./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya --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 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:21:02,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:21:02,074 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:21:02,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:21:02,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:21:02,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:21:02,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:21:02,104 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:21:02,105 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:21:02,105 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:21:02,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:21:02,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:21:02,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:21:02,108 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:21:02,108 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:21:02,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:21:02,109 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:21:02,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:21:02,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:21:02,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:21:02,111 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:21:02,112 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:21:02,112 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:21:02,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:21:02,113 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:21:02,113 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:21:02,114 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:21:02,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:21:02,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:21:02,115 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:21:02,116 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:21:02,116 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:21:02,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:21:02,117 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:21:02,117 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:21:02,118 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:21:02,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:21:02,118 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:21:02,118 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:21:02,119 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:21:02,119 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:21:02,119 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_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 [2023-11-29 06:21:02,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:21:02,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:21:02,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:21:02,374 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:21:02,375 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:21:02,376 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2023-11-29 06:21:05,188 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:21:05,404 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:21:05,405 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2023-11-29 06:21:05,413 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/data/d6454f9a0/843119661f7b4d08802dee1e8398073c/FLAGa20100434 [2023-11-29 06:21:05,426 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/data/d6454f9a0/843119661f7b4d08802dee1e8398073c [2023-11-29 06:21:05,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:21:05,430 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:21:05,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:21:05,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:21:05,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:21:05,437 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5e745f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05, skipping insertion in model container [2023-11-29 06:21:05,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:21:05,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:21:05,662 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:21:05,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:21:05,697 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:21:05,697 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:21:05,705 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:21:05,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05 WrapperNode [2023-11-29 06:21:05,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:21:05,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:21:05,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:21:05,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:21:05,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,724 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,745 INFO L138 Inliner]: procedures = 22, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 83 [2023-11-29 06:21:05,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:21:05,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:21:05,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:21:05,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:21:05,758 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,778 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 06:21:05,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:21:05,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:21:05,797 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:21:05,797 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:21:05,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (1/1) ... [2023-11-29 06:21:05,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:21:05,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:05,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:21:05,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:21:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:21:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:21:05,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:21:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:21:05,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:21:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:21:05,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:21:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:21:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:21:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:21:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:21:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:21:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:21:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:21:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:21:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:21:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:21:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:21:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:21:05,868 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:21:05,987 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:21:05,989 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:21:06,237 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:21:06,446 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:21:06,446 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:21:06,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:21:06 BoogieIcfgContainer [2023-11-29 06:21:06,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:21:06,450 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:21:06,451 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:21:06,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:21:06,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:21:05" (1/3) ... [2023-11-29 06:21:06,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f9c1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:21:06, skipping insertion in model container [2023-11-29 06:21:06,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:05" (2/3) ... [2023-11-29 06:21:06,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f9c1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:21:06, skipping insertion in model container [2023-11-29 06:21:06,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:21:06" (3/3) ... [2023-11-29 06:21:06,457 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2023-11-29 06:21:06,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:21:06,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-29 06:21:06,477 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:21:06,535 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 06:21:06,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 57 transitions, 135 flow [2023-11-29 06:21:06,605 INFO L124 PetriNetUnfolderBase]: 3/54 cut-off events. [2023-11-29 06:21:06,605 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:21:06,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 3/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-29 06:21:06,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 57 transitions, 135 flow [2023-11-29 06:21:06,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 53 transitions, 124 flow [2023-11-29 06:21:06,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:21:06,627 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6553fc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:21:06,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-29 06:21:06,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:21:06,631 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 06:21:06,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:21:06,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:06,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:21:06,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:06,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash 11174, now seen corresponding path program 1 times [2023-11-29 06:21:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:06,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161568608] [2023-11-29 06:21:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:06,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:06,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161568608] [2023-11-29 06:21:06,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161568608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:06,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:06,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:21:06,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239446531] [2023-11-29 06:21:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:06,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:07,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-29 06:21:07,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:07,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-29 06:21:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:07,208 INFO L124 PetriNetUnfolderBase]: 295/651 cut-off events. [2023-11-29 06:21:07,208 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-29 06:21:07,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 651 events. 295/651 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3913 event pairs, 238 based on Foata normal form. 1/540 useless extension candidates. Maximal degree in co-relation 945. Up to 434 conditions per place. [2023-11-29 06:21:07,220 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 19 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-29 06:21:07,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 156 flow [2023-11-29 06:21:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-29 06:21:07,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134502923976608 [2023-11-29 06:21:07,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-29 06:21:07,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-29 06:21:07,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:07,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-29 06:21:07,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,246 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 124 flow. Second operand 3 states and 122 transitions. [2023-11-29 06:21:07,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 156 flow [2023-11-29 06:21:07,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:21:07,276 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 106 flow [2023-11-29 06:21:07,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-11-29 06:21:07,281 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-11-29 06:21:07,281 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 106 flow [2023-11-29 06:21:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:07,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 06:21:07,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:21:07,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:07,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash 11175, now seen corresponding path program 1 times [2023-11-29 06:21:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:07,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238491244] [2023-11-29 06:21:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238491244] [2023-11-29 06:21:07,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238491244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:07,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:21:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847591050] [2023-11-29 06:21:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:07,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:07,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:07,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:07,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:07,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:07,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:07,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:07,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:07,535 INFO L124 PetriNetUnfolderBase]: 202/495 cut-off events. [2023-11-29 06:21:07,535 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 06:21:07,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 495 events. 202/495 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2921 event pairs, 163 based on Foata normal form. 37/451 useless extension candidates. Maximal degree in co-relation 810. Up to 304 conditions per place. [2023-11-29 06:21:07,540 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 17 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-29 06:21:07,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 138 flow [2023-11-29 06:21:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 06:21:07,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309941520467836 [2023-11-29 06:21:07,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 06:21:07,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 06:21:07,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:07,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 06:21:07,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,547 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 106 flow. Second operand 3 states and 125 transitions. [2023-11-29 06:21:07,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 138 flow [2023-11-29 06:21:07,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:07,549 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 103 flow [2023-11-29 06:21:07,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-29 06:21:07,551 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-11-29 06:21:07,551 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 103 flow [2023-11-29 06:21:07,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:07,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:21:07,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:21:07,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:07,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 333226199, now seen corresponding path program 1 times [2023-11-29 06:21:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:07,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027013225] [2023-11-29 06:21:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:07,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:07,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027013225] [2023-11-29 06:21:07,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027013225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:07,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:07,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:21:07,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094631278] [2023-11-29 06:21:07,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:07,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:07,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:07,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-29 06:21:07,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:07,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-29 06:21:07,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:07,741 INFO L124 PetriNetUnfolderBase]: 227/519 cut-off events. [2023-11-29 06:21:07,741 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-29 06:21:07,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 519 events. 227/519 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2997 event pairs, 182 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 874. Up to 344 conditions per place. [2023-11-29 06:21:07,746 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 19 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-29 06:21:07,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 139 flow [2023-11-29 06:21:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-29 06:21:07,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076023391812866 [2023-11-29 06:21:07,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-29 06:21:07,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-29 06:21:07,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:07,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-29 06:21:07,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,751 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 103 flow. Second operand 3 states and 121 transitions. [2023-11-29 06:21:07,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 139 flow [2023-11-29 06:21:07,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:07,753 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 100 flow [2023-11-29 06:21:07,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-29 06:21:07,755 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -10 predicate places. [2023-11-29 06:21:07,755 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 100 flow [2023-11-29 06:21:07,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:07,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:21:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:21:07,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:07,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 333226200, now seen corresponding path program 1 times [2023-11-29 06:21:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:07,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212875517] [2023-11-29 06:21:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:07,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212875517] [2023-11-29 06:21:07,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212875517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:07,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:07,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:21:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151029030] [2023-11-29 06:21:07,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:07,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:07,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:07,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:07,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:07,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:07,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:07,970 INFO L124 PetriNetUnfolderBase]: 202/471 cut-off events. [2023-11-29 06:21:07,971 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 06:21:07,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 471 events. 202/471 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2735 event pairs, 163 based on Foata normal form. 12/426 useless extension candidates. Maximal degree in co-relation 786. Up to 304 conditions per place. [2023-11-29 06:21:07,976 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 17 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-29 06:21:07,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 132 flow [2023-11-29 06:21:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 06:21:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309941520467836 [2023-11-29 06:21:07,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 06:21:07,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 06:21:07,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:07,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 06:21:07,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,980 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 100 flow. Second operand 3 states and 125 transitions. [2023-11-29 06:21:07,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 132 flow [2023-11-29 06:21:07,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:07,982 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 97 flow [2023-11-29 06:21:07,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-29 06:21:07,983 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -11 predicate places. [2023-11-29 06:21:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 97 flow [2023-11-29 06:21:07,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:07,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:07,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:21:07,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:07,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1472618476, now seen corresponding path program 1 times [2023-11-29 06:21:07,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:07,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532886283] [2023-11-29 06:21:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532886283] [2023-11-29 06:21:08,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532886283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:08,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:08,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:21:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289376971] [2023-11-29 06:21:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:08,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-29 06:21:08,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:08,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-29 06:21:08,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:08,146 INFO L124 PetriNetUnfolderBase]: 219/479 cut-off events. [2023-11-29 06:21:08,146 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 06:21:08,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 479 events. 219/479 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2724 event pairs, 178 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 824. Up to 334 conditions per place. [2023-11-29 06:21:08,151 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 19 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-29 06:21:08,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 133 flow [2023-11-29 06:21:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-29 06:21:08,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076023391812866 [2023-11-29 06:21:08,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-29 06:21:08,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-29 06:21:08,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:08,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-29 06:21:08,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,156 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 97 flow. Second operand 3 states and 121 transitions. [2023-11-29 06:21:08,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 133 flow [2023-11-29 06:21:08,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:08,157 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 94 flow [2023-11-29 06:21:08,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-11-29 06:21:08,159 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -12 predicate places. [2023-11-29 06:21:08,159 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 94 flow [2023-11-29 06:21:08,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:08,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:21:08,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:08,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1472618477, now seen corresponding path program 1 times [2023-11-29 06:21:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:08,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188679683] [2023-11-29 06:21:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:08,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:08,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188679683] [2023-11-29 06:21:08,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188679683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:08,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:08,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:21:08,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258752474] [2023-11-29 06:21:08,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:08,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:08,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:08,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:08,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:08,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:08,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:08,354 INFO L124 PetriNetUnfolderBase]: 202/447 cut-off events. [2023-11-29 06:21:08,354 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 06:21:08,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 447 events. 202/447 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2495 event pairs, 163 based on Foata normal form. 12/426 useless extension candidates. Maximal degree in co-relation 762. Up to 304 conditions per place. [2023-11-29 06:21:08,358 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 17 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-29 06:21:08,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 126 flow [2023-11-29 06:21:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 06:21:08,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309941520467836 [2023-11-29 06:21:08,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 06:21:08,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 06:21:08,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:08,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 06:21:08,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,363 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 94 flow. Second operand 3 states and 125 transitions. [2023-11-29 06:21:08,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 126 flow [2023-11-29 06:21:08,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:08,365 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 91 flow [2023-11-29 06:21:08,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-11-29 06:21:08,366 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2023-11-29 06:21:08,366 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 91 flow [2023-11-29 06:21:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:08,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:08,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:21:08,367 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:08,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash 38098687, now seen corresponding path program 1 times [2023-11-29 06:21:08,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:08,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911325673] [2023-11-29 06:21:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:08,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:08,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911325673] [2023-11-29 06:21:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911325673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:08,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:08,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:21:08,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403398748] [2023-11-29 06:21:08,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:08,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:08,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:21:08,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:08,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:08,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:08,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:08,920 INFO L124 PetriNetUnfolderBase]: 603/1021 cut-off events. [2023-11-29 06:21:08,920 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-29 06:21:08,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 1021 events. 603/1021 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5020 event pairs, 42 based on Foata normal form. 40/1043 useless extension candidates. Maximal degree in co-relation 1876. Up to 562 conditions per place. [2023-11-29 06:21:08,928 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 44 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-11-29 06:21:08,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 265 flow [2023-11-29 06:21:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2023-11-29 06:21:08,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8035087719298246 [2023-11-29 06:21:08,930 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 229 transitions. [2023-11-29 06:21:08,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 229 transitions. [2023-11-29 06:21:08,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:08,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 229 transitions. [2023-11-29 06:21:08,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,933 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,933 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 91 flow. Second operand 5 states and 229 transitions. [2023-11-29 06:21:08,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 265 flow [2023-11-29 06:21:08,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:08,935 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 150 flow [2023-11-29 06:21:08,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-29 06:21:08,936 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2023-11-29 06:21:08,937 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 150 flow [2023-11-29 06:21:08,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:08,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:08,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:21:08,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:08,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash 807555886, now seen corresponding path program 1 times [2023-11-29 06:21:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:08,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210334233] [2023-11-29 06:21:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:08,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:09,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:09,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210334233] [2023-11-29 06:21:09,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210334233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:09,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:09,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:21:09,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690001518] [2023-11-29 06:21:09,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:09,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:09,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:09,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:21:09,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:09,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:09,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:09,622 INFO L124 PetriNetUnfolderBase]: 704/1214 cut-off events. [2023-11-29 06:21:09,622 INFO L125 PetriNetUnfolderBase]: For 1044/1080 co-relation queries the response was YES. [2023-11-29 06:21:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 1214 events. 704/1214 cut-off events. For 1044/1080 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6407 event pairs, 109 based on Foata normal form. 58/1190 useless extension candidates. Maximal degree in co-relation 3024. Up to 836 conditions per place. [2023-11-29 06:21:09,634 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 35 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2023-11-29 06:21:09,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 323 flow [2023-11-29 06:21:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:21:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:21:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2023-11-29 06:21:09,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7850877192982456 [2023-11-29 06:21:09,636 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 179 transitions. [2023-11-29 06:21:09,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 179 transitions. [2023-11-29 06:21:09,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:09,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 179 transitions. [2023-11-29 06:21:09,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,638 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,638 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 150 flow. Second operand 4 states and 179 transitions. [2023-11-29 06:21:09,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 323 flow [2023-11-29 06:21:09,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:09,643 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 218 flow [2023-11-29 06:21:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-11-29 06:21:09,644 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-11-29 06:21:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 218 flow [2023-11-29 06:21:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:09,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:09,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:21:09,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:09,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:09,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1032396546, now seen corresponding path program 1 times [2023-11-29 06:21:09,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:09,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794852075] [2023-11-29 06:21:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:09,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:09,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794852075] [2023-11-29 06:21:09,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794852075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:09,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:21:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690649013] [2023-11-29 06:21:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:09,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:21:09,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:09,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:09,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:09,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:10,302 INFO L124 PetriNetUnfolderBase]: 843/1401 cut-off events. [2023-11-29 06:21:10,302 INFO L125 PetriNetUnfolderBase]: For 1810/1942 co-relation queries the response was YES. [2023-11-29 06:21:10,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4070 conditions, 1401 events. 843/1401 cut-off events. For 1810/1942 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7100 event pairs, 95 based on Foata normal form. 109/1486 useless extension candidates. Maximal degree in co-relation 4052. Up to 437 conditions per place. [2023-11-29 06:21:10,318 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 51 selfloop transitions, 7 changer transitions 2/80 dead transitions. [2023-11-29 06:21:10,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 450 flow [2023-11-29 06:21:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2023-11-29 06:21:10,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7859649122807018 [2023-11-29 06:21:10,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 224 transitions. [2023-11-29 06:21:10,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 224 transitions. [2023-11-29 06:21:10,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:10,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 224 transitions. [2023-11-29 06:21:10,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,323 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 218 flow. Second operand 5 states and 224 transitions. [2023-11-29 06:21:10,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 450 flow [2023-11-29 06:21:10,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:21:10,329 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 272 flow [2023-11-29 06:21:10,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-11-29 06:21:10,330 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2023-11-29 06:21:10,330 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 272 flow [2023-11-29 06:21:10,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:10,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:21:10,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:10,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:10,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1016292944, now seen corresponding path program 1 times [2023-11-29 06:21:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:10,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305795656] [2023-11-29 06:21:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:10,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:21:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:10,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305795656] [2023-11-29 06:21:10,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305795656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:10,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:10,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:21:10,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740332424] [2023-11-29 06:21:10,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:10,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:21:10,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-29 06:21:10,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:10,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-29 06:21:10,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:10,928 INFO L124 PetriNetUnfolderBase]: 1168/1925 cut-off events. [2023-11-29 06:21:10,928 INFO L125 PetriNetUnfolderBase]: For 3229/3394 co-relation queries the response was YES. [2023-11-29 06:21:10,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6288 conditions, 1925 events. 1168/1925 cut-off events. For 3229/3394 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 10504 event pairs, 166 based on Foata normal form. 87/1980 useless extension candidates. Maximal degree in co-relation 6265. Up to 871 conditions per place. [2023-11-29 06:21:10,950 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 65 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2023-11-29 06:21:10,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 99 transitions, 629 flow [2023-11-29 06:21:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2023-11-29 06:21:10,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2023-11-29 06:21:10,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 231 transitions. [2023-11-29 06:21:10,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 231 transitions. [2023-11-29 06:21:10,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:10,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 231 transitions. [2023-11-29 06:21:10,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,954 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 272 flow. Second operand 5 states and 231 transitions. [2023-11-29 06:21:10,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 99 transitions, 629 flow [2023-11-29 06:21:10,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:10,962 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 381 flow [2023-11-29 06:21:10,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-11-29 06:21:10,963 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2023-11-29 06:21:10,963 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 381 flow [2023-11-29 06:21:10,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:10,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:10,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:21:10,964 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:10,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:10,965 INFO L85 PathProgramCache]: Analyzing trace with hash 171244775, now seen corresponding path program 1 times [2023-11-29 06:21:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:10,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978676146] [2023-11-29 06:21:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:11,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978676146] [2023-11-29 06:21:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978676146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821566249] [2023-11-29 06:21:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:11,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:11,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:11,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:11,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:21:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:11,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:21:11,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:21:11,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:21:11,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821566249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:11,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:21:11,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-29 06:21:11,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674684687] [2023-11-29 06:21:11,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:21:11,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-29 06:21:11,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 381 flow. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:11,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-29 06:21:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:12,087 INFO L124 PetriNetUnfolderBase]: 1910/3125 cut-off events. [2023-11-29 06:21:12,087 INFO L125 PetriNetUnfolderBase]: For 8394/8466 co-relation queries the response was YES. [2023-11-29 06:21:12,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11189 conditions, 3125 events. 1910/3125 cut-off events. For 8394/8466 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18834 event pairs, 381 based on Foata normal form. 104/3208 useless extension candidates. Maximal degree in co-relation 11162. Up to 1888 conditions per place. [2023-11-29 06:21:12,122 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 81 selfloop transitions, 15 changer transitions 4/117 dead transitions. [2023-11-29 06:21:12,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 891 flow [2023-11-29 06:21:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:21:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:21:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 299 transitions. [2023-11-29 06:21:12,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7493734335839599 [2023-11-29 06:21:12,124 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 299 transitions. [2023-11-29 06:21:12,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 299 transitions. [2023-11-29 06:21:12,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:12,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 299 transitions. [2023-11-29 06:21:12,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.714285714285715) internal successors, (299), 7 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,127 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,127 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 381 flow. Second operand 7 states and 299 transitions. [2023-11-29 06:21:12,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 891 flow [2023-11-29 06:21:12,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 877 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:12,149 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 437 flow [2023-11-29 06:21:12,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=437, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-11-29 06:21:12,149 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2023-11-29 06:21:12,150 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 437 flow [2023-11-29 06:21:12,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:12,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:12,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:12,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:21:12,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:12,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1593292369, now seen corresponding path program 2 times [2023-11-29 06:21:12,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5968193] [2023-11-29 06:21:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5968193] [2023-11-29 06:21:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5968193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:12,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:12,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:21:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596834] [2023-11-29 06:21:12,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:21:12,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:12,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:21:12,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:21:12,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 57 [2023-11-29 06:21:12,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 437 flow. Second operand has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:12,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 57 [2023-11-29 06:21:12,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:13,427 INFO L124 PetriNetUnfolderBase]: 2556/3915 cut-off events. [2023-11-29 06:21:13,427 INFO L125 PetriNetUnfolderBase]: For 12952/13131 co-relation queries the response was YES. [2023-11-29 06:21:13,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14896 conditions, 3915 events. 2556/3915 cut-off events. For 12952/13131 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 22853 event pairs, 124 based on Foata normal form. 212/3898 useless extension candidates. Maximal degree in co-relation 14867. Up to 1448 conditions per place. [2023-11-29 06:21:13,474 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 83 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2023-11-29 06:21:13,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 1051 flow [2023-11-29 06:21:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:21:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:21:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2023-11-29 06:21:13,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7243107769423559 [2023-11-29 06:21:13,476 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 289 transitions. [2023-11-29 06:21:13,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 289 transitions. [2023-11-29 06:21:13,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:13,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 289 transitions. [2023-11-29 06:21:13,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:13,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:13,480 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:13,480 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 437 flow. Second operand 7 states and 289 transitions. [2023-11-29 06:21:13,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 1051 flow [2023-11-29 06:21:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 1006 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-29 06:21:13,499 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 526 flow [2023-11-29 06:21:13,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-11-29 06:21:13,500 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 22 predicate places. [2023-11-29 06:21:13,500 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 526 flow [2023-11-29 06:21:13,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:13,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:13,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:13,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 06:21:13,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:13,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2123522515, now seen corresponding path program 3 times [2023-11-29 06:21:13,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:13,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141696733] [2023-11-29 06:21:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:13,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:13,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141696733] [2023-11-29 06:21:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141696733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:21:13,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345398162] [2023-11-29 06:21:13,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:21:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:21:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:21:13,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 57 [2023-11-29 06:21:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:13,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:13,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 57 [2023-11-29 06:21:13,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:14,846 INFO L124 PetriNetUnfolderBase]: 3211/4880 cut-off events. [2023-11-29 06:21:14,846 INFO L125 PetriNetUnfolderBase]: For 21552/21755 co-relation queries the response was YES. [2023-11-29 06:21:14,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21531 conditions, 4880 events. 3211/4880 cut-off events. For 21552/21755 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 29553 event pairs, 131 based on Foata normal form. 255/5043 useless extension candidates. Maximal degree in co-relation 21499. Up to 1891 conditions per place. [2023-11-29 06:21:14,900 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 107 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2023-11-29 06:21:14,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 159 transitions, 1425 flow [2023-11-29 06:21:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:21:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:21:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 407 transitions. [2023-11-29 06:21:14,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7140350877192982 [2023-11-29 06:21:14,903 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 407 transitions. [2023-11-29 06:21:14,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 407 transitions. [2023-11-29 06:21:14,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:14,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 407 transitions. [2023-11-29 06:21:14,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 40.7) internal successors, (407), 10 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 57.0) internal successors, (627), 11 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,908 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 57.0) internal successors, (627), 11 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,908 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 526 flow. Second operand 10 states and 407 transitions. [2023-11-29 06:21:14,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 159 transitions, 1425 flow [2023-11-29 06:21:14,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 159 transitions, 1415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:14,930 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 649 flow [2023-11-29 06:21:14,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=649, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2023-11-29 06:21:14,931 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2023-11-29 06:21:14,932 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 649 flow [2023-11-29 06:21:14,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:14,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:21:14,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:14,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash -689092095, now seen corresponding path program 4 times [2023-11-29 06:21:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:14,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647497784] [2023-11-29 06:21:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:14,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:17,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647497784] [2023-11-29 06:21:17,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647497784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071559035] [2023-11-29 06:21:17,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:21:17,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:17,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:17,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:17,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:21:18,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:21:18,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:18,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:21:18,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:19,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:20,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071559035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:20,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:20,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-29 06:21:20,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882227883] [2023-11-29 06:21:20,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:20,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:21:20,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:21:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:21:21,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 57 [2023-11-29 06:21:21,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 649 flow. Second operand has 24 states, 24 states have (on average 36.583333333333336) internal successors, (878), 24 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:21,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:21,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 57 [2023-11-29 06:21:21,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:33,358 INFO L124 PetriNetUnfolderBase]: 14069/22831 cut-off events. [2023-11-29 06:21:33,358 INFO L125 PetriNetUnfolderBase]: For 122869/127571 co-relation queries the response was YES. [2023-11-29 06:21:33,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104933 conditions, 22831 events. 14069/22831 cut-off events. For 122869/127571 co-relation queries the response was YES. Maximal size of possible extension queue 1520. Compared 179022 event pairs, 380 based on Foata normal form. 904/23187 useless extension candidates. Maximal degree in co-relation 104897. Up to 6516 conditions per place. [2023-11-29 06:21:33,648 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 281 selfloop transitions, 242 changer transitions 41/599 dead transitions. [2023-11-29 06:21:33,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 599 transitions, 5696 flow [2023-11-29 06:21:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 06:21:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 06:21:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2027 transitions. [2023-11-29 06:21:33,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7566256065696155 [2023-11-29 06:21:33,658 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2027 transitions. [2023-11-29 06:21:33,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2027 transitions. [2023-11-29 06:21:33,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:33,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2027 transitions. [2023-11-29 06:21:33,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 43.12765957446808) internal successors, (2027), 47 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:33,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 57.0) internal successors, (2736), 48 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:33,677 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 57.0) internal successors, (2736), 48 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:33,677 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 649 flow. Second operand 47 states and 2027 transitions. [2023-11-29 06:21:33,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 599 transitions, 5696 flow [2023-11-29 06:21:33,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 599 transitions, 5564 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 06:21:33,922 INFO L231 Difference]: Finished difference. Result has 151 places, 347 transitions, 3919 flow [2023-11-29 06:21:33,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3919, PETRI_PLACES=151, PETRI_TRANSITIONS=347} [2023-11-29 06:21:33,923 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 91 predicate places. [2023-11-29 06:21:33,923 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 347 transitions, 3919 flow [2023-11-29 06:21:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 36.583333333333336) internal successors, (878), 24 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:33,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:33,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:33,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:21:34,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:21:34,125 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:21:34,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -297939239, now seen corresponding path program 5 times [2023-11-29 06:21:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104434818] [2023-11-29 06:21:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104434818] [2023-11-29 06:21:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104434818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141499680] [2023-11-29 06:21:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:21:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:35,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:35,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:35,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:21:36,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:36,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:36,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:21:36,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:36,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141499680] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:37,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-29 06:21:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691361504] [2023-11-29 06:21:37,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:37,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:21:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:21:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:21:38,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 57 [2023-11-29 06:21:38,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 347 transitions, 3919 flow. Second operand has 24 states, 24 states have (on average 33.916666666666664) internal successors, (814), 24 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:38,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:38,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 57 [2023-11-29 06:21:38,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:00,092 INFO L124 PetriNetUnfolderBase]: 45391/70108 cut-off events. [2023-11-29 06:22:00,093 INFO L125 PetriNetUnfolderBase]: For 555702/564835 co-relation queries the response was YES. [2023-11-29 06:22:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370409 conditions, 70108 events. 45391/70108 cut-off events. For 555702/564835 co-relation queries the response was YES. Maximal size of possible extension queue 3482. Compared 570170 event pairs, 1983 based on Foata normal form. 2422/71653 useless extension candidates. Maximal degree in co-relation 370355. Up to 19713 conditions per place. [2023-11-29 06:22:01,084 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 758 selfloop transitions, 896 changer transitions 87/1769 dead transitions. [2023-11-29 06:22:01,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1769 transitions, 22285 flow [2023-11-29 06:22:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 06:22:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-11-29 06:22:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 2975 transitions. [2023-11-29 06:22:01,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053105737316263 [2023-11-29 06:22:01,093 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 2975 transitions. [2023-11-29 06:22:01,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 2975 transitions. [2023-11-29 06:22:01,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:01,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 2975 transitions. [2023-11-29 06:22:01,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 40.2027027027027) internal successors, (2975), 74 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:01,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 57.0) internal successors, (4275), 75 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:01,107 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 57.0) internal successors, (4275), 75 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:01,107 INFO L175 Difference]: Start difference. First operand has 151 places, 347 transitions, 3919 flow. Second operand 74 states and 2975 transitions. [2023-11-29 06:22:01,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1769 transitions, 22285 flow [2023-11-29 06:22:06,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1769 transitions, 18246 flow, removed 2005 selfloop flow, removed 6 redundant places. [2023-11-29 06:22:06,782 INFO L231 Difference]: Finished difference. Result has 273 places, 1151 transitions, 14469 flow [2023-11-29 06:22:06,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=14469, PETRI_PLACES=273, PETRI_TRANSITIONS=1151} [2023-11-29 06:22:06,783 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 213 predicate places. [2023-11-29 06:22:06,783 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 1151 transitions, 14469 flow [2023-11-29 06:22:06,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 33.916666666666664) internal successors, (814), 24 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:06,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:06,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:06,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:22:06,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:22:06,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:22:06,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1585611138, now seen corresponding path program 1 times [2023-11-29 06:22:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:06,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005280352] [2023-11-29 06:22:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:06,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005280352] [2023-11-29 06:22:07,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005280352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471220552] [2023-11-29 06:22:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:07,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:07,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:07,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:07,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:22:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:07,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:22:07,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:07,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:07,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471220552] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:07,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:07,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2023-11-29 06:22:07,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844979664] [2023-11-29 06:22:07,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:07,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:22:07,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:07,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:22:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:22:07,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 57 [2023-11-29 06:22:07,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 1151 transitions, 14469 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:07,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:07,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 57 [2023-11-29 06:22:07,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:31,652 INFO L124 PetriNetUnfolderBase]: 43172/72793 cut-off events. [2023-11-29 06:22:31,652 INFO L125 PetriNetUnfolderBase]: For 986643/1007035 co-relation queries the response was YES. [2023-11-29 06:22:32,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436144 conditions, 72793 events. 43172/72793 cut-off events. For 986643/1007035 co-relation queries the response was YES. Maximal size of possible extension queue 4021. Compared 682974 event pairs, 4187 based on Foata normal form. 5565/77219 useless extension candidates. Maximal degree in co-relation 436035. Up to 17057 conditions per place. [2023-11-29 06:22:33,004 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 1178 selfloop transitions, 776 changer transitions 17/2010 dead transitions. [2023-11-29 06:22:33,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 2010 transitions, 29284 flow [2023-11-29 06:22:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:22:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:22:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2023-11-29 06:22:33,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8045112781954887 [2023-11-29 06:22:33,006 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 321 transitions. [2023-11-29 06:22:33,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 321 transitions. [2023-11-29 06:22:33,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:33,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 321 transitions. [2023-11-29 06:22:33,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.857142857142854) internal successors, (321), 7 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:33,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:33,007 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:33,007 INFO L175 Difference]: Start difference. First operand has 273 places, 1151 transitions, 14469 flow. Second operand 7 states and 321 transitions. [2023-11-29 06:22:33,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 2010 transitions, 29284 flow [2023-11-29 06:22:53,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 2010 transitions, 27651 flow, removed 796 selfloop flow, removed 4 redundant places. [2023-11-29 06:22:53,482 INFO L231 Difference]: Finished difference. Result has 281 places, 1611 transitions, 22210 flow [2023-11-29 06:22:53,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=13453, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22210, PETRI_PLACES=281, PETRI_TRANSITIONS=1611} [2023-11-29 06:22:53,484 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 221 predicate places. [2023-11-29 06:22:53,484 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1611 transitions, 22210 flow [2023-11-29 06:22:53,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:53,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:53,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:53,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:22:53,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:22:53,686 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:22:53,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2081849984, now seen corresponding path program 2 times [2023-11-29 06:22:53,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:53,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63054892] [2023-11-29 06:22:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:53,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63054892] [2023-11-29 06:22:55,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63054892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874712927] [2023-11-29 06:22:55,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:55,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:55,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:55,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:22:55,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:55,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:22:55,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:56,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:22:59,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874712927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:59,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:59,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-29 06:22:59,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107594584] [2023-11-29 06:22:59,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:22:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:22:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:23:00,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 57 [2023-11-29 06:23:00,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1611 transitions, 22210 flow. Second operand has 24 states, 24 states have (on average 33.833333333333336) internal successors, (812), 24 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:00,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:00,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 57 [2023-11-29 06:23:00,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:23,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:24:44,831 INFO L124 PetriNetUnfolderBase]: 104806/161775 cut-off events. [2023-11-29 06:24:44,831 INFO L125 PetriNetUnfolderBase]: For 2494010/2516174 co-relation queries the response was YES. [2023-11-29 06:24:47,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044709 conditions, 161775 events. 104806/161775 cut-off events. For 2494010/2516174 co-relation queries the response was YES. Maximal size of possible extension queue 7027. Compared 1432289 event pairs, 6908 based on Foata normal form. 7762/167928 useless extension candidates. Maximal degree in co-relation 1044593. Up to 34840 conditions per place. [2023-11-29 06:24:48,084 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 1387 selfloop transitions, 2274 changer transitions 134/3823 dead transitions. [2023-11-29 06:24:48,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 3823 transitions, 60276 flow [2023-11-29 06:24:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 06:24:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-11-29 06:24:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 3824 transitions. [2023-11-29 06:24:48,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6988304093567251 [2023-11-29 06:24:48,092 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 3824 transitions. [2023-11-29 06:24:48,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 3824 transitions. [2023-11-29 06:24:48,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:48,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 3824 transitions. [2023-11-29 06:24:48,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 39.833333333333336) internal successors, (3824), 96 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:48,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 57.0) internal successors, (5529), 97 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:48,114 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 57.0) internal successors, (5529), 97 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:48,114 INFO L175 Difference]: Start difference. First operand has 281 places, 1611 transitions, 22210 flow. Second operand 96 states and 3824 transitions. [2023-11-29 06:24:48,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 3823 transitions, 60276 flow [2023-11-29 06:26:32,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 3823 transitions, 59810 flow, removed 233 selfloop flow, removed 0 redundant places. [2023-11-29 06:26:32,437 INFO L231 Difference]: Finished difference. Result has 421 places, 2915 transitions, 50996 flow [2023-11-29 06:26:32,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=22086, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=50996, PETRI_PLACES=421, PETRI_TRANSITIONS=2915} [2023-11-29 06:26:32,439 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 361 predicate places. [2023-11-29 06:26:32,440 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 2915 transitions, 50996 flow [2023-11-29 06:26:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 33.833333333333336) internal successors, (812), 24 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:32,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:26:32,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:32,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:26:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:26:32,641 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 06:26:32,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1417147140, now seen corresponding path program 1 times [2023-11-29 06:26:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:32,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764820473] [2023-11-29 06:26:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:34,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764820473] [2023-11-29 06:26:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764820473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:26:34,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475497911] [2023-11-29 06:26:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:34,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:34,627 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:34,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606f2fd4-8324-4a00-bbf2-251f52f1af13/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:26:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:34,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:26:34,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:35,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:26:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475497911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:37,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:26:37,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-11-29 06:26:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672848643] [2023-11-29 06:26:37,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:26:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:26:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:26:37,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 57 [2023-11-29 06:26:37,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 2915 transitions, 50996 flow. Second operand has 29 states, 29 states have (on average 30.79310344827586) internal successors, (893), 29 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:37,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:26:37,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 57 [2023-11-29 06:26:37,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:33,128 INFO L124 PetriNetUnfolderBase]: 240103/354753 cut-off events. [2023-11-29 06:31:33,128 INFO L125 PetriNetUnfolderBase]: For 6923069/6923766 co-relation queries the response was YES. [2023-11-29 06:31:39,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487991 conditions, 354753 events. 240103/354753 cut-off events. For 6923069/6923766 co-relation queries the response was YES. Maximal size of possible extension queue 12025. Compared 3096872 event pairs, 25131 based on Foata normal form. 419/355051 useless extension candidates. Maximal degree in co-relation 2487828. Up to 158524 conditions per place. [2023-11-29 06:31:41,315 INFO L140 encePairwiseOnDemand]: 42/57 looper letters, 3973 selfloop transitions, 2851 changer transitions 1444/8280 dead transitions. [2023-11-29 06:31:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 8280 transitions, 154774 flow [2023-11-29 06:31:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-29 06:31:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2023-11-29 06:31:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 4494 transitions. [2023-11-29 06:31:41,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6570175438596492 [2023-11-29 06:31:41,321 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 4494 transitions. [2023-11-29 06:31:41,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 4494 transitions. [2023-11-29 06:31:41,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:41,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 4494 transitions. [2023-11-29 06:31:41,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 37.45) internal successors, (4494), 120 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:41,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 57.0) internal successors, (6897), 121 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:41,347 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 57.0) internal successors, (6897), 121 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:41,348 INFO L175 Difference]: Start difference. First operand has 421 places, 2915 transitions, 50996 flow. Second operand 120 states and 4494 transitions. [2023-11-29 06:31:41,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 8280 transitions, 154774 flow