./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:44:58,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:44:58,215 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:44:58,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:44:58,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:44:58,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:44:58,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:44:58,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:44:58,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:44:58,271 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:44:58,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:44:58,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:44:58,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:44:58,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:44:58,276 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:44:58,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:44:58,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:44:58,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:44:58,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:44:58,279 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:44:58,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:44:58,280 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:44:58,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:44:58,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:44:58,281 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:44:58,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:44:58,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:44:58,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:44:58,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:44:58,284 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:44:58,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:44:58,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:58,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:44:58,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:44:58,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:44:58,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:44:58,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:44:58,287 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:44:58,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:44:58,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:44:58,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:44:58,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:44:58,289 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_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2023-11-26 11:44:58,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:44:58,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:44:58,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:44:58,658 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:44:58,658 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:44:58,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-26 11:45:01,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:45:02,064 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:45:02,064 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-26 11:45:02,074 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/data/3021005bf/015687278b7844cf859f96d24e2aaea8/FLAG6d8576852 [2023-11-26 11:45:02,090 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/data/3021005bf/015687278b7844cf859f96d24e2aaea8 [2023-11-26 11:45:02,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:45:02,095 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:45:02,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:02,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:45:02,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:45:02,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440af182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02, skipping insertion in model container [2023-11-26 11:45:02,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,145 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:45:02,355 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_da28b20a-635e-4032-bcfc-67a0143dd3e6/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2023-11-26 11:45:02,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:02,377 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:45:02,403 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_da28b20a-635e-4032-bcfc-67a0143dd3e6/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2023-11-26 11:45:02,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:02,416 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:45:02,417 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:45:02,425 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:45:02,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02 WrapperNode [2023-11-26 11:45:02,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:02,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:02,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:45:02,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:45:02,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,489 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 199 [2023-11-26 11:45:02,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:02,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:45:02,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:45:02,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:45:02,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,507 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,527 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 2, 8]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 2]. [2023-11-26 11:45:02,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:45:02,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:45:02,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:45:02,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:45:02,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (1/1) ... [2023-11-26 11:45:02,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:02,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:45:02,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:45:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:45:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:45:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:45:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:45:02,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:45:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:45:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:45:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:45:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:45:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:45:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:45:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:45:02,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:45:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:45:02,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:45:02,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:45:02,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:45:02,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:45:02,638 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:45:02,787 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:45:02,793 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:45:03,238 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:45:03,722 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:45:03,723 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:45:03,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:03 BoogieIcfgContainer [2023-11-26 11:45:03,723 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:45:03,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:45:03,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:45:03,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:45:03,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:45:02" (1/3) ... [2023-11-26 11:45:03,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9984a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:03, skipping insertion in model container [2023-11-26 11:45:03,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:02" (2/3) ... [2023-11-26 11:45:03,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9984a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:03, skipping insertion in model container [2023-11-26 11:45:03,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:03" (3/3) ... [2023-11-26 11:45:03,737 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-11-26 11:45:03,750 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:45:03,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:45:03,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:45:03,762 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:45:03,826 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:45:03,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 32 transitions, 78 flow [2023-11-26 11:45:03,923 INFO L124 PetriNetUnfolderBase]: 5/30 cut-off events. [2023-11-26 11:45:03,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:45:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 5/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-26 11:45:03,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 32 transitions, 78 flow [2023-11-26 11:45:03,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 29 transitions, 70 flow [2023-11-26 11:45:03,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:45:03,948 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;@1ee7b17b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:45:03,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:45:03,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:45:03,960 INFO L124 PetriNetUnfolderBase]: 5/28 cut-off events. [2023-11-26 11:45:03,961 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:45:03,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:03,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:03,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:03,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash 547110899, now seen corresponding path program 1 times [2023-11-26 11:45:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:03,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974614524] [2023-11-26 11:45:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:04,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:04,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974614524] [2023-11-26 11:45:04,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974614524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:04,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:04,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:04,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858531527] [2023-11-26 11:45:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:04,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:04,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:04,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:04,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:04,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:04,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:04,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:04,801 INFO L124 PetriNetUnfolderBase]: 207/354 cut-off events. [2023-11-26 11:45:04,802 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-26 11:45:04,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 354 events. 207/354 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1421 event pairs, 51 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 651. Up to 197 conditions per place. [2023-11-26 11:45:04,810 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 32 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-11-26 11:45:04,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 167 flow [2023-11-26 11:45:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:45:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2023-11-26 11:45:04,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-11-26 11:45:04,826 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 68 transitions. [2023-11-26 11:45:04,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 68 transitions. [2023-11-26 11:45:04,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:04,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 68 transitions. [2023-11-26 11:45:04,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:04,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:04,838 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:04,840 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 70 flow. Second operand 4 states and 68 transitions. [2023-11-26 11:45:04,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 167 flow [2023-11-26 11:45:04,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 157 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:45:04,848 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 76 flow [2023-11-26 11:45:04,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-11-26 11:45:04,855 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-26 11:45:04,855 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 76 flow [2023-11-26 11:45:04,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:04,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:04,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:04,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:45:04,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:04,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:04,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1937993546, now seen corresponding path program 1 times [2023-11-26 11:45:04,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:04,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345311757] [2023-11-26 11:45:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345311757] [2023-11-26 11:45:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345311757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:05,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166366184] [2023-11-26 11:45:05,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:05,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:05,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:05,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:05,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:05,370 INFO L124 PetriNetUnfolderBase]: 207/379 cut-off events. [2023-11-26 11:45:05,370 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-26 11:45:05,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 379 events. 207/379 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1633 event pairs, 129 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 285. Up to 329 conditions per place. [2023-11-26 11:45:05,380 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 23 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-26 11:45:05,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 128 flow [2023-11-26 11:45:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2023-11-26 11:45:05,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-11-26 11:45:05,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 49 transitions. [2023-11-26 11:45:05,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 49 transitions. [2023-11-26 11:45:05,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:05,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 49 transitions. [2023-11-26 11:45:05,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,395 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 76 flow. Second operand 3 states and 49 transitions. [2023-11-26 11:45:05,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 128 flow [2023-11-26 11:45:05,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:05,404 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 84 flow [2023-11-26 11:45:05,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-26 11:45:05,408 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-11-26 11:45:05,409 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 84 flow [2023-11-26 11:45:05,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:05,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:05,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:45:05,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:05,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash 855847812, now seen corresponding path program 1 times [2023-11-26 11:45:05,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:05,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013349055] [2023-11-26 11:45:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:45:05,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:05,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013349055] [2023-11-26 11:45:05,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013349055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:05,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:05,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401622534] [2023-11-26 11:45:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:05,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:05,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:05,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:05,724 INFO L124 PetriNetUnfolderBase]: 263/492 cut-off events. [2023-11-26 11:45:05,724 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-26 11:45:05,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 492 events. 263/492 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2197 event pairs, 96 based on Foata normal form. 1/445 useless extension candidates. Maximal degree in co-relation 977. Up to 221 conditions per place. [2023-11-26 11:45:05,728 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 36 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2023-11-26 11:45:05,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 202 flow [2023-11-26 11:45:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-26 11:45:05,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2023-11-26 11:45:05,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-26 11:45:05,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-26 11:45:05,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:05,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-26 11:45:05,732 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) [2023-11-26 11:45:05,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,734 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 84 flow. Second operand 3 states and 62 transitions. [2023-11-26 11:45:05,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 202 flow [2023-11-26 11:45:05,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 198 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:05,737 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 92 flow [2023-11-26 11:45:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-26 11:45:05,738 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-26 11:45:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 92 flow [2023-11-26 11:45:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:05,739 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] [2023-11-26 11:45:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:45:05,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:05,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash 165802299, now seen corresponding path program 1 times [2023-11-26 11:45:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:05,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879191746] [2023-11-26 11:45:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:05,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:05,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879191746] [2023-11-26 11:45:05,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879191746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:05,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:05,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:05,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151830238] [2023-11-26 11:45:05,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:05,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:05,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:05,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:05,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:05,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:05,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:05,987 INFO L124 PetriNetUnfolderBase]: 257/487 cut-off events. [2023-11-26 11:45:05,987 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-26 11:45:05,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 487 events. 257/487 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2173 event pairs, 107 based on Foata normal form. 10/460 useless extension candidates. Maximal degree in co-relation 1055. Up to 326 conditions per place. [2023-11-26 11:45:05,991 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 33 selfloop transitions, 2 changer transitions 5/46 dead transitions. [2023-11-26 11:45:05,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 209 flow [2023-11-26 11:45:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-26 11:45:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2023-11-26 11:45:05,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-26 11:45:05,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-26 11:45:05,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:05,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-26 11:45:05,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,004 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 92 flow. Second operand 3 states and 61 transitions. [2023-11-26 11:45:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 209 flow [2023-11-26 11:45:06,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:06,011 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 102 flow [2023-11-26 11:45:06,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-11-26 11:45:06,012 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-26 11:45:06,013 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 102 flow [2023-11-26 11:45:06,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:06,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:06,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:45:06,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:06,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash 836599556, now seen corresponding path program 1 times [2023-11-26 11:45:06,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:06,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269454989] [2023-11-26 11:45:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269454989] [2023-11-26 11:45:06,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269454989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:06,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:06,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310269177] [2023-11-26 11:45:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:06,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:06,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:06,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2023-11-26 11:45:06,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:06,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:06,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:06,368 INFO L124 PetriNetUnfolderBase]: 315/619 cut-off events. [2023-11-26 11:45:06,369 INFO L125 PetriNetUnfolderBase]: For 80/87 co-relation queries the response was YES. [2023-11-26 11:45:06,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 619 events. 315/619 cut-off events. For 80/87 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2979 event pairs, 254 based on Foata normal form. 12/582 useless extension candidates. Maximal degree in co-relation 1115. Up to 448 conditions per place. [2023-11-26 11:45:06,374 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 26 selfloop transitions, 2 changer transitions 18/52 dead transitions. [2023-11-26 11:45:06,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 250 flow [2023-11-26 11:45:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:45:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2023-11-26 11:45:06,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703125 [2023-11-26 11:45:06,376 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2023-11-26 11:45:06,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2023-11-26 11:45:06,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:06,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2023-11-26 11:45:06,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:06,379 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 102 flow. Second operand 4 states and 73 transitions. [2023-11-26 11:45:06,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 250 flow [2023-11-26 11:45:06,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:06,410 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 114 flow [2023-11-26 11:45:06,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-26 11:45:06,411 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-11-26 11:45:06,411 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 114 flow [2023-11-26 11:45:06,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2023-11-26 11:45:06,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:06,412 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] [2023-11-26 11:45:06,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:45:06,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:06,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1987658203, now seen corresponding path program 1 times [2023-11-26 11:45:06,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:06,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457713310] [2023-11-26 11:45:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:06,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:07,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457713310] [2023-11-26 11:45:07,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457713310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:07,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792534110] [2023-11-26 11:45:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:07,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:07,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 11:45:08,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:08,960 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-26 11:45:08,961 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 34 treesize of output 10 [2023-11-26 11:45:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:09,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:10,299 INFO L349 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2023-11-26 11:45:10,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 99 [2023-11-26 11:45:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:10,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792534110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:10,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:10,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2023-11-26 11:45:10,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169770634] [2023-11-26 11:45:10,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 11:45:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 11:45:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 11:45:10,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-26 11:45:10,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 114 flow. Second operand has 33 states, 33 states have (on average 7.2727272727272725) internal successors, (240), 33 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:10,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:10,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-26 11:45:10,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:19,687 INFO L124 PetriNetUnfolderBase]: 1528/2673 cut-off events. [2023-11-26 11:45:19,688 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2023-11-26 11:45:19,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6277 conditions, 2673 events. 1528/2673 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 13570 event pairs, 68 based on Foata normal form. 9/2348 useless extension candidates. Maximal degree in co-relation 6259. Up to 444 conditions per place. [2023-11-26 11:45:19,709 INFO L140 encePairwiseOnDemand]: 13/32 looper letters, 251 selfloop transitions, 133 changer transitions 135/522 dead transitions. [2023-11-26 11:45:19,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 522 transitions, 2484 flow [2023-11-26 11:45:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-26 11:45:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-26 11:45:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 857 transitions. [2023-11-26 11:45:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772007042253521 [2023-11-26 11:45:19,720 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 857 transitions. [2023-11-26 11:45:19,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 857 transitions. [2023-11-26 11:45:19,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:19,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 857 transitions. [2023-11-26 11:45:19,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 12.070422535211268) internal successors, (857), 71 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:19,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 32.0) internal successors, (2304), 72 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 32.0) internal successors, (2304), 72 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:19,735 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 114 flow. Second operand 71 states and 857 transitions. [2023-11-26 11:45:19,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 522 transitions, 2484 flow [2023-11-26 11:45:19,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 522 transitions, 2476 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 11:45:19,752 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 1226 flow [2023-11-26 11:45:19,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1226, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2023-11-26 11:45:19,756 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 119 predicate places. [2023-11-26 11:45:19,756 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 1226 flow [2023-11-26 11:45:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.2727272727272725) internal successors, (240), 33 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:19,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:19,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:19,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:45:19,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:19,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 163415978, now seen corresponding path program 2 times [2023-11-26 11:45:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:19,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590395918] [2023-11-26 11:45:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:20,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590395918] [2023-11-26 11:45:20,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590395918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:20,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061116237] [2023-11-26 11:45:20,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:45:20,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:20,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:20,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:20,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:20,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:45:20,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:20,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:45:20,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:20,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:45:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061116237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:20,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:20,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-11-26 11:45:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353880277] [2023-11-26 11:45:20,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 1226 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:20,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:21,079 INFO L124 PetriNetUnfolderBase]: 1183/2286 cut-off events. [2023-11-26 11:45:21,079 INFO L125 PetriNetUnfolderBase]: For 22033/22105 co-relation queries the response was YES. [2023-11-26 11:45:21,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11171 conditions, 2286 events. 1183/2286 cut-off events. For 22033/22105 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12607 event pairs, 212 based on Foata normal form. 54/2240 useless extension candidates. Maximal degree in co-relation 9211. Up to 906 conditions per place. [2023-11-26 11:45:21,115 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 283 selfloop transitions, 38 changer transitions 5/341 dead transitions. [2023-11-26 11:45:21,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 341 transitions, 2934 flow [2023-11-26 11:45:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:45:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2023-11-26 11:45:21,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6953125 [2023-11-26 11:45:21,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 89 transitions. [2023-11-26 11:45:21,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 89 transitions. [2023-11-26 11:45:21,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:21,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 89 transitions. [2023-11-26 11:45:21,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:21,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:21,118 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:21,118 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 1226 flow. Second operand 4 states and 89 transitions. [2023-11-26 11:45:21,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 341 transitions, 2934 flow [2023-11-26 11:45:21,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 341 transitions, 2516 flow, removed 203 selfloop flow, removed 16 redundant places. [2023-11-26 11:45:21,299 INFO L231 Difference]: Finished difference. Result has 126 places, 216 transitions, 1397 flow [2023-11-26 11:45:21,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1397, PETRI_PLACES=126, PETRI_TRANSITIONS=216} [2023-11-26 11:45:21,300 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2023-11-26 11:45:21,300 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 216 transitions, 1397 flow [2023-11-26 11:45:21,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:21,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:21,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:21,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:45:21,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:45:21,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:21,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 985827424, now seen corresponding path program 3 times [2023-11-26 11:45:21,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:21,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184505243] [2023-11-26 11:45:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:21,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184505243] [2023-11-26 11:45:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184505243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:21,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072982662] [2023-11-26 11:45:21,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:45:21,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:21,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:21,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:21,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:45:22,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:45:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:22,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:45:22,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:45:22,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:22,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072982662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:22,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:45:22,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-26 11:45:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79007178] [2023-11-26 11:45:22,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:22,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:45:22,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2023-11-26 11:45:22,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 216 transitions, 1397 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:22,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:22,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2023-11-26 11:45:22,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:23,310 INFO L124 PetriNetUnfolderBase]: 2765/4997 cut-off events. [2023-11-26 11:45:23,311 INFO L125 PetriNetUnfolderBase]: For 21190/21192 co-relation queries the response was YES. [2023-11-26 11:45:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21108 conditions, 4997 events. 2765/4997 cut-off events. For 21190/21192 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 30187 event pairs, 332 based on Foata normal form. 44/4881 useless extension candidates. Maximal degree in co-relation 17462. Up to 1451 conditions per place. [2023-11-26 11:45:23,380 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 385 selfloop transitions, 59 changer transitions 1/453 dead transitions. [2023-11-26 11:45:23,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 453 transitions, 3899 flow [2023-11-26 11:45:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2023-11-26 11:45:23,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2023-11-26 11:45:23,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 82 transitions. [2023-11-26 11:45:23,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 82 transitions. [2023-11-26 11:45:23,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:23,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 82 transitions. [2023-11-26 11:45:23,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:23,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:23,384 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:23,384 INFO L175 Difference]: Start difference. First operand has 126 places, 216 transitions, 1397 flow. Second operand 5 states and 82 transitions. [2023-11-26 11:45:23,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 453 transitions, 3899 flow [2023-11-26 11:45:23,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 453 transitions, 3891 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-26 11:45:23,508 INFO L231 Difference]: Finished difference. Result has 133 places, 247 transitions, 1811 flow [2023-11-26 11:45:23,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1811, PETRI_PLACES=133, PETRI_TRANSITIONS=247} [2023-11-26 11:45:23,513 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2023-11-26 11:45:23,513 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 247 transitions, 1811 flow [2023-11-26 11:45:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:23,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:23,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:23,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:23,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:23,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:23,721 INFO L85 PathProgramCache]: Analyzing trace with hash 500830820, now seen corresponding path program 4 times [2023-11-26 11:45:23,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:23,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367793038] [2023-11-26 11:45:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:45:23,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367793038] [2023-11-26 11:45:23,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367793038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804350111] [2023-11-26 11:45:23,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:45:23,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:23,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:23,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:24,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:45:24,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:45:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:24,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:45:24,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:45:24,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:45:24,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804350111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:24,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:24,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 11:45:24,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177677567] [2023-11-26 11:45:24,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:24,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:45:24,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:24,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:45:24,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:45:24,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:24,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 247 transitions, 1811 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:24,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:24,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:24,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:25,141 INFO L124 PetriNetUnfolderBase]: 1331/2589 cut-off events. [2023-11-26 11:45:25,141 INFO L125 PetriNetUnfolderBase]: For 16577/16719 co-relation queries the response was YES. [2023-11-26 11:45:25,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12122 conditions, 2589 events. 1331/2589 cut-off events. For 16577/16719 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14247 event pairs, 611 based on Foata normal form. 37/2500 useless extension candidates. Maximal degree in co-relation 9579. Up to 1731 conditions per place. [2023-11-26 11:45:25,206 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 69 selfloop transitions, 3 changer transitions 78/159 dead transitions. [2023-11-26 11:45:25,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 159 transitions, 1494 flow [2023-11-26 11:45:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:45:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2023-11-26 11:45:25,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2023-11-26 11:45:25,208 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 99 transitions. [2023-11-26 11:45:25,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 99 transitions. [2023-11-26 11:45:25,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:25,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 99 transitions. [2023-11-26 11:45:25,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:25,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:25,210 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:25,210 INFO L175 Difference]: Start difference. First operand has 133 places, 247 transitions, 1811 flow. Second operand 6 states and 99 transitions. [2023-11-26 11:45:25,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 159 transitions, 1494 flow [2023-11-26 11:45:25,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1402 flow, removed 42 selfloop flow, removed 13 redundant places. [2023-11-26 11:45:25,273 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 526 flow [2023-11-26 11:45:25,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2023-11-26 11:45:25,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2023-11-26 11:45:25,276 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 526 flow [2023-11-26 11:45:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:25,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:25,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:25,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:45:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:25,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:25,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1868565183, now seen corresponding path program 5 times [2023-11-26 11:45:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:25,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464007617] [2023-11-26 11:45:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:25,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:25,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464007617] [2023-11-26 11:45:25,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464007617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:25,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583297192] [2023-11-26 11:45:25,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:45:25,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:25,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:25,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:25,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:45:25,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:45:25,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:25,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:45:25,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:25,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583297192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:26,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:26,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-26 11:45:26,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694749352] [2023-11-26 11:45:26,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:26,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:45:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:26,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:45:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:45:26,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2023-11-26 11:45:26,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 526 flow. Second operand has 15 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:26,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:26,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2023-11-26 11:45:26,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:26,692 INFO L124 PetriNetUnfolderBase]: 1126/2164 cut-off events. [2023-11-26 11:45:26,692 INFO L125 PetriNetUnfolderBase]: For 6557/6703 co-relation queries the response was YES. [2023-11-26 11:45:26,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8633 conditions, 2164 events. 1126/2164 cut-off events. For 6557/6703 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 11495 event pairs, 190 based on Foata normal form. 48/2101 useless extension candidates. Maximal degree in co-relation 8587. Up to 1251 conditions per place. [2023-11-26 11:45:26,720 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 89 selfloop transitions, 7 changer transitions 22/127 dead transitions. [2023-11-26 11:45:26,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1027 flow [2023-11-26 11:45:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:45:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2023-11-26 11:45:26,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-11-26 11:45:26,722 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 136 transitions. [2023-11-26 11:45:26,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 136 transitions. [2023-11-26 11:45:26,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:26,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 136 transitions. [2023-11-26 11:45:26,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:26,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:26,727 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:26,727 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 526 flow. Second operand 9 states and 136 transitions. [2023-11-26 11:45:26,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1027 flow [2023-11-26 11:45:26,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 127 transitions, 946 flow, removed 36 selfloop flow, removed 19 redundant places. [2023-11-26 11:45:26,756 INFO L231 Difference]: Finished difference. Result has 68 places, 82 transitions, 508 flow [2023-11-26 11:45:26,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=508, PETRI_PLACES=68, PETRI_TRANSITIONS=82} [2023-11-26 11:45:26,757 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2023-11-26 11:45:26,757 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 82 transitions, 508 flow [2023-11-26 11:45:26,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:26,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:26,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:26,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:45:26,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash -428409131, now seen corresponding path program 6 times [2023-11-26 11:45:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:26,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164928317] [2023-11-26 11:45:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:29,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:29,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164928317] [2023-11-26 11:45:29,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164928317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:29,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080694906] [2023-11-26 11:45:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:45:29,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:29,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:29,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:29,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da28b20a-635e-4032-bcfc-67a0143dd3e6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:45:29,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:45:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:45:29,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-26 11:45:29,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:31,448 INFO L349 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-11-26 11:45:31,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 52 [2023-11-26 11:45:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:31,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:36,592 INFO L349 Elim1Store]: treesize reduction 144, result has 87.7 percent of original size [2023-11-26 11:45:36,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 233 treesize of output 1086