./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya --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 b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:28:17,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:28:17,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:28:17,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:28:17,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:28:17,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:28:17,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:28:17,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:28:17,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:28:17,825 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:28:17,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:28:17,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:28:17,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:28:17,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:28:17,828 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:28:17,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:28:17,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:28:17,829 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:28:17,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:28:17,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:28:17,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:28:17,831 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:28:17,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:28:17,832 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:28:17,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:28:17,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:28:17,833 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:28:17,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:28:17,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:28:17,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:28:17,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:28:17,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:28:17,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:28:17,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:28:17,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:28:17,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:28:17,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:28:17,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:28:17,838 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:28:17,838 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:28:17,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:28:17,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:28:17,838 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_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 [2023-11-29 02:28:18,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:28:18,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:28:18,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:28:18,083 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:28:18,084 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:28:18,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-29 02:28:20,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:28:21,049 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:28:21,050 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-29 02:28:21,066 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/data/dc53e6c3f/c3aab06e9da5423d802430e6c5801971/FLAG67791a4e3 [2023-11-29 02:28:21,078 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/data/dc53e6c3f/c3aab06e9da5423d802430e6c5801971 [2023-11-29 02:28:21,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:28:21,082 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:28:21,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:28:21,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:28:21,088 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:28:21,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4380866f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21, skipping insertion in model container [2023-11-29 02:28:21,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,142 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:28:21,562 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_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2023-11-29 02:28:21,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:28:21,597 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:28:21,636 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_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2023-11-29 02:28:21,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:28:21,714 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:28:21,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21 WrapperNode [2023-11-29 02:28:21,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:28:21,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:28:21,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:28:21,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:28:21,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,767 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-29 02:28:21,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:28:21,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:28:21,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:28:21,769 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:28:21,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,813 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2023-11-29 02:28:21,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,814 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:28:21,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:28:21,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:28:21,836 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:28:21,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (1/1) ... [2023-11-29 02:28:21,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:28:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:21,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:28:21,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:28:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:28:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:28:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 02:28:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:28:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 02:28:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:28:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 02:28:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 02:28:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:28:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:28:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:28:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:28:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:28:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:28:21,906 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:28:22,049 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:28:22,051 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:28:22,240 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:28:22,385 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:28:22,385 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 02:28:22,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:28:22 BoogieIcfgContainer [2023-11-29 02:28:22,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:28:22,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:28:22,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:28:22,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:28:22,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:28:21" (1/3) ... [2023-11-29 02:28:22,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71747469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:28:22, skipping insertion in model container [2023-11-29 02:28:22,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:28:21" (2/3) ... [2023-11-29 02:28:22,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71747469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:28:22, skipping insertion in model container [2023-11-29 02:28:22,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:28:22" (3/3) ... [2023-11-29 02:28:22,395 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2023-11-29 02:28:22,403 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:28:22,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:28:22,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:28:22,414 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:28:22,451 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 02:28:22,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 58 transitions, 123 flow [2023-11-29 02:28:22,524 INFO L124 PetriNetUnfolderBase]: 19/87 cut-off events. [2023-11-29 02:28:22,524 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:28:22,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 87 events. 19/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 299 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-11-29 02:28:22,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 58 transitions, 123 flow [2023-11-29 02:28:22,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 56 transitions, 116 flow [2023-11-29 02:28:22,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:28:22,551 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;@63b5feb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:28:22,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 02:28:22,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:28:22,558 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-11-29 02:28:22,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:28:22,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:22,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 02:28:22,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:28:22,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1312290786, now seen corresponding path program 1 times [2023-11-29 02:28:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707078045] [2023-11-29 02:28:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:28:22,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:28:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:28:22,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:28:22,753 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:28:22,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 02:28:22,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 02:28:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:28:22,757 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 02:28:22,761 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:28:22,761 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 02:28:22,787 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:28:22,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 83 transitions, 182 flow [2023-11-29 02:28:22,850 INFO L124 PetriNetUnfolderBase]: 33/148 cut-off events. [2023-11-29 02:28:22,851 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 02:28:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 148 events. 33/148 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 617 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 91. Up to 9 conditions per place. [2023-11-29 02:28:22,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 83 transitions, 182 flow [2023-11-29 02:28:22,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 83 transitions, 182 flow [2023-11-29 02:28:22,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:28:22,859 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;@63b5feb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:28:22,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 02:28:22,871 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:28:22,871 INFO L124 PetriNetUnfolderBase]: 8/55 cut-off events. [2023-11-29 02:28:22,871 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:28:22,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:22,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-29 02:28:22,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:28:22,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:22,873 INFO L85 PathProgramCache]: Analyzing trace with hash -690334808, now seen corresponding path program 1 times [2023-11-29 02:28:22,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:22,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391333394] [2023-11-29 02:28:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:22,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:28:22,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:28:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:28:22,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:28:22,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:28:22,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 02:28:22,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 02:28:22,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:28:22,944 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-29 02:28:22,945 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:28:22,945 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 02:28:22,972 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 02:28:22,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 108 transitions, 243 flow [2023-11-29 02:28:23,009 INFO L124 PetriNetUnfolderBase]: 50/220 cut-off events. [2023-11-29 02:28:23,009 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 02:28:23,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 220 events. 50/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 976 event pairs, 1 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2023-11-29 02:28:23,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 108 transitions, 243 flow [2023-11-29 02:28:23,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 108 transitions, 243 flow [2023-11-29 02:28:23,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:28:23,019 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;@63b5feb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:28:23,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 02:28:23,026 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:28:23,026 INFO L124 PetriNetUnfolderBase]: 8/60 cut-off events. [2023-11-29 02:28:23,026 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 02:28:23,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:23,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:28:23,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:28:23,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1201360833, now seen corresponding path program 1 times [2023-11-29 02:28:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:23,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429251852] [2023-11-29 02:28:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:23,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:28:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:23,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429251852] [2023-11-29 02:28:23,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429251852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:28:23,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:28:23,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:28:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97057894] [2023-11-29 02:28:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:28:23,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:28:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:28:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:28:23,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 108 [2023-11-29 02:28:23,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2023-11-29 02:28:23,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:28:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 108 [2023-11-29 02:28:23,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:28:28,957 INFO L124 PetriNetUnfolderBase]: 38832/63236 cut-off events. [2023-11-29 02:28:28,957 INFO L125 PetriNetUnfolderBase]: For 1141/1141 co-relation queries the response was YES. [2023-11-29 02:28:29,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117141 conditions, 63236 events. 38832/63236 cut-off events. For 1141/1141 co-relation queries the response was YES. Maximal size of possible extension queue 2279. Compared 564069 event pairs, 35482 based on Foata normal form. 17852/75336 useless extension candidates. Maximal degree in co-relation 67904. Up to 53094 conditions per place. [2023-11-29 02:28:29,397 INFO L140 encePairwiseOnDemand]: 84/108 looper letters, 52 selfloop transitions, 2 changer transitions 3/98 dead transitions. [2023-11-29 02:28:29,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 98 transitions, 337 flow [2023-11-29 02:28:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:28:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:28:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-11-29 02:28:29,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2023-11-29 02:28:29,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-11-29 02:28:29,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-11-29 02:28:29,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:28:29,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-11-29 02:28:29,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-11-29 02:28:29,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:28:29,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:28:29,423 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 243 flow. Second operand 3 states and 208 transitions. [2023-11-29 02:28:29,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 98 transitions, 337 flow [2023-11-29 02:28:29,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:28:29,435 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 201 flow [2023-11-29 02:28:29,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-11-29 02:28:29,440 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-11-29 02:28:29,440 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 201 flow [2023-11-29 02:28:29,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2023-11-29 02:28:29,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:29,441 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-29 02:28:29,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:28:29,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:28:29,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash -367010243, now seen corresponding path program 1 times [2023-11-29 02:28:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:29,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78062652] [2023-11-29 02:28:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:28:29,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:28:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:28:29,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:28:29,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:28:29,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 02:28:29,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 02:28:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:28:29,503 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 02:28:29,504 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 02:28:29,504 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 02:28:29,540 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 02:28:29,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 133 transitions, 306 flow [2023-11-29 02:28:29,579 INFO L124 PetriNetUnfolderBase]: 75/316 cut-off events. [2023-11-29 02:28:29,579 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 02:28:29,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 316 events. 75/316 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1454 event pairs, 6 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 244. Up to 32 conditions per place. [2023-11-29 02:28:29,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 133 transitions, 306 flow [2023-11-29 02:28:29,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 133 transitions, 306 flow [2023-11-29 02:28:29,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:28:29,587 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;@63b5feb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:28:29,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 02:28:29,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:28:29,593 INFO L124 PetriNetUnfolderBase]: 8/60 cut-off events. [2023-11-29 02:28:29,593 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 02:28:29,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:28:29,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:28:29,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:28:29,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1387835962, now seen corresponding path program 1 times [2023-11-29 02:28:29,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:29,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898538989] [2023-11-29 02:28:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:28:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898538989] [2023-11-29 02:28:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898538989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:28:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:28:29,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:28:29,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554075400] [2023-11-29 02:28:29,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:28:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:28:29,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:28:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:28:29,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 133 [2023-11-29 02:28:29,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2023-11-29 02:28:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:28:29,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 133 [2023-11-29 02:28:29,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:29:33,516 INFO L124 PetriNetUnfolderBase]: 525533/767384 cut-off events. [2023-11-29 02:29:33,516 INFO L125 PetriNetUnfolderBase]: For 19065/19065 co-relation queries the response was YES. [2023-11-29 02:29:35,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1452592 conditions, 767384 events. 525533/767384 cut-off events. For 19065/19065 co-relation queries the response was YES. Maximal size of possible extension queue 21235. Compared 7407164 event pairs, 484067 based on Foata normal form. 241392/954251 useless extension candidates. Maximal degree in co-relation 425681. Up to 674435 conditions per place. [2023-11-29 02:29:37,535 INFO L140 encePairwiseOnDemand]: 103/133 looper letters, 64 selfloop transitions, 2 changer transitions 2/117 dead transitions. [2023-11-29 02:29:37,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 117 transitions, 410 flow [2023-11-29 02:29:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:29:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:29:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-11-29 02:29:37,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2023-11-29 02:29:37,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-11-29 02:29:37,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-11-29 02:29:37,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:29:37,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-11-29 02:29:37,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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) [2023-11-29 02:29:37,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2023-11-29 02:29:37,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2023-11-29 02:29:37,543 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 306 flow. Second operand 3 states and 249 transitions. [2023-11-29 02:29:37,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 117 transitions, 410 flow [2023-11-29 02:29:37,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 117 transitions, 410 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:29:37,568 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 257 flow [2023-11-29 02:29:37,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=111, PETRI_TRANSITIONS=105} [2023-11-29 02:29:37,570 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-11-29 02:29:37,570 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 257 flow [2023-11-29 02:29:37,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2023-11-29 02:29:37,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:29:37,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:29:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:29:37,571 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:29:37,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1839575460, now seen corresponding path program 1 times [2023-11-29 02:29:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:37,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063802098] [2023-11-29 02:29:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:29:37,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063802098] [2023-11-29 02:29:37,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063802098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:29:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941755109] [2023-11-29 02:29:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:37,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:37,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:37,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:37,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a874b03-d813-4d41-93d0-83b9b0ee5fb4/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:29:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:37,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:29:37,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:29:37,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:29:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941755109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:29:37,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:29:37,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 02:29:37,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989860462] [2023-11-29 02:29:37,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:29:37,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:29:37,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:29:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:29:37,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 133 [2023-11-29 02:29:37,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-11-29 02:29:37,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:29:37,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 133 [2023-11-29 02:29:37,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand