./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:02:39,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:02:39,660 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:02:39,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:02:39,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:02:39,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:02:39,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:02:39,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:02:39,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:02:39,722 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:02:39,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:02:39,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:02:39,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:02:39,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:02:39,727 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:02:39,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:02:39,731 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:02:39,732 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:02:39,732 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:02:39,733 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:02:39,733 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:02:39,737 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:02:39,738 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:02:39,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:02:39,738 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:02:39,739 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:02:39,739 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:02:39,740 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:02:39,740 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:02:39,740 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:02:39,741 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:02:39,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:02:39,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:02:39,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:39,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:02:39,747 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:02:39,747 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:02:39,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:02:39,748 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:02:39,748 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:02:39,748 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:02:39,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:02:39,752 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_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2024-10-31 22:02:40,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:02:40,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:02:40,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:02:40,163 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:02:40,163 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:02:40,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/unroll-2.wvr.c Unable to find full path for "g++" [2024-10-31 22:02:42,288 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:02:42,516 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:02:42,517 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/sv-benchmarks/c/weaver/unroll-2.wvr.c [2024-10-31 22:02:42,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/data/9b5a750b5/ffea7b4eb5884a6dbe8b36051b2b991b/FLAGcf1b5a025 [2024-10-31 22:02:42,543 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/data/9b5a750b5/ffea7b4eb5884a6dbe8b36051b2b991b [2024-10-31 22:02:42,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:02:42,547 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:02:42,548 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:42,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:02:42,558 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:02:42,559 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:42,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f40274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42, skipping insertion in model container [2024-10-31 22:02:42,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:42,585 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:02:42,897 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:02:42,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:42,910 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:02:42,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:42,963 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:02:42,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42 WrapperNode [2024-10-31 22:02:42,964 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:42,965 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:42,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:02:42,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:02:42,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:42,982 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,013 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 129 [2024-10-31 22:02:43,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:43,016 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:02:43,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:02:43,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:02:43,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,030 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,043 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:02:43,043 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,050 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,054 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:02:43,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:02:43,060 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:02:43,060 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:02:43,061 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (1/1) ... [2024-10-31 22:02:43,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:43,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:43,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:02:43,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:02:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:02:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:02:43,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:02:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:02:43,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:02:43,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:02:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:02:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:02:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:02:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:02:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:02:43,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:02:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:02:43,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:02:43,148 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:02:43,307 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:02:43,310 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:02:43,761 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:02:43,761 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:02:44,198 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:02:44,198 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:02:44,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:44 BoogieIcfgContainer [2024-10-31 22:02:44,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:02:44,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:02:44,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:02:44,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:02:44,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:02:42" (1/3) ... [2024-10-31 22:02:44,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de78619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:44, skipping insertion in model container [2024-10-31 22:02:44,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:42" (2/3) ... [2024-10-31 22:02:44,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de78619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:44, skipping insertion in model container [2024-10-31 22:02:44,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:44" (3/3) ... [2024-10-31 22:02:44,216 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2024-10-31 22:02:44,238 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:02:44,238 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-31 22:02:44,239 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:02:44,314 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:02:44,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 82 flow [2024-10-31 22:02:44,406 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-10-31 22:02:44,407 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:02:44,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 3/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-31 22:02:44,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 82 flow [2024-10-31 22:02:44,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 31 transitions, 74 flow [2024-10-31 22:02:44,435 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:02:44,445 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@17a8a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:02:44,446 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-31 22:02:44,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:02:44,456 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:02:44,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:44,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:44,457 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:02:44,460 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:44,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 443382, now seen corresponding path program 1 times [2024-10-31 22:02:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:44,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145223610] [2024-10-31 22:02:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:44,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:44,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145223610] [2024-10-31 22:02:44,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145223610] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:44,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:44,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574670411] [2024-10-31 22:02:44,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:44,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:44,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-31 22:02:44,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:44,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:44,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-31 22:02:44,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:45,075 INFO L124 PetriNetUnfolderBase]: 75/171 cut-off events. [2024-10-31 22:02:45,076 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:02:45,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 171 events. 75/171 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 632 event pairs, 53 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 276. Up to 131 conditions per place. [2024-10-31 22:02:45,081 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-10-31 22:02:45,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 108 flow [2024-10-31 22:02:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-10-31 22:02:45,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2024-10-31 22:02:45,105 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 74 flow. Second operand 3 states and 55 transitions. [2024-10-31 22:02:45,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 108 flow [2024-10-31 22:02:45,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:45,116 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 64 flow [2024-10-31 22:02:45,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-10-31 22:02:45,125 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-10-31 22:02:45,128 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 64 flow [2024-10-31 22:02:45,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:45,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:45,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:02:45,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:02:45,130 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:45,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash 443383, now seen corresponding path program 1 times [2024-10-31 22:02:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296418783] [2024-10-31 22:02:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:45,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:45,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296418783] [2024-10-31 22:02:45,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296418783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:45,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:45,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:02:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710370439] [2024-10-31 22:02:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:45,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:45,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:45,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-31 22:02:45,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:45,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:45,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-31 22:02:45,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:45,954 INFO L124 PetriNetUnfolderBase]: 75/173 cut-off events. [2024-10-31 22:02:45,958 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:02:45,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 173 events. 75/173 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 633 event pairs, 53 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 300. Up to 135 conditions per place. [2024-10-31 22:02:45,961 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 21 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-31 22:02:45,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 114 flow [2024-10-31 22:02:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-10-31 22:02:45,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-10-31 22:02:45,966 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 64 flow. Second operand 3 states and 58 transitions. [2024-10-31 22:02:45,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 114 flow [2024-10-31 22:02:45,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:45,968 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 74 flow [2024-10-31 22:02:45,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-31 22:02:45,970 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-31 22:02:45,970 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 74 flow [2024-10-31 22:02:45,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:45,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:45,972 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:02:45,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:02:45,973 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:45,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:45,975 INFO L85 PathProgramCache]: Analyzing trace with hash 426104879, now seen corresponding path program 1 times [2024-10-31 22:02:45,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:45,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225698593] [2024-10-31 22:02:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:46,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225698593] [2024-10-31 22:02:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225698593] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:46,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080286435] [2024-10-31 22:02:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:46,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:46,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:46,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:46,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:02:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:46,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:02:46,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:46,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:02:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:46,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080286435] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:47,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:47,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:02:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911572065] [2024-10-31 22:02:47,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:47,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:02:47,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:02:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:02:47,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-31 22:02:47,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 74 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:47,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:47,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-31 22:02:47,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:47,732 INFO L124 PetriNetUnfolderBase]: 75/172 cut-off events. [2024-10-31 22:02:47,732 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:02:47,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 172 events. 75/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 629 event pairs, 53 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 308. Up to 131 conditions per place. [2024-10-31 22:02:47,735 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 17 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2024-10-31 22:02:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 116 flow [2024-10-31 22:02:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-31 22:02:47,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-10-31 22:02:47,738 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 74 flow. Second operand 5 states and 78 transitions. [2024-10-31 22:02:47,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 116 flow [2024-10-31 22:02:47,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:47,741 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 86 flow [2024-10-31 22:02:47,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2024-10-31 22:02:47,742 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-10-31 22:02:47,743 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 86 flow [2024-10-31 22:02:47,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:47,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:47,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:47,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:02:47,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:47,945 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:47,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1830226261, now seen corresponding path program 1 times [2024-10-31 22:02:47,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665867278] [2024-10-31 22:02:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665867278] [2024-10-31 22:02:48,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665867278] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:48,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:48,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:48,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257135891] [2024-10-31 22:02:48,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:48,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:48,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:48,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-31 22:02:48,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:48,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:48,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-31 22:02:48,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:48,169 INFO L124 PetriNetUnfolderBase]: 75/154 cut-off events. [2024-10-31 22:02:48,171 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:02:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 154 events. 75/154 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 472 event pairs, 53 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 282. Up to 130 conditions per place. [2024-10-31 22:02:48,174 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 20 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2024-10-31 22:02:48,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 124 flow [2024-10-31 22:02:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-10-31 22:02:48,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40441176470588236 [2024-10-31 22:02:48,178 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 86 flow. Second operand 4 states and 55 transitions. [2024-10-31 22:02:48,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 124 flow [2024-10-31 22:02:48,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 114 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-31 22:02:48,182 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 74 flow [2024-10-31 22:02:48,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-10-31 22:02:48,183 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-31 22:02:48,185 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 74 flow [2024-10-31 22:02:48,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:48,185 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:48,185 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:48,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:02:48,186 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:48,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1830226260, now seen corresponding path program 1 times [2024-10-31 22:02:48,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:48,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340384839] [2024-10-31 22:02:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:48,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:48,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340384839] [2024-10-31 22:02:48,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340384839] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:48,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16028378] [2024-10-31 22:02:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:48,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:48,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:02:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:48,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:02:48,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:48,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:48,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-31 22:02:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16028378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:48,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-10-31 22:02:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119457836] [2024-10-31 22:02:48,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:48,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:02:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:02:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:02:49,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-31 22:02:49,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 74 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:49,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:49,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-31 22:02:49,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:49,453 INFO L124 PetriNetUnfolderBase]: 148/281 cut-off events. [2024-10-31 22:02:49,454 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:02:49,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 281 events. 148/281 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1056 event pairs, 53 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 541. Up to 141 conditions per place. [2024-10-31 22:02:49,459 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 33 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-31 22:02:49,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 179 flow [2024-10-31 22:02:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-10-31 22:02:49,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5470588235294118 [2024-10-31 22:02:49,464 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 74 flow. Second operand 5 states and 93 transitions. [2024-10-31 22:02:49,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 179 flow [2024-10-31 22:02:49,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:49,466 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 87 flow [2024-10-31 22:02:49,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-10-31 22:02:49,468 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2024-10-31 22:02:49,469 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 87 flow [2024-10-31 22:02:49,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:49,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:49,471 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:49,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:02:49,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:49,675 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:49,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2089169904, now seen corresponding path program 1 times [2024-10-31 22:02:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841674600] [2024-10-31 22:02:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:49,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:49,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841674600] [2024-10-31 22:02:49,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841674600] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817076067] [2024-10-31 22:02:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:49,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:49,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:49,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:49,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:02:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:02:50,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:50,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:50,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-10-31 22:02:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:50,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817076067] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:50,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:50,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-10-31 22:02:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197865588] [2024-10-31 22:02:50,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:50,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:02:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:02:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:02:50,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-31 22:02:50,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 87 flow. Second operand has 16 states, 16 states have (on average 12.8125) internal successors, (205), 16 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:50,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:50,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-31 22:02:50,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:51,420 INFO L124 PetriNetUnfolderBase]: 278/544 cut-off events. [2024-10-31 22:02:51,421 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-10-31 22:02:51,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 544 events. 278/544 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2473 event pairs, 170 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 603. Up to 261 conditions per place. [2024-10-31 22:02:51,429 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 56 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2024-10-31 22:02:51,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 324 flow [2024-10-31 22:02:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:02:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:02:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-10-31 22:02:51,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-31 22:02:51,436 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 87 flow. Second operand 8 states and 153 transitions. [2024-10-31 22:02:51,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 324 flow [2024-10-31 22:02:51,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:02:51,439 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 152 flow [2024-10-31 22:02:51,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2024-10-31 22:02:51,440 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2024-10-31 22:02:51,441 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 152 flow [2024-10-31 22:02:51,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.8125) internal successors, (205), 16 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:51,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:51,442 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:51,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:02:51,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:02:51,647 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:51,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2082229754, now seen corresponding path program 1 times [2024-10-31 22:02:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:51,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477419007] [2024-10-31 22:02:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:51,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477419007] [2024-10-31 22:02:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477419007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316022219] [2024-10-31 22:02:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:51,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:51,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:51,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:02:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:51,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:02:51,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:52,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:52,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-31 22:02:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316022219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:52,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:52,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-31 22:02:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367817719] [2024-10-31 22:02:52,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:52,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:02:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:52,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:02:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:02:52,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-31 22:02:52,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:52,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:52,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-31 22:02:52,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:52,511 INFO L124 PetriNetUnfolderBase]: 491/881 cut-off events. [2024-10-31 22:02:52,513 INFO L125 PetriNetUnfolderBase]: For 491/521 co-relation queries the response was YES. [2024-10-31 22:02:52,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 881 events. 491/881 cut-off events. For 491/521 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3997 event pairs, 162 based on Foata normal form. 0/753 useless extension candidates. Maximal degree in co-relation 1756. Up to 509 conditions per place. [2024-10-31 22:02:52,522 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-10-31 22:02:52,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 302 flow [2024-10-31 22:02:52,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-10-31 22:02:52,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5058823529411764 [2024-10-31 22:02:52,525 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 152 flow. Second operand 5 states and 86 transitions. [2024-10-31 22:02:52,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 302 flow [2024-10-31 22:02:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 296 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:52,531 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 167 flow [2024-10-31 22:02:52,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-10-31 22:02:52,532 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2024-10-31 22:02:52,532 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 167 flow [2024-10-31 22:02:52,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:52,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:52,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:52,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:02:52,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:02:52,734 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:52,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:52,735 INFO L85 PathProgramCache]: Analyzing trace with hash 124613397, now seen corresponding path program 1 times [2024-10-31 22:02:52,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:52,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663668889] [2024-10-31 22:02:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:52,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:52,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:52,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663668889] [2024-10-31 22:02:52,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663668889] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637181047] [2024-10-31 22:02:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:52,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:52,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:52,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:52,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:02:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:53,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:02:53,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:53,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:53,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-31 22:02:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:53,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637181047] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:53,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:53,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:02:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217379820] [2024-10-31 22:02:53,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:53,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:02:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:02:53,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:02:53,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-31 22:02:53,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 167 flow. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:53,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:53,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-31 22:02:53,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:53,956 INFO L124 PetriNetUnfolderBase]: 514/913 cut-off events. [2024-10-31 22:02:53,956 INFO L125 PetriNetUnfolderBase]: For 503/554 co-relation queries the response was YES. [2024-10-31 22:02:53,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 913 events. 514/913 cut-off events. For 503/554 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4093 event pairs, 288 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 1951. Up to 685 conditions per place. [2024-10-31 22:02:53,964 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 50 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-10-31 22:02:53,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 375 flow [2024-10-31 22:02:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:02:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:02:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-10-31 22:02:53,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-10-31 22:02:53,966 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 167 flow. Second operand 7 states and 120 transitions. [2024-10-31 22:02:53,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 375 flow [2024-10-31 22:02:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 60 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:02:53,973 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 192 flow [2024-10-31 22:02:53,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2024-10-31 22:02:53,975 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2024-10-31 22:02:53,976 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 192 flow [2024-10-31 22:02:53,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:53,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:53,977 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:53,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:02:54,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:54,178 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:54,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash 990539960, now seen corresponding path program 2 times [2024-10-31 22:02:54,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:54,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287009405] [2024-10-31 22:02:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:54,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:02:54,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:54,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287009405] [2024-10-31 22:02:54,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287009405] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:54,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714461175] [2024-10-31 22:02:54,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:02:54,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:54,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:54,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:02:54,591 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:02:54,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:54,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:02:54,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:54,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:02:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:54,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714461175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:55,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2024-10-31 22:02:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676614304] [2024-10-31 22:02:55,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:55,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:02:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:02:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:02:55,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-10-31 22:02:55,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 192 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 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) [2024-10-31 22:02:55,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:55,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-10-31 22:02:55,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:55,944 INFO L124 PetriNetUnfolderBase]: 422/802 cut-off events. [2024-10-31 22:02:55,944 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2024-10-31 22:02:55,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 802 events. 422/802 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3914 event pairs, 249 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 1785. Up to 553 conditions per place. [2024-10-31 22:02:55,951 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 34 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2024-10-31 22:02:55,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 312 flow [2024-10-31 22:02:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-10-31 22:02:55,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2024-10-31 22:02:55,953 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 192 flow. Second operand 5 states and 84 transitions. [2024-10-31 22:02:55,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 312 flow [2024-10-31 22:02:55,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 299 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:55,958 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 192 flow [2024-10-31 22:02:55,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2024-10-31 22:02:55,959 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2024-10-31 22:02:55,959 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 192 flow [2024-10-31 22:02:55,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 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) [2024-10-31 22:02:55,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:55,960 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:55,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:02:56,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:56,165 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:56,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:56,165 INFO L85 PathProgramCache]: Analyzing trace with hash 426823501, now seen corresponding path program 2 times [2024-10-31 22:02:56,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:56,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096806996] [2024-10-31 22:02:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:56,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:02:56,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:56,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096806996] [2024-10-31 22:02:56,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096806996] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:56,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422209701] [2024-10-31 22:02:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:02:56,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:56,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:56,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:02:56,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:02:56,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:56,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:02:56,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:56,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:02:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:02:56,994 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:02:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422209701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:02:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-10-31 22:02:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170215007] [2024-10-31 22:02:56,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:56,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:02:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:02:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:02:57,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-31 22:02:57,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:57,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:57,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-31 22:02:57,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:57,418 INFO L124 PetriNetUnfolderBase]: 537/949 cut-off events. [2024-10-31 22:02:57,418 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2024-10-31 22:02:57,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2719 conditions, 949 events. 537/949 cut-off events. For 995/995 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4216 event pairs, 120 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 2259. Up to 509 conditions per place. [2024-10-31 22:02:57,426 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 53 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2024-10-31 22:02:57,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 437 flow [2024-10-31 22:02:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-10-31 22:02:57,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5352941176470588 [2024-10-31 22:02:57,428 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 192 flow. Second operand 5 states and 91 transitions. [2024-10-31 22:02:57,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 437 flow [2024-10-31 22:02:57,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 395 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:57,433 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 204 flow [2024-10-31 22:02:57,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-10-31 22:02:57,434 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2024-10-31 22:02:57,434 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 204 flow [2024-10-31 22:02:57,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:57,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:57,435 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:57,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:02:57,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:02:57,636 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:57,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash -505595175, now seen corresponding path program 1 times [2024-10-31 22:02:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315120328] [2024-10-31 22:02:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:57,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315120328] [2024-10-31 22:02:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315120328] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:57,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234889685] [2024-10-31 22:02:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:57,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:57,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:57,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:02:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:57,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:02:57,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:58,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:58,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-10-31 22:02:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:58,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234889685] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:58,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:58,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-10-31 22:02:58,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937758840] [2024-10-31 22:02:58,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:58,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:02:58,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:58,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:02:58,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:02:58,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-31 22:02:58,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 204 flow. Second operand has 16 states, 16 states have (on average 12.375) internal successors, (198), 16 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:58,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:58,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-31 22:02:58,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:59,290 INFO L124 PetriNetUnfolderBase]: 491/871 cut-off events. [2024-10-31 22:02:59,291 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2024-10-31 22:02:59,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 871 events. 491/871 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3781 event pairs, 309 based on Foata normal form. 0/839 useless extension candidates. Maximal degree in co-relation 2163. Up to 470 conditions per place. [2024-10-31 22:02:59,299 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 61 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-10-31 22:02:59,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 469 flow [2024-10-31 22:02:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:02:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:02:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-10-31 22:02:59,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2024-10-31 22:02:59,301 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 204 flow. Second operand 8 states and 142 transitions. [2024-10-31 22:02:59,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 469 flow [2024-10-31 22:02:59,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 457 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:59,307 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 237 flow [2024-10-31 22:02:59,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2024-10-31 22:02:59,308 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 25 predicate places. [2024-10-31 22:02:59,308 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 237 flow [2024-10-31 22:02:59,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.375) internal successors, (198), 16 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:59,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:59,309 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:59,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:02:59,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:02:59,510 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:02:59,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2139461359, now seen corresponding path program 2 times [2024-10-31 22:02:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:59,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41141399] [2024-10-31 22:02:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:59,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:02:59,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41141399] [2024-10-31 22:02:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41141399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416592166] [2024-10-31 22:02:59,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:02:59,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:59,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:59,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:59,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:02:59,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:02:59,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:59,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:02:59,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:59,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:03:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:03:00,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:03:00,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416592166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:00,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:00,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2024-10-31 22:03:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892054916] [2024-10-31 22:03:00,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:00,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:03:00,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:03:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:03:00,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-10-31 22:03:00,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 237 flow. Second operand has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:00,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:00,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-10-31 22:03:00,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:01,157 INFO L124 PetriNetUnfolderBase]: 445/793 cut-off events. [2024-10-31 22:03:01,157 INFO L125 PetriNetUnfolderBase]: For 791/791 co-relation queries the response was YES. [2024-10-31 22:03:01,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 793 events. 445/793 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3455 event pairs, 204 based on Foata normal form. 16/809 useless extension candidates. Maximal degree in co-relation 2026. Up to 466 conditions per place. [2024-10-31 22:03:01,164 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 36 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-10-31 22:03:01,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 47 transitions, 362 flow [2024-10-31 22:03:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:03:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:03:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-31 22:03:01,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-10-31 22:03:01,166 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 237 flow. Second operand 5 states and 78 transitions. [2024-10-31 22:03:01,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 47 transitions, 362 flow [2024-10-31 22:03:01,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 347 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-31 22:03:01,172 INFO L231 Difference]: Finished difference. Result has 57 places, 37 transitions, 230 flow [2024-10-31 22:03:01,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=57, PETRI_TRANSITIONS=37} [2024-10-31 22:03:01,173 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 22 predicate places. [2024-10-31 22:03:01,173 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 37 transitions, 230 flow [2024-10-31 22:03:01,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.545454545454545) internal successors, (149), 11 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:01,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:01,174 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:01,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-31 22:03:01,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:03:01,379 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:01,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:01,379 INFO L85 PathProgramCache]: Analyzing trace with hash 65008428, now seen corresponding path program 1 times [2024-10-31 22:03:01,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:01,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797052256] [2024-10-31 22:03:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797052256] [2024-10-31 22:03:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797052256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:03:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764947262] [2024-10-31 22:03:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:01,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:03:01,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:03:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:03:01,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 37 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:01,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:01,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:01,648 INFO L124 PetriNetUnfolderBase]: 445/789 cut-off events. [2024-10-31 22:03:01,648 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2024-10-31 22:03:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 789 events. 445/789 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3367 event pairs, 134 based on Foata normal form. 2/791 useless extension candidates. Maximal degree in co-relation 2123. Up to 601 conditions per place. [2024-10-31 22:03:01,654 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-10-31 22:03:01,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 395 flow [2024-10-31 22:03:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:03:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:03:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-31 22:03:01,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-10-31 22:03:01,656 INFO L175 Difference]: Start difference. First operand has 57 places, 37 transitions, 230 flow. Second operand 3 states and 70 transitions. [2024-10-31 22:03:01,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 395 flow [2024-10-31 22:03:01,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 373 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:03:01,662 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 265 flow [2024-10-31 22:03:01,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2024-10-31 22:03:01,664 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2024-10-31 22:03:01,664 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 265 flow [2024-10-31 22:03:01,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:01,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:01,665 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:01,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:03:01,665 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:01,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -570332568, now seen corresponding path program 1 times [2024-10-31 22:03:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170018998] [2024-10-31 22:03:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:01,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:01,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170018998] [2024-10-31 22:03:01,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170018998] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:01,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:01,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:03:01,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491599196] [2024-10-31 22:03:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:01,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:03:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:03:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:03:01,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:01,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:01,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:01,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:01,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:02,079 INFO L124 PetriNetUnfolderBase]: 517/935 cut-off events. [2024-10-31 22:03:02,080 INFO L125 PetriNetUnfolderBase]: For 1188/1188 co-relation queries the response was YES. [2024-10-31 22:03:02,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 935 events. 517/935 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4594 event pairs, 174 based on Foata normal form. 28/963 useless extension candidates. Maximal degree in co-relation 2630. Up to 456 conditions per place. [2024-10-31 22:03:02,085 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 71 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2024-10-31 22:03:02,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 685 flow [2024-10-31 22:03:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:03:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:03:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-10-31 22:03:02,087 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-10-31 22:03:02,087 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 265 flow. Second operand 5 states and 112 transitions. [2024-10-31 22:03:02,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 685 flow [2024-10-31 22:03:02,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 86 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:03:02,094 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 389 flow [2024-10-31 22:03:02,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2024-10-31 22:03:02,095 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-10-31 22:03:02,095 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 389 flow [2024-10-31 22:03:02,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:02,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:02,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:02,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:03:02,096 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:02,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1357048030, now seen corresponding path program 2 times [2024-10-31 22:03:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:02,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704792128] [2024-10-31 22:03:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704792128] [2024-10-31 22:03:02,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704792128] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:02,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571252876] [2024-10-31 22:03:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:03:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:02,217 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:02,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:03:02,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:03:02,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:03:02,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:03:02,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:02,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:02,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571252876] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:02,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:03:02,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-10-31 22:03:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990164080] [2024-10-31 22:03:02,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:02,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:03:02,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:03:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:02,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:02,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:02,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:02,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:02,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:02,615 INFO L124 PetriNetUnfolderBase]: 537/969 cut-off events. [2024-10-31 22:03:02,616 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-10-31 22:03:02,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3638 conditions, 969 events. 537/969 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4570 event pairs, 96 based on Foata normal form. 14/983 useless extension candidates. Maximal degree in co-relation 3238. Up to 598 conditions per place. [2024-10-31 22:03:02,624 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 56 selfloop transitions, 17 changer transitions 1/75 dead transitions. [2024-10-31 22:03:02,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 685 flow [2024-10-31 22:03:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:03:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:03:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-10-31 22:03:02,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6397058823529411 [2024-10-31 22:03:02,626 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 389 flow. Second operand 4 states and 87 transitions. [2024-10-31 22:03:02,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 685 flow [2024-10-31 22:03:02,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 654 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-31 22:03:02,637 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 474 flow [2024-10-31 22:03:02,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=474, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-10-31 22:03:02,637 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2024-10-31 22:03:02,638 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 474 flow [2024-10-31 22:03:02,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:02,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:02,638 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:02,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-31 22:03:02,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:03:02,839 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:02,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1553681576, now seen corresponding path program 3 times [2024-10-31 22:03:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45887533] [2024-10-31 22:03:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:02,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:02,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45887533] [2024-10-31 22:03:02,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45887533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:02,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:02,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:03:02,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132015803] [2024-10-31 22:03:02,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:02,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:03:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:03:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:03:02,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:02,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 474 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:02,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:02,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:02,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:03,293 INFO L124 PetriNetUnfolderBase]: 543/971 cut-off events. [2024-10-31 22:03:03,294 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2024-10-31 22:03:03,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 971 events. 543/971 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4715 event pairs, 162 based on Foata normal form. 22/993 useless extension candidates. Maximal degree in co-relation 3655. Up to 502 conditions per place. [2024-10-31 22:03:03,303 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 77 selfloop transitions, 19 changer transitions 8/105 dead transitions. [2024-10-31 22:03:03,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 1070 flow [2024-10-31 22:03:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:03:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:03:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-10-31 22:03:03,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-10-31 22:03:03,304 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 474 flow. Second operand 6 states and 129 transitions. [2024-10-31 22:03:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 1070 flow [2024-10-31 22:03:03,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 1060 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-31 22:03:03,320 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 647 flow [2024-10-31 22:03:03,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=647, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-10-31 22:03:03,321 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 40 predicate places. [2024-10-31 22:03:03,321 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 647 flow [2024-10-31 22:03:03,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:03,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:03,321 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:03,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-31 22:03:03,322 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:03,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash 712801890, now seen corresponding path program 4 times [2024-10-31 22:03:03,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:03,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726529130] [2024-10-31 22:03:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:03,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:03,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726529130] [2024-10-31 22:03:03,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726529130] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:03,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:03,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:03:03,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084388698] [2024-10-31 22:03:03,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:03,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:03:03,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:03:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:03:03,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:03,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 647 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:03,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:03,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:03,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:03,807 INFO L124 PetriNetUnfolderBase]: 517/943 cut-off events. [2024-10-31 22:03:03,807 INFO L125 PetriNetUnfolderBase]: For 3852/3852 co-relation queries the response was YES. [2024-10-31 22:03:03,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4408 conditions, 943 events. 517/943 cut-off events. For 3852/3852 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4460 event pairs, 196 based on Foata normal form. 26/969 useless extension candidates. Maximal degree in co-relation 3845. Up to 598 conditions per place. [2024-10-31 22:03:03,816 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 68 selfloop transitions, 26 changer transitions 5/100 dead transitions. [2024-10-31 22:03:03,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 1113 flow [2024-10-31 22:03:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:03:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:03:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-10-31 22:03:03,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-10-31 22:03:03,817 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 647 flow. Second operand 6 states and 126 transitions. [2024-10-31 22:03:03,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 1113 flow [2024-10-31 22:03:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 1090 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-10-31 22:03:03,831 INFO L231 Difference]: Finished difference. Result has 82 places, 72 transitions, 839 flow [2024-10-31 22:03:03,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=82, PETRI_TRANSITIONS=72} [2024-10-31 22:03:03,833 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 47 predicate places. [2024-10-31 22:03:03,833 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 72 transitions, 839 flow [2024-10-31 22:03:03,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:03,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:03,834 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:03,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 22:03:03,834 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:03,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1945677142, now seen corresponding path program 5 times [2024-10-31 22:03:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363421524] [2024-10-31 22:03:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:03,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:03,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:03,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363421524] [2024-10-31 22:03:03,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363421524] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:03,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:03,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:03:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538970912] [2024-10-31 22:03:03,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:03,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:03:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:03:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:03:03,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:03,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 72 transitions, 839 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:03,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:03,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:03,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:04,215 INFO L124 PetriNetUnfolderBase]: 501/903 cut-off events. [2024-10-31 22:03:04,215 INFO L125 PetriNetUnfolderBase]: For 4850/4850 co-relation queries the response was YES. [2024-10-31 22:03:04,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4669 conditions, 903 events. 501/903 cut-off events. For 4850/4850 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4166 event pairs, 196 based on Foata normal form. 8/911 useless extension candidates. Maximal degree in co-relation 4077. Up to 598 conditions per place. [2024-10-31 22:03:04,224 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 65 selfloop transitions, 14 changer transitions 11/91 dead transitions. [2024-10-31 22:03:04,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 91 transitions, 1133 flow [2024-10-31 22:03:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:03:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:03:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-10-31 22:03:04,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-10-31 22:03:04,226 INFO L175 Difference]: Start difference. First operand has 82 places, 72 transitions, 839 flow. Second operand 5 states and 100 transitions. [2024-10-31 22:03:04,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 91 transitions, 1133 flow [2024-10-31 22:03:04,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 1105 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-31 22:03:04,245 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 861 flow [2024-10-31 22:03:04,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=861, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2024-10-31 22:03:04,246 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 51 predicate places. [2024-10-31 22:03:04,246 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 861 flow [2024-10-31 22:03:04,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:04,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:04,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 22:03:04,247 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:04,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1974317631, now seen corresponding path program 1 times [2024-10-31 22:03:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:04,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816434331] [2024-10-31 22:03:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:04,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:04,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816434331] [2024-10-31 22:03:04,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816434331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:04,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18403977] [2024-10-31 22:03:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:04,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:04,510 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:04,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:03:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:04,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:03:04,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:04,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:03:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18403977] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:04,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:03:04,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2024-10-31 22:03:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671796220] [2024-10-31 22:03:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:04,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:03:04,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:03:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:03:04,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:04,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 861 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:04,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:04,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:03:04,943 INFO L124 PetriNetUnfolderBase]: 511/889 cut-off events. [2024-10-31 22:03:04,943 INFO L125 PetriNetUnfolderBase]: For 5210/5210 co-relation queries the response was YES. [2024-10-31 22:03:04,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 889 events. 511/889 cut-off events. For 5210/5210 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3884 event pairs, 62 based on Foata normal form. 20/909 useless extension candidates. Maximal degree in co-relation 4719. Up to 428 conditions per place. [2024-10-31 22:03:04,952 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 72 selfloop transitions, 28 changer transitions 4/105 dead transitions. [2024-10-31 22:03:04,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 105 transitions, 1331 flow [2024-10-31 22:03:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:03:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:03:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-10-31 22:03:04,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5798319327731093 [2024-10-31 22:03:04,954 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 861 flow. Second operand 7 states and 138 transitions. [2024-10-31 22:03:04,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 105 transitions, 1331 flow [2024-10-31 22:03:04,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 105 transitions, 1264 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-10-31 22:03:04,974 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 980 flow [2024-10-31 22:03:04,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=980, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-10-31 22:03:04,974 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 53 predicate places. [2024-10-31 22:03:04,975 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 980 flow [2024-10-31 22:03:04,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:04,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:03:04,975 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:04,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 22:03:05,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:05,179 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:03:05,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1207816143, now seen corresponding path program 1 times [2024-10-31 22:03:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:05,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189142940] [2024-10-31 22:03:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:05,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189142940] [2024-10-31 22:03:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189142940] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:05,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718340778] [2024-10-31 22:03:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:05,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:05,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f7873b3-2aaa-4715-9ddb-479b7737c1f2/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:03:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:05,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:03:05,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:05,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:06,087 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-10-31 22:03:06,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 47 [2024-10-31 22:03:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:06,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718340778] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:03:06,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:03:06,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2024-10-31 22:03:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081593931] [2024-10-31 22:03:06,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:06,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:03:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:03:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:03:06,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-31 22:03:06,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 980 flow. Second operand has 21 states, 21 states have (on average 14.857142857142858) internal successors, (312), 21 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:03:06,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:03:06,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-31 22:03:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand