./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --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_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/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_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/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_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:04,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:04,686 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:49:04,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:04,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:04,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:04,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:04,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:04,738 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:04,743 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:04,744 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:04,744 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:04,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:04,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:04,749 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:04,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:04,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:49:04,751 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:04,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:04,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:04,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:04,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:49:04,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:04,754 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:49:04,754 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:04,755 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:49:04,755 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:04,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:04,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:04,757 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:04,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:04,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:04,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:04,760 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:04,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:49:04,760 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:04,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:04,761 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:04,761 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:04,761 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:49:04,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:04,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:04,762 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_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2023-11-26 10:49:05,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:05,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:05,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:05,106 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:05,107 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:05,108 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-11-26 10:49:08,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:08,562 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:08,562 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2023-11-26 10:49:08,584 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/data/f1813248a/947fdd2e413647aea01f5cbdc9c8e5d5/FLAG63b999c4d [2023-11-26 10:49:08,599 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/data/f1813248a/947fdd2e413647aea01f5cbdc9c8e5d5 [2023-11-26 10:49:08,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:08,604 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:08,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:08,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:08,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:08,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:08" (1/1) ... [2023-11-26 10:49:08,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b54b506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:08, skipping insertion in model container [2023-11-26 10:49:08,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:08" (1/1) ... [2023-11-26 10:49:08,668 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:09,364 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_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-11-26 10:49:09,385 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,385 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,386 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,388 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:09,473 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:09,538 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_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2023-11-26 10:49:09,544 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,544 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,545 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,545 WARN L1590 CHandler]: Possible shadowing of function new [2023-11-26 10:49:09,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:09,673 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:09,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09 WrapperNode [2023-11-26 10:49:09,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:09,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:09,675 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:09,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:09,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,784 INFO L138 Inliner]: procedures = 280, calls = 55, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 243 [2023-11-26 10:49:09,785 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:09,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:09,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:09,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:09,799 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,858 INFO L175 MemorySlicer]: Split 30 memory accesses to 4 slices as follows [2, 5, 21, 2]. 70 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 14 writes are split as follows [0, 0, 13, 1]. [2023-11-26 10:49:09,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,866 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,897 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:09,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:09,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:09,904 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:09,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:09,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:09,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:49:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:49:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 10:49:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 10:49:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-26 10:49:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:49:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:49:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:49:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:49:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:49:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:49:09,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:49:10,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:49:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:49:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:49:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:49:10,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:49:10,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:49:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 10:49:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 10:49:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-26 10:49:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 10:49:10,007 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 10:49:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:49:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:49:10,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:49:10,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:10,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:10,014 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:49:10,251 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:10,253 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:10,724 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:11,191 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:11,191 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-26 10:49:11,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:11 BoogieIcfgContainer [2023-11-26 10:49:11,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:11,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:11,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:11,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:11,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:08" (1/3) ... [2023-11-26 10:49:11,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddda39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:11, skipping insertion in model container [2023-11-26 10:49:11,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (2/3) ... [2023-11-26 10:49:11,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddda39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:11, skipping insertion in model container [2023-11-26 10:49:11,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:11" (3/3) ... [2023-11-26 10:49:11,206 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2023-11-26 10:49:11,216 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:49:11,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:11,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:49:11,228 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:49:11,299 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-26 10:49:11,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 60 transitions, 127 flow [2023-11-26 10:49:11,412 INFO L124 PetriNetUnfolderBase]: 17/64 cut-off events. [2023-11-26 10:49:11,412 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:49:11,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 17/64 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 117 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-26 10:49:11,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 60 transitions, 127 flow [2023-11-26 10:49:11,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 58 transitions, 120 flow [2023-11-26 10:49:11,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:11,447 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;@7c7ea83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:11,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 10:49:11,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:49:11,458 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-26 10:49:11,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:49:11,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:11,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:49:11,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:11,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1285182039, now seen corresponding path program 1 times [2023-11-26 10:49:11,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581540045] [2023-11-26 10:49:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,842 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 10:49:11,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581540045] [2023-11-26 10:49:11,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581540045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:11,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850394755] [2023-11-26 10:49:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2023-11-26 10:49:11,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 58 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 10:49:11,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:11,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2023-11-26 10:49:11,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:12,260 INFO L124 PetriNetUnfolderBase]: 116/321 cut-off events. [2023-11-26 10:49:12,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:49:12,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 321 events. 116/321 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1311 event pairs, 95 based on Foata normal form. 42/305 useless extension candidates. Maximal degree in co-relation 531. Up to 237 conditions per place. [2023-11-26 10:49:12,268 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 33 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-26 10:49:12,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 174 flow [2023-11-26 10:49:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-26 10:49:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-26 10:49:12,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-26 10:49:12,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-26 10:49:12,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:12,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-26 10:49:12,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 10:49:12,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 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 10:49:12,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 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 10:49:12,303 INFO L175 Difference]: Start difference. First operand has 45 places, 58 transitions, 120 flow. Second operand 3 states and 92 transitions. [2023-11-26 10:49:12,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 174 flow [2023-11-26 10:49:12,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:49:12,314 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 110 flow [2023-11-26 10:49:12,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-11-26 10:49:12,322 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-26 10:49:12,322 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 110 flow [2023-11-26 10:49:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 10:49:12,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:12,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:49:12,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:12,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -258319324, now seen corresponding path program 1 times [2023-11-26 10:49:12,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816713926] [2023-11-26 10:49:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:49:12,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816713926] [2023-11-26 10:49:12,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816713926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:12,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392371211] [2023-11-26 10:49:12,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:12,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:12,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2023-11-26 10:49:12,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:12,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:12,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2023-11-26 10:49:12,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:12,747 INFO L124 PetriNetUnfolderBase]: 116/323 cut-off events. [2023-11-26 10:49:12,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:49:12,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 323 events. 116/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1312 event pairs, 95 based on Foata normal form. 2/270 useless extension candidates. Maximal degree in co-relation 558. Up to 240 conditions per place. [2023-11-26 10:49:12,751 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 32 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-26 10:49:12,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 180 flow [2023-11-26 10:49:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:49:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-26 10:49:12,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2023-11-26 10:49:12,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-26 10:49:12,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-26 10:49:12,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:12,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-26 10:49:12,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 10:49:12,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 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 10:49:12,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 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 10:49:12,764 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 110 flow. Second operand 3 states and 79 transitions. [2023-11-26 10:49:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 180 flow [2023-11-26 10:49:12,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:12,767 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 122 flow [2023-11-26 10:49:12,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-11-26 10:49:12,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-11-26 10:49:12,769 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 122 flow [2023-11-26 10:49:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:12,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:12,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:49:12,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:12,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash -533945611, now seen corresponding path program 1 times [2023-11-26 10:49:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048607419] [2023-11-26 10:49:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211902352] [2023-11-26 10:49:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:12,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:12,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:13,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:49:13,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:49:13,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:13,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048607419] [2023-11-26 10:49:13,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:13,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211902352] [2023-11-26 10:49:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211902352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:13,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-26 10:49:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993061799] [2023-11-26 10:49:13,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:13,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2023-11-26 10:49:13,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:13,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:13,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2023-11-26 10:49:13,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:13,545 INFO L124 PetriNetUnfolderBase]: 116/329 cut-off events. [2023-11-26 10:49:13,545 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:49:13,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 329 events. 116/329 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1327 event pairs, 95 based on Foata normal form. 6/280 useless extension candidates. Maximal degree in co-relation 565. Up to 240 conditions per place. [2023-11-26 10:49:13,551 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 32 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-11-26 10:49:13,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 52 transitions, 208 flow [2023-11-26 10:49:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:49:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2023-11-26 10:49:13,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2023-11-26 10:49:13,558 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 129 transitions. [2023-11-26 10:49:13,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 129 transitions. [2023-11-26 10:49:13,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:13,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 129 transitions. [2023-11-26 10:49:13,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 10:49:13,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 10:49:13,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 10:49:13,563 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 122 flow. Second operand 6 states and 129 transitions. [2023-11-26 10:49:13,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 52 transitions, 208 flow [2023-11-26 10:49:13,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:13,568 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 160 flow [2023-11-26 10:49:13,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-26 10:49:13,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-11-26 10:49:13,570 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 160 flow [2023-11-26 10:49:13,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:13,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:13,571 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:13,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 10:49:13,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:13,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1717438564, now seen corresponding path program 2 times [2023-11-26 10:49:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:13,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569664265] [2023-11-26 10:49:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:13,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:13,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821277153] [2023-11-26 10:49:13,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:13,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:13,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:13,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:13,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:14,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:14,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:14,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:49:14,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:49:14,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:49:14,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:14,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569664265] [2023-11-26 10:49:14,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:14,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821277153] [2023-11-26 10:49:14,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821277153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:14,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:14,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-26 10:49:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080078014] [2023-11-26 10:49:14,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:14,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:49:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:49:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:49:14,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2023-11-26 10:49:14,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 10:49:14,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:14,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2023-11-26 10:49:14,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:15,633 INFO L124 PetriNetUnfolderBase]: 116/341 cut-off events. [2023-11-26 10:49:15,634 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-26 10:49:15,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 341 events. 116/341 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1381 event pairs, 95 based on Foata normal form. 12/298 useless extension candidates. Maximal degree in co-relation 561. Up to 240 conditions per place. [2023-11-26 10:49:15,644 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 32 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2023-11-26 10:49:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 58 transitions, 282 flow [2023-11-26 10:49:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:49:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:49:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2023-11-26 10:49:15,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2023-11-26 10:49:15,648 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 228 transitions. [2023-11-26 10:49:15,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 228 transitions. [2023-11-26 10:49:15,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:15,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 228 transitions. [2023-11-26 10:49:15,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 10:49:15,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 60.0) internal successors, (780), 13 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 10:49:15,656 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 60.0) internal successors, (780), 13 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 10:49:15,656 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 160 flow. Second operand 12 states and 228 transitions. [2023-11-26 10:49:15,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 58 transitions, 282 flow [2023-11-26 10:49:15,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 268 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:15,664 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 242 flow [2023-11-26 10:49:15,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=242, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-11-26 10:49:15,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2023-11-26 10:49:15,667 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 242 flow [2023-11-26 10:49:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 10:49:15,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:15,668 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:15,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:15,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:15,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:15,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1219604796, now seen corresponding path program 3 times [2023-11-26 10:49:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989377747] [2023-11-26 10:49:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:16,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:16,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045926602] [2023-11-26 10:49:16,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:49:16,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:16,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:16,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 10:49:16,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:16,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:16,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:49:16,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:49:16,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:16,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989377747] [2023-11-26 10:49:16,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:16,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045926602] [2023-11-26 10:49:16,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045926602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:16,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:16,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-26 10:49:16,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467910872] [2023-11-26 10:49:16,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:16,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:49:16,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:49:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:49:16,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2023-11-26 10:49:16,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 10:49:16,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:16,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2023-11-26 10:49:16,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:17,054 INFO L124 PetriNetUnfolderBase]: 118/368 cut-off events. [2023-11-26 10:49:17,055 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-11-26 10:49:17,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 368 events. 118/368 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1311 event pairs, 95 based on Foata normal form. 3/316 useless extension candidates. Maximal degree in co-relation 562. Up to 234 conditions per place. [2023-11-26 10:49:17,058 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 76 selfloop transitions, 6 changer transitions 0/97 dead transitions. [2023-11-26 10:49:17,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 755 flow [2023-11-26 10:49:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:49:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2023-11-26 10:49:17,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-26 10:49:17,060 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 135 transitions. [2023-11-26 10:49:17,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 135 transitions. [2023-11-26 10:49:17,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:17,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 135 transitions. [2023-11-26 10:49:17,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:17,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 10:49:17,063 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 10:49:17,063 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 242 flow. Second operand 6 states and 135 transitions. [2023-11-26 10:49:17,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 755 flow [2023-11-26 10:49:17,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 97 transitions, 561 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-11-26 10:49:17,071 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 277 flow [2023-11-26 10:49:17,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2023-11-26 10:49:17,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2023-11-26 10:49:17,073 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 277 flow [2023-11-26 10:49:17,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 10:49:17,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:17,073 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-26 10:49:17,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:17,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:17,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash 731766539, now seen corresponding path program 4 times [2023-11-26 10:49:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:17,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911935218] [2023-11-26 10:49:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:18,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:18,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986365869] [2023-11-26 10:49:18,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:49:18,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:18,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:18,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:20,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:49:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:20,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 3632 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 10:49:20,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-26 10:49:20,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-11-26 10:49:20,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:20,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911935218] [2023-11-26 10:49:20,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:49:20,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986365869] [2023-11-26 10:49:20,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986365869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:20,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:49:20,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-26 10:49:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043076337] [2023-11-26 10:49:20,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:49:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:49:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:49:20,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2023-11-26 10:49:20,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 277 flow. Second operand has 24 states, 24 states have (on average 16.333333333333332) internal successors, (392), 24 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:49:20,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:49:20,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2023-11-26 10:49:20,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:49:22,027 INFO L124 PetriNetUnfolderBase]: 118/416 cut-off events. [2023-11-26 10:49:22,027 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-11-26 10:49:22,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 416 events. 118/416 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1309 event pairs, 95 based on Foata normal form. 48/409 useless extension candidates. Maximal degree in co-relation 567. Up to 246 conditions per place. [2023-11-26 10:49:22,031 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 34 selfloop transitions, 24 changer transitions 0/73 dead transitions. [2023-11-26 10:49:22,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 73 transitions, 465 flow [2023-11-26 10:49:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 10:49:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 10:49:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 426 transitions. [2023-11-26 10:49:22,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29583333333333334 [2023-11-26 10:49:22,035 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 426 transitions. [2023-11-26 10:49:22,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 426 transitions. [2023-11-26 10:49:22,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:49:22,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 426 transitions. [2023-11-26 10:49:22,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 17.75) internal successors, (426), 24 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 10:49:22,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 60.0) internal successors, (1500), 25 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 10:49:22,041 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 60.0) internal successors, (1500), 25 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 10:49:22,041 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 277 flow. Second operand 24 states and 426 transitions. [2023-11-26 10:49:22,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 73 transitions, 465 flow [2023-11-26 10:49:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 73 transitions, 457 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-26 10:49:22,047 INFO L231 Difference]: Finished difference. Result has 111 places, 73 transitions, 511 flow [2023-11-26 10:49:22,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=511, PETRI_PLACES=111, PETRI_TRANSITIONS=73} [2023-11-26 10:49:22,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2023-11-26 10:49:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 73 transitions, 511 flow [2023-11-26 10:49:22,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 16.333333333333332) internal successors, (392), 24 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:49:22,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:49:22,050 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-11-26 10:49:22,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:22,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:22,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash -689156853, now seen corresponding path program 5 times [2023-11-26 10:49:22,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793015858] [2023-11-26 10:49:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:23,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:49:23,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246612524] [2023-11-26 10:49:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:49:23,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:23,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:23,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:23,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498f8ae9-e8b1-47b2-996f-8e7da76d9d6e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process