:11:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:57,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013503903] [2024-10-31 22:11:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:58,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:58,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013503903] [2024-10-31 22:11:58,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013503903] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:58,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:58,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:11:58,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872724332] [2024-10-31 22:11:58,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:58,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:58,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-31 22:11:58,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:58,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:58,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-31 22:11:58,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:58,746 INFO L124 PetriNetUnfolderBase]: 833/1677 cut-off events. [2024-10-31 22:11:58,746 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2024-10-31 22:11:58,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3827 conditions, 1677 events. 833/1677 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8738 event pairs, 255 based on Foata normal form. 0/1652 useless extension candidates. Maximal degree in co-relation 3447. Up to 977 conditions per place. [2024-10-31 22:11:58,758 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 58 selfloop transitions, 7 changer transitions 5/82 dead transitions. [2024-10-31 22:11:58,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 438 flow [2024-10-31 22:11:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:11:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-10-31 22:11:58,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5647058823529412 [2024-10-31 22:11:58,763 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 96 transitions. [2024-10-31 22:11:58,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 438 flow [2024-10-31 22:11:58,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:11:58,771 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 251 flow [2024-10-31 22:11:58,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2024-10-31 22:11:58,772 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2024-10-31 22:11:58,772 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 251 flow [2024-10-31 22:11:58,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:58,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:58,774 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:58,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:58,774 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:11:58,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash -100639858, now seen corresponding path program 1 times [2024-10-31 22:11:58,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351527482] [2024-10-31 22:11:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:59,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351527482] [2024-10-31 22:11:59,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351527482] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:59,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999735991] [2024-10-31 22:11:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:59,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:59,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:59,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:12:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:00,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:12:00,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:00,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:12:00,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-10-31 22:12:00,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-10-31 22:12:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:00,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:12:01,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-10-31 22:12:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:01,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999735991] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:12:01,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:12:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-10-31 22:12:01,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684675608] [2024-10-31 22:12:01,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:12:01,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:12:01,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:12:01,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:12:01,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-31 22:12:01,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 251 flow. Second operand has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:01,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:01,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-31 22:12:01,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:03,689 INFO L124 PetriNetUnfolderBase]: 2028/3961 cut-off events. [2024-10-31 22:12:03,689 INFO L125 PetriNetUnfolderBase]: For 1703/1703 co-relation queries the response was YES. [2024-10-31 22:12:03,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8994 conditions, 3961 events. 2028/3961 cut-off events. For 1703/1703 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 21766 event pairs, 275 based on Foata normal form. 14/3891 useless extension candidates. Maximal degree in co-relation 7914. Up to 650 conditions per place. [2024-10-31 22:12:03,720 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 273 selfloop transitions, 64 changer transitions 34/376 dead transitions. [2024-10-31 22:12:03,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 376 transitions, 1965 flow [2024-10-31 22:12:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 22:12:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-10-31 22:12:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 594 transitions. [2024-10-31 22:12:03,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5459558823529411 [2024-10-31 22:12:03,724 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 251 flow. Second operand 32 states and 594 transitions. [2024-10-31 22:12:03,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 376 transitions, 1965 flow [2024-10-31 22:12:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 376 transitions, 1950 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-31 22:12:03,742 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 633 flow [2024-10-31 22:12:03,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=633, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-10-31 22:12:03,743 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 61 predicate places. [2024-10-31 22:12:03,743 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 633 flow [2024-10-31 22:12:03,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:03,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:03,744 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:03,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:12:03,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:03,945 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:12:03,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 622822585, now seen corresponding path program 1 times [2024-10-31 22:12:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569676640] [2024-10-31 22:12:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:12:04,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:04,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569676640] [2024-10-31 22:12:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569676640] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307557903] [2024-10-31 22:12:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:04,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:04,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:04,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:12:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:04,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:12:04,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:04,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:12:04,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:12:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:04,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:12:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:12:04,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307557903] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:12:04,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:12:04,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-10-31 22:12:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684814757] [2024-10-31 22:12:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:12:04,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:12:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:12:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:12:04,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-31 22:12:04,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 633 flow. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:04,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:04,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-31 22:12:04,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:06,901 INFO L124 PetriNetUnfolderBase]: 2986/5858 cut-off events. [2024-10-31 22:12:06,902 INFO L125 PetriNetUnfolderBase]: For 5470/5470 co-relation queries the response was YES. [2024-10-31 22:12:06,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14237 conditions, 5858 events. 2986/5858 cut-off events. For 5470/5470 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 36515 event pairs, 355 based on Foata normal form. 42/5837 useless extension candidates. Maximal degree in co-relation 13664. Up to 962 conditions per place. [2024-10-31 22:12:06,957 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 187 selfloop transitions, 97 changer transitions 8/297 dead transitions. [2024-10-31 22:12:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 297 transitions, 1969 flow [2024-10-31 22:12:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:12:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-31 22:12:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 352 transitions. [2024-10-31 22:12:06,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.544891640866873 [2024-10-31 22:12:06,960 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 633 flow. Second operand 19 states and 352 transitions. [2024-10-31 22:12:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 297 transitions, 1969 flow [2024-10-31 22:12:06,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 297 transitions, 1929 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-10-31 22:12:06,996 INFO L231 Difference]: Finished difference. Result has 116 places, 137 transitions, 1151 flow [2024-10-31 22:12:06,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1151, PETRI_PLACES=116, PETRI_TRANSITIONS=137} [2024-10-31 22:12:06,998 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 84 predicate places. [2024-10-31 22:12:06,998 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 137 transitions, 1151 flow [2024-10-31 22:12:06,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:06,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:06,998 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:07,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:12:07,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:12:07,199 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 22:12:07,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2016074313, now seen corresponding path program 1 times [2024-10-31 22:12:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:07,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911189548] [2024-10-31 22:12:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:07,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:08,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:08,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911189548] [2024-10-31 22:12:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911189548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085065198] [2024-10-31 22:12:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:08,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:08,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:08,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfca811-fc64-4ef6-ae19-46467c572e8d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:12:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:08,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:12:08,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:08,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-31 22:12:08,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-10-31 22:12:08,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-10-31 22:12:08,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2024-10-31 22:12:09,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:12:09,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-10-31 22:12:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:09,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:12:11,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:12:11,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-10-31 22:12:11,085 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-10-31 22:12:11,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 66 [2024-10-31 22:12:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085065198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:12:11,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:12:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-31 22:12:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036363508] [2024-10-31 22:12:11,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:12:11,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:12:11,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:12:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:12:11,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-31 22:12:11,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 137 transitions, 1151 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:11,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:11,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-31 22:12:11,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand