./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_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/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_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme --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 [2023-11-26 12:03:07,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:08,017 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 12:03:08,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:08,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:08,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:08,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:08,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:08,054 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:08,055 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:08,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:08,056 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:08,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:08,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:08,059 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:08,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:08,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:03:08,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:08,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:03:08,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:08,063 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 12:03:08,063 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 12:03:08,064 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 12:03:08,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:08,065 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 12:03:08,066 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:03:08,067 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:03:08,067 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:08,068 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:08,068 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:08,069 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:08,069 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:08,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:08,070 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:08,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:08,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:08,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:08,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:08,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:08,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:08,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:08,073 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_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 [2023-11-26 12:03:08,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:08,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:08,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:08,464 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:08,465 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:08,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2023-11-26 12:03:11,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:12,106 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:12,106 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2023-11-26 12:03:12,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/data/f96f08b7f/9661dc852d944eb691553d115e1159ca/FLAG2006b7788 [2023-11-26 12:03:12,130 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/data/f96f08b7f/9661dc852d944eb691553d115e1159ca [2023-11-26 12:03:12,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:12,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:12,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:12,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:12,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:12,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a9509e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12, skipping insertion in model container [2023-11-26 12:03:12,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:12,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:12,445 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:12,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:12,491 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:12,492 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:12,501 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:12,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12 WrapperNode [2023-11-26 12:03:12,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:12,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:12,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:12,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:12,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,574 INFO L138 Inliner]: procedures = 22, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 83 [2023-11-26 12:03:12,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:12,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:12,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:12,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:12,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,604 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,636 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]. [2023-11-26 12:03:12,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,665 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:12,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:12,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:12,674 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:12,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (1/1) ... [2023-11-26 12:03:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:12,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:12,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:12,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:03:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:03:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:03:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:03:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:03:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:03:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:03:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:03:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:03:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:03:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:03:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:03:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:03:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:03:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:03:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:03:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:12,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:03:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:03:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:03:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:03:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:03:12,762 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:03:12,931 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:12,935 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:13,297 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:13,625 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:13,626 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 12:03:13,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:13 BoogieIcfgContainer [2023-11-26 12:03:13,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:13,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:13,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:13,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:13,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:12" (1/3) ... [2023-11-26 12:03:13,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3f09c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:13, skipping insertion in model container [2023-11-26 12:03:13,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:12" (2/3) ... [2023-11-26 12:03:13,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3f09c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:13, skipping insertion in model container [2023-11-26 12:03:13,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:13" (3/3) ... [2023-11-26 12:03:13,641 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2023-11-26 12:03:13,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:13,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-26 12:03:13,662 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:03:13,777 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 12:03:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 57 transitions, 135 flow [2023-11-26 12:03:13,859 INFO L124 PetriNetUnfolderBase]: 3/54 cut-off events. [2023-11-26 12:03:13,860 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:03:13,867 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. [2023-11-26 12:03:13,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 57 transitions, 135 flow [2023-11-26 12:03:13,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 53 transitions, 124 flow [2023-11-26 12:03:13,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:13,894 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;@127f1fe5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:13,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-26 12:03:13,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:03:13,898 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-26 12:03:13,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 12:03:13,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:13,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 12:03:13,901 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)] === [2023-11-26 12:03:13,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash 11174, now seen corresponding path program 1 times [2023-11-26 12:03:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:13,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543115758] [2023-11-26 12:03:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:14,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:14,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543115758] [2023-11-26 12:03:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543115758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:14,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:14,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489324984] [2023-11-26 12:03:14,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:14,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:14,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:14,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-26 12:03:14,538 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) [2023-11-26 12:03:14,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:14,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-26 12:03:14,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:14,756 INFO L124 PetriNetUnfolderBase]: 295/651 cut-off events. [2023-11-26 12:03:14,756 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-26 12:03:14,763 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. [2023-11-26 12:03:14,771 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 19 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-26 12:03:14,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 156 flow [2023-11-26 12:03:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-26 12:03:14,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134502923976608 [2023-11-26 12:03:14,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-26 12:03:14,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-26 12:03:14,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:14,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-26 12:03:14,794 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) [2023-11-26 12:03:14,798 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) [2023-11-26 12:03:14,799 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) [2023-11-26 12:03:14,801 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 124 flow. Second operand 3 states and 122 transitions. [2023-11-26 12:03:14,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 156 flow [2023-11-26 12:03:14,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 12:03:14,809 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 106 flow [2023-11-26 12:03:14,811 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} [2023-11-26 12:03:14,815 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-11-26 12:03:14,816 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 106 flow [2023-11-26 12:03:14,816 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) [2023-11-26 12:03:14,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:14,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-26 12:03:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:03:14,817 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)] === [2023-11-26 12:03:14,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash 11175, now seen corresponding path program 1 times [2023-11-26 12:03:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564369593] [2023-11-26 12:03:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564369593] [2023-11-26 12:03:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564369593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:15,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:15,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:15,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086757987] [2023-11-26 12:03:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:15,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:15,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:15,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:15,231 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) [2023-11-26 12:03:15,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:15,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:15,372 INFO L124 PetriNetUnfolderBase]: 202/495 cut-off events. [2023-11-26 12:03:15,372 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 12:03:15,375 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. [2023-11-26 12:03:15,379 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 17 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-26 12:03:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 138 flow [2023-11-26 12:03:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-26 12:03:15,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309941520467836 [2023-11-26 12:03:15,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-26 12:03:15,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-26 12:03:15,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:15,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-26 12:03:15,395 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) [2023-11-26 12:03:15,396 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) [2023-11-26 12:03:15,397 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) [2023-11-26 12:03:15,398 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 106 flow. Second operand 3 states and 125 transitions. [2023-11-26 12:03:15,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 138 flow [2023-11-26 12:03:15,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:15,402 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 103 flow [2023-11-26 12:03:15,403 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} [2023-11-26 12:03:15,409 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-11-26 12:03:15,409 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 103 flow [2023-11-26 12:03:15,410 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) [2023-11-26 12:03:15,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:15,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:03:15,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:03:15,411 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)] === [2023-11-26 12:03:15,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:15,414 INFO L85 PathProgramCache]: Analyzing trace with hash 333226199, now seen corresponding path program 1 times [2023-11-26 12:03:15,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:15,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451793339] [2023-11-26 12:03:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:15,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451793339] [2023-11-26 12:03:15,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451793339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:15,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:15,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:15,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327794061] [2023-11-26 12:03:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:15,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:15,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:15,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-26 12:03:15,560 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) [2023-11-26 12:03:15,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:15,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-26 12:03:15,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:15,667 INFO L124 PetriNetUnfolderBase]: 227/519 cut-off events. [2023-11-26 12:03:15,667 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-26 12:03:15,669 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. [2023-11-26 12:03:15,674 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 19 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-26 12:03:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 139 flow [2023-11-26 12:03:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-26 12:03:15,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076023391812866 [2023-11-26 12:03:15,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-26 12:03:15,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-26 12:03:15,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:15,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-26 12:03:15,678 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) [2023-11-26 12:03:15,679 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) [2023-11-26 12:03:15,679 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) [2023-11-26 12:03:15,680 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 103 flow. Second operand 3 states and 121 transitions. [2023-11-26 12:03:15,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 139 flow [2023-11-26 12:03:15,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:15,682 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 100 flow [2023-11-26 12:03:15,682 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} [2023-11-26 12:03:15,683 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -10 predicate places. [2023-11-26 12:03:15,683 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 100 flow [2023-11-26 12:03:15,684 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) [2023-11-26 12:03:15,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:15,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:03:15,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:03:15,685 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)] === [2023-11-26 12:03:15,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash 333226200, now seen corresponding path program 1 times [2023-11-26 12:03:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608619078] [2023-11-26 12:03:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:15,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608619078] [2023-11-26 12:03:15,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608619078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:15,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:15,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404601269] [2023-11-26 12:03:15,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:15,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:15,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:15,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:15,838 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) [2023-11-26 12:03:15,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:15,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:15,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:15,929 INFO L124 PetriNetUnfolderBase]: 202/471 cut-off events. [2023-11-26 12:03:15,929 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 12:03:15,932 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. [2023-11-26 12:03:15,936 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 17 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-26 12:03:15,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 132 flow [2023-11-26 12:03:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-26 12:03:15,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309941520467836 [2023-11-26 12:03:15,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-26 12:03:15,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-26 12:03:15,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:15,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-26 12:03:15,942 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) [2023-11-26 12:03:15,942 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) [2023-11-26 12:03:15,943 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) [2023-11-26 12:03:15,943 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 100 flow. Second operand 3 states and 125 transitions. [2023-11-26 12:03:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 132 flow [2023-11-26 12:03:15,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 131 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:15,946 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 97 flow [2023-11-26 12:03:15,947 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} [2023-11-26 12:03:15,948 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -11 predicate places. [2023-11-26 12:03:15,949 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 97 flow [2023-11-26 12:03:15,949 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) [2023-11-26 12:03:15,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:15,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:15,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:03:15,950 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)] === [2023-11-26 12:03:15,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1472618476, now seen corresponding path program 1 times [2023-11-26 12:03:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:15,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033337521] [2023-11-26 12:03:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:16,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:16,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033337521] [2023-11-26 12:03:16,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033337521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:16,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:16,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:16,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743824679] [2023-11-26 12:03:16,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:16,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:16,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:16,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:16,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:16,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-26 12:03:16,036 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) [2023-11-26 12:03:16,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:16,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-26 12:03:16,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:16,164 INFO L124 PetriNetUnfolderBase]: 219/479 cut-off events. [2023-11-26 12:03:16,164 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-26 12:03:16,166 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. [2023-11-26 12:03:16,170 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 19 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-26 12:03:16,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 133 flow [2023-11-26 12:03:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-26 12:03:16,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076023391812866 [2023-11-26 12:03:16,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-26 12:03:16,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-26 12:03:16,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:16,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-26 12:03:16,174 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) [2023-11-26 12:03:16,177 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) [2023-11-26 12:03:16,177 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) [2023-11-26 12:03:16,177 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 97 flow. Second operand 3 states and 121 transitions. [2023-11-26 12:03:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 133 flow [2023-11-26 12:03:16,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:16,180 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 94 flow [2023-11-26 12:03:16,180 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} [2023-11-26 12:03:16,182 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -12 predicate places. [2023-11-26 12:03:16,183 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 94 flow [2023-11-26 12:03:16,183 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) [2023-11-26 12:03:16,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:16,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:16,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:03:16,183 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)] === [2023-11-26 12:03:16,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1472618477, now seen corresponding path program 1 times [2023-11-26 12:03:16,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:16,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358407799] [2023-11-26 12:03:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:16,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358407799] [2023-11-26 12:03:16,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358407799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:16,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:16,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494613544] [2023-11-26 12:03:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:16,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:16,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:16,306 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) [2023-11-26 12:03:16,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:16,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:16,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:16,396 INFO L124 PetriNetUnfolderBase]: 202/447 cut-off events. [2023-11-26 12:03:16,396 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-26 12:03:16,398 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. [2023-11-26 12:03:16,401 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 17 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-26 12:03:16,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 126 flow [2023-11-26 12:03:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-26 12:03:16,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7309941520467836 [2023-11-26 12:03:16,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-26 12:03:16,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-26 12:03:16,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:16,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-26 12:03:16,404 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) [2023-11-26 12:03:16,405 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) [2023-11-26 12:03:16,405 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) [2023-11-26 12:03:16,405 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 94 flow. Second operand 3 states and 125 transitions. [2023-11-26 12:03:16,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 126 flow [2023-11-26 12:03:16,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:16,407 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 91 flow [2023-11-26 12:03:16,407 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} [2023-11-26 12:03:16,408 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2023-11-26 12:03:16,408 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 91 flow [2023-11-26 12:03:16,408 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) [2023-11-26 12:03:16,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:16,409 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] [2023-11-26 12:03:16,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:03:16,409 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)] === [2023-11-26 12:03:16,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:16,409 INFO L85 PathProgramCache]: Analyzing trace with hash 38098687, now seen corresponding path program 1 times [2023-11-26 12:03:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:16,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512649232] [2023-11-26 12:03:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512649232] [2023-11-26 12:03:16,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512649232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:16,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:16,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522298270] [2023-11-26 12:03:16,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:16,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:16,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:16,866 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) [2023-11-26 12:03:16,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:16,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:16,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:17,133 INFO L124 PetriNetUnfolderBase]: 603/1021 cut-off events. [2023-11-26 12:03:17,134 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-26 12:03:17,135 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. [2023-11-26 12:03:17,143 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 44 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-11-26 12:03:17,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 265 flow [2023-11-26 12:03:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:03:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2023-11-26 12:03:17,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8035087719298246 [2023-11-26 12:03:17,145 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 229 transitions. [2023-11-26 12:03:17,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 229 transitions. [2023-11-26 12:03:17,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:17,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 229 transitions. [2023-11-26 12:03:17,147 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) [2023-11-26 12:03:17,148 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) [2023-11-26 12:03:17,148 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) [2023-11-26 12:03:17,148 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 91 flow. Second operand 5 states and 229 transitions. [2023-11-26 12:03:17,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 265 flow [2023-11-26 12:03:17,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:17,151 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 150 flow [2023-11-26 12:03:17,151 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} [2023-11-26 12:03:17,152 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2023-11-26 12:03:17,152 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 150 flow [2023-11-26 12:03:17,153 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) [2023-11-26 12:03:17,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:17,153 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] [2023-11-26 12:03:17,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 12:03:17,153 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)] === [2023-11-26 12:03:17,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash 807555886, now seen corresponding path program 1 times [2023-11-26 12:03:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:17,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141724804] [2023-11-26 12:03:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:17,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:17,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:17,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141724804] [2023-11-26 12:03:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141724804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:17,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546037069] [2023-11-26 12:03:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:17,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:17,697 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) [2023-11-26 12:03:17,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:17,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:17,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:17,970 INFO L124 PetriNetUnfolderBase]: 704/1214 cut-off events. [2023-11-26 12:03:17,971 INFO L125 PetriNetUnfolderBase]: For 1044/1080 co-relation queries the response was YES. [2023-11-26 12:03:17,974 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. [2023-11-26 12:03:17,986 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 35 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2023-11-26 12:03:17,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 323 flow [2023-11-26 12:03:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:03:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:03:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2023-11-26 12:03:17,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7850877192982456 [2023-11-26 12:03:17,988 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 179 transitions. [2023-11-26 12:03:17,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 179 transitions. [2023-11-26 12:03:17,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:17,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 179 transitions. [2023-11-26 12:03:17,990 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) [2023-11-26 12:03:17,991 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) [2023-11-26 12:03:17,991 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) [2023-11-26 12:03:17,991 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 150 flow. Second operand 4 states and 179 transitions. [2023-11-26 12:03:17,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 323 flow [2023-11-26 12:03:17,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:17,996 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 218 flow [2023-11-26 12:03:17,996 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} [2023-11-26 12:03:17,999 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-11-26 12:03:17,999 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 218 flow [2023-11-26 12:03:17,999 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) [2023-11-26 12:03:18,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:18,000 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] [2023-11-26 12:03:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 12:03:18,000 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)] === [2023-11-26 12:03:18,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1032396546, now seen corresponding path program 1 times [2023-11-26 12:03:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:18,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640386282] [2023-11-26 12:03:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:18,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:18,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640386282] [2023-11-26 12:03:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640386282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:18,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:18,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:18,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492598428] [2023-11-26 12:03:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:18,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:18,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:18,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:18,477 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) [2023-11-26 12:03:18,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:18,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:18,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:18,807 INFO L124 PetriNetUnfolderBase]: 843/1401 cut-off events. [2023-11-26 12:03:18,808 INFO L125 PetriNetUnfolderBase]: For 1810/1942 co-relation queries the response was YES. [2023-11-26 12:03:18,811 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. [2023-11-26 12:03:18,823 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 51 selfloop transitions, 7 changer transitions 2/80 dead transitions. [2023-11-26 12:03:18,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 450 flow [2023-11-26 12:03:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:03:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 224 transitions. [2023-11-26 12:03:18,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7859649122807018 [2023-11-26 12:03:18,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 224 transitions. [2023-11-26 12:03:18,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 224 transitions. [2023-11-26 12:03:18,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:18,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 224 transitions. [2023-11-26 12:03:18,826 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) [2023-11-26 12:03:18,827 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) [2023-11-26 12:03:18,827 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) [2023-11-26 12:03:18,827 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 218 flow. Second operand 5 states and 224 transitions. [2023-11-26 12:03:18,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 450 flow [2023-11-26 12:03:18,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 12:03:18,836 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 272 flow [2023-11-26 12:03:18,837 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} [2023-11-26 12:03:18,839 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2023-11-26 12:03:18,839 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 272 flow [2023-11-26 12:03:18,840 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) [2023-11-26 12:03:18,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:18,840 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] [2023-11-26 12:03:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 12:03:18,840 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)] === [2023-11-26 12:03:18,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:18,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1016292944, now seen corresponding path program 1 times [2023-11-26 12:03:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:18,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073287455] [2023-11-26 12:03:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:03:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:19,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073287455] [2023-11-26 12:03:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073287455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:19,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:19,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:19,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122760637] [2023-11-26 12:03:19,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:19,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:19,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:19,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:19,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:19,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 57 [2023-11-26 12:03:19,230 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) [2023-11-26 12:03:19,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:19,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 57 [2023-11-26 12:03:19,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:19,622 INFO L124 PetriNetUnfolderBase]: 1168/1925 cut-off events. [2023-11-26 12:03:19,623 INFO L125 PetriNetUnfolderBase]: For 3229/3394 co-relation queries the response was YES. [2023-11-26 12:03:19,628 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. [2023-11-26 12:03:19,644 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 65 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2023-11-26 12:03:19,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 99 transitions, 629 flow [2023-11-26 12:03:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 12:03:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2023-11-26 12:03:19,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8105263157894737 [2023-11-26 12:03:19,647 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 231 transitions. [2023-11-26 12:03:19,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 231 transitions. [2023-11-26 12:03:19,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:19,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 231 transitions. [2023-11-26 12:03:19,648 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) [2023-11-26 12:03:19,649 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) [2023-11-26 12:03:19,649 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) [2023-11-26 12:03:19,649 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 272 flow. Second operand 5 states and 231 transitions. [2023-11-26 12:03:19,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 99 transitions, 629 flow [2023-11-26 12:03:19,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:19,657 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 381 flow [2023-11-26 12:03:19,658 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} [2023-11-26 12:03:19,658 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2023-11-26 12:03:19,659 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 381 flow [2023-11-26 12:03:19,659 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) [2023-11-26 12:03:19,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:19,659 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] [2023-11-26 12:03:19,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 12:03:19,660 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)] === [2023-11-26 12:03:19,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 171244775, now seen corresponding path program 1 times [2023-11-26 12:03:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:19,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238990972] [2023-11-26 12:03:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:19,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238990972] [2023-11-26 12:03:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238990972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:20,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738067666] [2023-11-26 12:03:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:20,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:20,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:20,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:03:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:20,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 12:03:20,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:03:20,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738067666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:20,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:03:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-26 12:03:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735073460] [2023-11-26 12:03:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:03:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:03:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:20,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 57 [2023-11-26 12:03:20,351 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) [2023-11-26 12:03:20,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:20,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 57 [2023-11-26 12:03:20,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:20,917 INFO L124 PetriNetUnfolderBase]: 1910/3125 cut-off events. [2023-11-26 12:03:20,917 INFO L125 PetriNetUnfolderBase]: For 8394/8466 co-relation queries the response was YES. [2023-11-26 12:03:20,930 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. [2023-11-26 12:03:20,958 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 81 selfloop transitions, 15 changer transitions 4/117 dead transitions. [2023-11-26 12:03:20,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 891 flow [2023-11-26 12:03:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:03:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:03:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 299 transitions. [2023-11-26 12:03:20,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7493734335839599 [2023-11-26 12:03:20,960 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 299 transitions. [2023-11-26 12:03:20,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 299 transitions. [2023-11-26 12:03:20,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:20,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 299 transitions. [2023-11-26 12:03:20,962 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) [2023-11-26 12:03:20,963 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) [2023-11-26 12:03:20,963 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) [2023-11-26 12:03:20,963 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 381 flow. Second operand 7 states and 299 transitions. [2023-11-26 12:03:20,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 891 flow [2023-11-26 12:03:20,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 877 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:20,983 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 437 flow [2023-11-26 12:03:20,984 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} [2023-11-26 12:03:20,984 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2023-11-26 12:03:20,984 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 437 flow [2023-11-26 12:03:20,985 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) [2023-11-26 12:03:20,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:20,985 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] [2023-11-26 12:03:21,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:21,195 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)] === [2023-11-26 12:03:21,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1593292369, now seen corresponding path program 2 times [2023-11-26 12:03:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:21,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42443594] [2023-11-26 12:03:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42443594] [2023-11-26 12:03:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42443594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:21,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:21,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:03:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093994705] [2023-11-26 12:03:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:03:21,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 57 [2023-11-26 12:03:21,626 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) [2023-11-26 12:03:21,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:21,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 57 [2023-11-26 12:03:21,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:22,438 INFO L124 PetriNetUnfolderBase]: 2556/3915 cut-off events. [2023-11-26 12:03:22,438 INFO L125 PetriNetUnfolderBase]: For 12952/13131 co-relation queries the response was YES. [2023-11-26 12:03:22,459 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. [2023-11-26 12:03:22,505 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 83 selfloop transitions, 18 changer transitions 0/127 dead transitions. [2023-11-26 12:03:22,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 1051 flow [2023-11-26 12:03:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:03:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:03:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2023-11-26 12:03:22,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7243107769423559 [2023-11-26 12:03:22,508 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 289 transitions. [2023-11-26 12:03:22,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 289 transitions. [2023-11-26 12:03:22,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:22,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 289 transitions. [2023-11-26 12:03:22,509 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) [2023-11-26 12:03:22,511 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) [2023-11-26 12:03:22,513 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) [2023-11-26 12:03:22,513 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 437 flow. Second operand 7 states and 289 transitions. [2023-11-26 12:03:22,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 1051 flow [2023-11-26 12:03:22,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 1006 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-26 12:03:22,553 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 526 flow [2023-11-26 12:03:22,553 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} [2023-11-26 12:03:22,555 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 22 predicate places. [2023-11-26 12:03:22,555 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 526 flow [2023-11-26 12:03:22,555 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) [2023-11-26 12:03:22,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:22,556 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] [2023-11-26 12:03:22,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 12:03:22,556 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)] === [2023-11-26 12:03:22,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2123522515, now seen corresponding path program 3 times [2023-11-26 12:03:22,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:22,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848594191] [2023-11-26 12:03:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:22,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848594191] [2023-11-26 12:03:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848594191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:03:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038870851] [2023-11-26 12:03:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:22,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:03:22,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:03:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:03:23,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 57 [2023-11-26 12:03:23,036 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) [2023-11-26 12:03:23,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:23,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 57 [2023-11-26 12:03:23,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:24,097 INFO L124 PetriNetUnfolderBase]: 3211/4880 cut-off events. [2023-11-26 12:03:24,098 INFO L125 PetriNetUnfolderBase]: For 21552/21755 co-relation queries the response was YES. [2023-11-26 12:03:24,123 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. [2023-11-26 12:03:24,163 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 107 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2023-11-26 12:03:24,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 159 transitions, 1425 flow [2023-11-26 12:03:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:03:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 12:03:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 407 transitions. [2023-11-26 12:03:24,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7140350877192982 [2023-11-26 12:03:24,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 407 transitions. [2023-11-26 12:03:24,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 407 transitions. [2023-11-26 12:03:24,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:24,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 407 transitions. [2023-11-26 12:03:24,168 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) [2023-11-26 12:03:24,170 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) [2023-11-26 12:03:24,170 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) [2023-11-26 12:03:24,170 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 526 flow. Second operand 10 states and 407 transitions. [2023-11-26 12:03:24,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 159 transitions, 1425 flow [2023-11-26 12:03:24,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 159 transitions, 1415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:24,209 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 649 flow [2023-11-26 12:03:24,209 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} [2023-11-26 12:03:24,210 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2023-11-26 12:03:24,210 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 649 flow [2023-11-26 12:03:24,210 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) [2023-11-26 12:03:24,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:24,211 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] [2023-11-26 12:03:24,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 12:03:24,211 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)] === [2023-11-26 12:03:24,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash -689092095, now seen corresponding path program 4 times [2023-11-26 12:03:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007696353] [2023-11-26 12:03:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:27,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:27,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007696353] [2023-11-26 12:03:27,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007696353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:27,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286300969] [2023-11-26 12:03:27,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:03:27,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:27,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:27,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:03:28,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:03:28,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:28,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 12:03:28,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:29,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:31,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286300969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:31,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:31,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-26 12:03:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387724008] [2023-11-26 12:03:31,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:31,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:03:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:03:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:03:33,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 57 [2023-11-26 12:03:33,524 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) [2023-11-26 12:03:33,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:33,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 57 [2023-11-26 12:03:33,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:47,541 INFO L124 PetriNetUnfolderBase]: 14069/22831 cut-off events. [2023-11-26 12:03:47,541 INFO L125 PetriNetUnfolderBase]: For 122869/127571 co-relation queries the response was YES. [2023-11-26 12:03:47,738 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. [2023-11-26 12:03:47,912 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 281 selfloop transitions, 242 changer transitions 41/599 dead transitions. [2023-11-26 12:03:47,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 599 transitions, 5696 flow [2023-11-26 12:03:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-26 12:03:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-26 12:03:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2027 transitions. [2023-11-26 12:03:47,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7566256065696155 [2023-11-26 12:03:47,922 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2027 transitions. [2023-11-26 12:03:47,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2027 transitions. [2023-11-26 12:03:47,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:47,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2027 transitions. [2023-11-26 12:03:47,936 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) [2023-11-26 12:03:47,943 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) [2023-11-26 12:03:47,945 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) [2023-11-26 12:03:47,946 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 649 flow. Second operand 47 states and 2027 transitions. [2023-11-26 12:03:47,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 599 transitions, 5696 flow [2023-11-26 12:03:48,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 599 transitions, 5564 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-26 12:03:48,355 INFO L231 Difference]: Finished difference. Result has 151 places, 347 transitions, 3919 flow [2023-11-26 12:03:48,355 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} [2023-11-26 12:03:48,356 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 91 predicate places. [2023-11-26 12:03:48,356 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 347 transitions, 3919 flow [2023-11-26 12:03:48,357 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) [2023-11-26 12:03:48,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:48,357 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] [2023-11-26 12:03:48,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:48,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:03:48,563 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)] === [2023-11-26 12:03:48,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash -297939239, now seen corresponding path program 5 times [2023-11-26 12:03:48,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:48,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062245158] [2023-11-26 12:03:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:48,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:50,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062245158] [2023-11-26 12:03:50,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062245158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783799791] [2023-11-26 12:03:50,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:03:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:50,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:50,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db360980-dea2-4952-9f0d-90211db2b3f6/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:03:51,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:03:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:03:51,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 12:03:51,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:52,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783799791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:53,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:53,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-26 12:03:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864083271] [2023-11-26 12:03:53,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:03:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:03:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:03:54,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 57 [2023-11-26 12:03:54,602 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) [2023-11-26 12:03:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:54,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 57 [2023-11-26 12:03:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand